From d21b699a30eadef16a43edde24586bddafe94e25 Mon Sep 17 00:00:00 2001
From: MP <53620289+Marco-Pellegrino@users.noreply.github.com>
Date: Thu, 3 Nov 2022 12:00:03 +0100
Subject: [PATCH] 21.5.0 (#544)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* test to fix errors

* :construction: Fix Some Reference Error

* Update FemDesign.Dynamo.csproj

* add missing file

* :bug: Dynamo can't have default enum argument

Fix #498

* Constructor with Default Parameters

* :lipstick: Input Renaming

#494

* Update LoadCombinationConstruct.cs

close #494

* Update Panel.cs

#523

* :sparkles:  update xml attributes for BarPart

* stiffness modifier does not reset

#521

* fix

#538

* StiffnessPoint Constructor C# Gh

* :sparkles: Icon

* :memo: Practical example

#508

* match filepath nickname with runDesign

* :lipstick:

unnecessary information

* Update SupportDeconstuctor.cs

#483

* :bug:  removing-default-material

#491

* model run return a bool

#487

* :bug: Plane input

#559

* Update Region.cs

* :pencil: rename component

* :bug: correct serialisation in case of default value

#562

* :bug: load combination set up

#566 fix

* :bug: read material bug

* Update SectionDefine.cs

* :bug: custom section database

* :fire: name input was not necessary

* :zap: Model serialize paths

- Allow relative paths
- Omitted extension will be changed to struxml

* example 5 update

* :pencil2: Fix typo;

* ⚠ Better warning on version mismatch

Fix #555

* Revert "Update SupportDeconstuctor.cs"

This reverts commit 4e464a649fb25a1eba8c0905fa2c223ee8ffe470.

* Update SupportDeconstuctor.cs

* :sparkles: Add StageLoadCase to LoadCombination

Fix #561

* :bug: Parameterless constructor for serialization

* fix enum default

* result type input for users

* :sparkles: Special cases in load combinations

Load combinations can now be constructed and deconstructed with
- Construction stage
- Seismic case
- PTC case
- Pile/Neg. Shaft friction case

In C# and Grasshopper

Fix #561

* :sparkles: Line stress load

- Added constructors for C#
- Added constructor component for Grasshopper
- Added deconstructor component for Grasshopper
- Override ToString()

Fix #563

* :rotating_light: Fixing XML warnings (CS1570)

Warning	CS1570	XML comment has badly formed XML --

* :rotating_light: Fixing XML warnings (CS1572)

Warning	CS1572	XML comment has a param tag for *, but there is no parameter by that name

* :rotating_light: Fixing XML warnings (CS1573)

Warning	CS1573	Parameter * has no matching param tag in the XML comment for * (but other parameters do)

* :rotating_light: Fixing warning CS8602

Warning	CS8602	Dereference of a possibly null reference.

* :rotating_light: Fixing CS0168, CS0169, CS0219

Warning	CS0219	The variable * is assigned but its value is never used
Warning	CS0169	The field * is never used
Warning	CS0168	The variable 'ex' is declared but never used

* :rotating_light: Ignore warning CS1591

Ignore the warning: "Missing XML comment for publicly visible type or member *"

* :bug: Fix mistake

* :memo: Add comment on special load cases

* :bug: Fix dynamo references

* :bug: Name/Identifier #529

Work in progress on #529

- Added tests (failing for now)
- Added LockedIdentifier property on Bar

* :bug: Remove bar.Name setter

Work in progress on #529

* :lipstick: Add Icons for LineStressLoad

Fix #563

* :pencil2: Copy paste typo

* :sparkles: Abstract class NamedEntityBase

Fix #529

* :sparkles: Bar to use BarPart Name and Instance

#511

* Update LineStressLoadDefine.cs

* :fire: EntityBase => NamedEntityBase

Using NamedEntityBase instead of EntityBase where applicable and remove duplicate code for properties Name, Identifier and Instance for many classes

* Update GlobalAssemblyInfo.cs

* :bug: Incremented instance counter twice

* :fire: EntityBase => NamedEntityBase for SlabPart

Also updated Region RectangleXY to take a reference point

* :bug: Fix SlabType

* :bug: Fix Bar identifier on create

* :lipstick: StageDeconstruct Icon

* 🔔 Make exceptions more explicit

* :rotating_light:  xml warning

* update stage component

same order for constructor and deconstructor

Co-authored-by: Andreas Oscarsson <52665994+andosca@users.noreply.github.com>
Co-authored-by: xRadne <32938476+xRadne@users.noreply.github.com>
---
 FemDesign.Core/AdvancedFem/Cover.cs           |    27 +-
 .../AuxiliaryResults/LabelledSection.cs       |    17 +-
 FemDesign.Core/Bars/Bar.cs                    |   178 +-
 FemDesign.Core/Bars/BarPart.cs                |   111 +-
 FemDesign.Core/Bars/BarStiffnessFactors.cs    |    44 +
 FemDesign.Core/Bars/Connectivity.cs           |    58 +-
 FemDesign.Core/Bars/Eccentricity.cs           |     5 +-
 FemDesign.Core/Calculate/Analysis.cs          |     2 +-
 FemDesign.Core/Calculate/Application.cs       |     1 +
 FemDesign.Core/Calculate/FdScript.cs          |     1 +
 FemDesign.Core/Calculate/Stage.cs             |     4 +-
 FemDesign.Core/FemDesign.Core.csproj          |    11 +-
 FemDesign.Core/GenericClasses/INamedEntity.cs |    32 +
 .../GenericClasses/NamedEntityBase.cs         |    74 +
 .../GenericClasses/RestrictedDouble.cs        |     4 +-
 FemDesign.Core/Geometry/Face.cs               |     1 -
 FemDesign.Core/Geometry/LineSegment.cs        |     3 +-
 FemDesign.Core/Geometry/Region.cs             |    15 +-
 FemDesign.Core/Geometry/RegionGroup.cs        |     6 +-
 FemDesign.Core/Loads/LineStressLoad.cs        |    76 +-
 FemDesign.Core/Loads/LineTemperatureLoad.cs   |     4 +-
 FemDesign.Core/Loads/LoadCombination.cs       |   213 +-
 .../Loads/LoadCombinationCaseBase.cs          |    21 +
 FemDesign.Core/Loads/LoadGroupPermanent.cs    |     1 +
 FemDesign.Core/Loads/ModelLoadCase.cs         |     9 +-
 FemDesign.Core/Loads/ModelLoadCaseInGroup.cs  |     1 +
 FemDesign.Core/Loads/PointLoad.cs             |     2 +-
 FemDesign.Core/Loads/StageLoadCase.cs         |    44 +
 FemDesign.Core/Materials/Material.cs          |     4 +-
 FemDesign.Core/Materials/MaterialDatabase.cs  |     8 +-
 FemDesign.Core/Model/Model.cs                 |   160 +-
 .../ModellingTools/ConnectedLines.cs          |    24 +-
 .../ModellingTools/ConnectedPoints.cs         |    24 +-
 FemDesign.Core/ModellingTools/Diaphragm.cs    |    21 +-
 .../ModellingTools/FictitiousBar.cs           |    28 +-
 .../ModellingTools/FictitiousShell.cs         |    29 +-
 .../ModellingTools/SurfaceConnection.cs       |    22 +-
 .../Properties/GlobalAssemblyInfo.cs          |     4 +-
 FemDesign.Core/Reinforcement/HiddenBar.cs     |    22 +-
 .../Reinforcement/LongitudinalBar.cs          |     9 +
 FemDesign.Core/Reinforcement/Ptc.cs           |     5 +
 FemDesign.Core/Releases/RigidityDataType0.cs  |    44 +
 FemDesign.Core/Sections/Section.cs            |    25 +-
 FemDesign.Core/Shells/Panel.cs                |    63 +-
 FemDesign.Core/Shells/ShellEccentricity.cs    |     1 -
 FemDesign.Core/Shells/Slab.cs                 |   112 +-
 FemDesign.Core/Shells/SlabPart.cs             |    51 +-
 FemDesign.Core/Shells/SlabStiffnessFactors.cs |    16 +
 FemDesign.Core/Stage/ActivatedLoadCase.cs     |    12 +-
 FemDesign.Core/Stage/Stage.cs                 |    62 +-
 FemDesign.Core/Supports/Group.cs              |     2 +-
 FemDesign.Core/Supports/LineSupport.cs        |    19 +-
 FemDesign.Core/Supports/PointSupport.cs       |    33 +-
 FemDesign.Core/Supports/StiffnessPoints.cs    |    62 +
 FemDesign.Core/Supports/Supports.cs           |     2 +
 FemDesign.Core/Supports/SurfaceSupport.cs     |    32 +-
 FemDesign.Dynamo/Dynamo/AdvancedFem/Cover.cs  |     4 +-
 .../AuxiliaryResults/LabelledSection.cs       |     2 +-
 FemDesign.Dynamo/Dynamo/Bars/Bar.cs           |    14 +-
 FemDesign.Dynamo/Dynamo/Bars/BarPart.cs       |     2 +-
 FemDesign.Dynamo/Dynamo/Bars/ColumnCorbel.cs  |     2 +-
 FemDesign.Dynamo/Dynamo/Bars/Connectivity.cs  |    15 +-
 FemDesign.Dynamo/Dynamo/Bars/Eccentricity.cs  |     8 -
 .../Dynamo/Calculate/Application.cs           |    10 +-
 .../Dynamo/Calculate/LoadCombination.cs       |     2 +-
 FemDesign.Dynamo/Dynamo/Calculate/Stage.cs    |     5 +
 .../Dynamo/Deconstruct/Deconstruct.cs         |    30 +-
 .../Dynamo/GenericClasses/LocationValue.cs    |     2 +-
 .../Dynamo/GenericClasses/NamedEntityBase.cs  |    20 +
 ...oordinateSystem.cs => CoordinateSystem.cs} |    46 +-
 FemDesign.Dynamo/Dynamo/Geometry/Edge.cs      |    30 +-
 .../Geometry/{FdPoint2d.cs => Point2d.cs}     |     2 +-
 .../Geometry/{FdPoint3d.cs => Point3d.cs}     |     6 +-
 FemDesign.Dynamo/Dynamo/Geometry/Region.cs    |     2 +-
 .../Geometry/{FdVector2d.cs => Vector2d.cs}   |     2 +-
 .../Geometry/{FdVector3d.cs => Vector3d.cs}   |     6 +-
 FemDesign.Dynamo/Dynamo/Loads/Footfall.cs     |     2 +-
 FemDesign.Dynamo/Dynamo/Loads/LineLoad.cs     |    16 +-
 .../Dynamo/Loads/LineStressLoad.cs            |     2 +-
 .../Dynamo/Loads/LineTemperatureLoad.cs       |     2 +-
 FemDesign.Dynamo/Dynamo/Loads/LoadCase.cs     |     2 +-
 .../Dynamo/Loads/LoadLocationValue.cs         |     2 +-
 FemDesign.Dynamo/Dynamo/Loads/PointLoad.cs    |     8 +-
 FemDesign.Dynamo/Dynamo/Loads/PressureLoad.cs |     2 +-
 FemDesign.Dynamo/Dynamo/Loads/SurfaceLoad.cs  |     4 +-
 .../Dynamo/Loads/SurfaceTemperatureLoad.cs    |     2 +-
 .../Dynamo/Loads/TopBotLocationValue.cs       |     4 +-
 FemDesign.Dynamo/Dynamo/Model/Model.cs        |    29 +-
 .../Dynamo/ModellingTools/ConnectedLines.cs   |     6 +-
 .../Dynamo/ModellingTools/ConnectedPoints.cs  |     6 +-
 .../Dynamo/ModellingTools/Diaphragm.cs        |     2 +-
 .../Dynamo/ModellingTools/FictitiousBar.cs    |     6 +-
 .../Dynamo/ModellingTools/FictitiousShell.cs  |    10 +-
 .../ModellingTools/SurfaceConnection.cs       |     2 +-
 .../Dynamo/Reinforcement/BarReinforcement.cs  |     2 +-
 .../Dynamo/Reinforcement/HiddenBar.cs         |     2 +-
 .../Dynamo/Results/BarDisplacement.cs         |    10 +-
 .../Dynamo/Results/BarInternalForce.cs        |     7 +
 FemDesign.Dynamo/Dynamo/Results/BarStress.cs  |     7 +
 .../Dynamo/Results/EigenFrequencies.cs        |     6 +
 FemDesign.Dynamo/Dynamo/Results/FeaNode.cs    |     8 +-
 .../Dynamo/Results/LineSupportReaction.cs     |    10 +-
 .../Dynamo/Results/NodalDisplacement.cs       |    10 +-
 .../Dynamo/Results/NodalVibration.cs          |    10 +-
 .../Dynamo/Results/PointSupportReaction.cs    |    12 +-
 .../Results/PointSupportReactionMinMax.cs     |    72 +
 .../Dynamo/Results/ShellDisplacement.cs       |    10 +-
 .../Dynamo/Results/ShellInternalForce.cs      |     7 +
 .../Dynamo/Shells/EdgeConnection.cs           |    15 +-
 FemDesign.Dynamo/Dynamo/Shells/Panel.cs       |     6 +-
 .../Dynamo/Shells/ShellEccentricity.cs        |     8 -
 .../Dynamo/Shells/ShellOrthotropy.cs          |     8 -
 FemDesign.Dynamo/Dynamo/Shells/Slab.cs        |    22 +-
 FemDesign.Dynamo/Dynamo/Shells/SlabPart.cs    |     2 +-
 FemDesign.Dynamo/Dynamo/Shells/Thickness.cs   |     2 +-
 .../Dynamo/Stage/ActivatedLoadCase.cs         |    21 +
 .../Dynamo/Stage/ConstructionStages.cs        |    21 +
 FemDesign.Dynamo/Dynamo/Stage/Stage.cs        |    21 +
 FemDesign.Dynamo/Dynamo/StructureGrid/Axis.cs |     4 +-
 .../Dynamo/StructureGrid/Storey.cs            |     4 +-
 .../Dynamo/Supports/LineSupport.cs            |     8 +-
 .../Dynamo/Supports/PointSupport.cs           |     8 +-
 .../Dynamo/Supports/SurfaceSupport.cs         |     6 +-
 FemDesign.Dynamo/FemDesign.Dynamo.csproj      |   107 +-
 .../Program.cs                                |     8 +-
 .../C#/Example 3 - Analyse a beam/Program.cs  |     7 +-
 .../Example10 - ConstructionStages/Program.cs |    23 +-
 .../CreateStiffnessPoints.sln                 |    25 +
 .../Parse.cs                                  |    30 +
 .../PointLocation.txt                         |     6 +
 ... example - Stiffness Point from CSV.csproj |    24 +
 .../Program.cs                                |    38 +
 .../Example 5 - Using custom sections.gh      |   Bin 47115 -> 52320 bytes
 .../Example 5 - my example section.struxml    | 90372 +---------------
 FemDesign.Grasshopper/Bars/BarsBeam.cs        |    15 +-
 FemDesign.Grasshopper/Bars/BarsColumn.cs      |    95 +-
 .../Bars/BarsConnectivityConstruct.cs         |    16 +-
 .../Bars/BarsConnectivityDefineSemiRigid.cs   |     6 +-
 FemDesign.Grasshopper/Bars/BarsModify.cs      |     3 +-
 FemDesign.Grasshopper/Bars/BarsTruss.cs       |    14 +-
 .../Bars/BarsTrussLimitedCapacity.cs          |     2 +-
 .../Bars/OBSOLETE/BarsBeam_OBSOLETE.cs        |   130 +
 .../Bars/OBSOLETE/BarsColumn_OBSOLETE.cs      |   131 +
 .../Bars/OBSOLETE/BarsTruss_OBSOLETE.cs       |   111 +
 .../Calculate/ApplicationRunAnalysis.cs       |     2 +-
 .../ConstructionStages/ActivatedLoadCase.cs   |    21 +-
 .../ConstructionStages/Stage.cs               |     6 +-
 .../Deconstruct/LineStressLoadDeconstruct.cs  |    57 +
 .../Deconstruct/LoadCombinationDeconstruct.cs |    71 +-
 .../Deconstruct/StagesDeconstruct.cs          |    16 +-
 .../Deconstruct/SupportDeconstuctor.cs        |     4 +-
 .../FemDesign.Grasshopper.csproj              |    70 +-
 FemDesign.Grasshopper/Info/Info.cs            |     2 +-
 .../Loads/LineStressLoadDefine.cs             |    79 +
 .../Loads/LoadCombinationConstruct.cs         |   278 +-
 .../Loads/LoadCombinationSetupCalculation.cs  |     2 +-
 .../Loads/LoadGroupConstruct.cs               |     2 +-
 .../MaterialGetMaterialByNameOBSOLETE2.cs     |     2 +-
 .../LoadCombinationConstructOBSOLETE.cs       |    82 +
 .../LoadCombinationDeconstructOBSOLETE.cs     |    72 +
 .../Properties/Resources.Designer.cs          |    50 +
 .../Properties/Resources.resx                 |    15 +
 .../icons/LineStressLoadConstruct.png         |   Bin 0 -> 614 bytes
 .../icons/LineStressLoadDeconstruct.png       |   Bin 0 -> 1017 bytes
 .../Resources/icons/StagesDeconstruct.png     |   Bin 0 -> 12586 bytes
 .../Resources/icons/StiffnessPoint.png        |   Bin 0 -> 992 bytes
 .../Resources/icons/deconstruct_icon.png      |   Bin 0 -> 10449 bytes
 .../OBSOLETE/SectionDefineOBSOLETE.cs         |   115 +
 .../Sections/SectionDatabaseSave.cs           |     2 +-
 .../Sections/SectionDefine.cs                 |    36 +-
 .../SlabPlateConstruct_OBSOLETE.cs}           |    11 +-
 .../Shells/OBSOLETE/SlabWall_OBSOLETE.cs      |   126 +
 FemDesign.Grasshopper/Shells/SlabPlate.cs     |   127 +
 FemDesign.Grasshopper/Shells/SlabWall.cs      |     8 +-
 .../Supports/StiffnessPoints.cs               |    61 +
 FemDesign.Tests/Bars/BarTests.cs              |   178 +
 ...eateElements.cs => CreateElementsTests.cs} |     2 +-
 .../Entities/StiffnessPointsTests.cs          |    36 +
 FemDesign.Tests/FemDesign.Tests.csproj        |    10 +-
 .../GenericClasses/EnumHelpersTests.cs        |    12 +
 FemDesign.Tests/Geometry/RegionTest.cs        |     5 +-
 .../Loads/Load combination case types.struxml |   440 +
 FemDesign.Tests/Loads/LoadCombinationTests.cs |   108 +
 ...amGeneration.cs => BeamGenerationTests.cs} |     2 +-
 femdesign-api.sln                             |     9 +
 185 files changed, 4224 insertions(+), 91565 deletions(-)
 create mode 100644 FemDesign.Core/Bars/BarStiffnessFactors.cs
 create mode 100644 FemDesign.Core/GenericClasses/INamedEntity.cs
 create mode 100644 FemDesign.Core/GenericClasses/NamedEntityBase.cs
 create mode 100644 FemDesign.Core/Loads/LoadCombinationCaseBase.cs
 create mode 100644 FemDesign.Core/Loads/StageLoadCase.cs
 create mode 100644 FemDesign.Core/Releases/RigidityDataType0.cs
 create mode 100644 FemDesign.Core/Shells/SlabStiffnessFactors.cs
 create mode 100644 FemDesign.Core/Supports/StiffnessPoints.cs
 create mode 100644 FemDesign.Dynamo/Dynamo/GenericClasses/NamedEntityBase.cs
 rename FemDesign.Dynamo/Dynamo/Geometry/{FdCoordinateSystem.cs => CoordinateSystem.cs} (54%)
 rename FemDesign.Dynamo/Dynamo/Geometry/{FdPoint2d.cs => Point2d.cs} (84%)
 rename FemDesign.Dynamo/Dynamo/Geometry/{FdPoint3d.cs => Point3d.cs} (76%)
 rename FemDesign.Dynamo/Dynamo/Geometry/{FdVector2d.cs => Vector2d.cs} (84%)
 rename FemDesign.Dynamo/Dynamo/Geometry/{FdVector3d.cs => Vector3d.cs} (76%)
 create mode 100644 FemDesign.Dynamo/Dynamo/Results/PointSupportReactionMinMax.cs
 create mode 100644 FemDesign.Dynamo/Dynamo/Stage/ActivatedLoadCase.cs
 create mode 100644 FemDesign.Dynamo/Dynamo/Stage/ConstructionStages.cs
 create mode 100644 FemDesign.Dynamo/Dynamo/Stage/Stage.cs
 create mode 100644 FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/CreateStiffnessPoints.sln
 create mode 100644 FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/Parse.cs
 create mode 100644 FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/PointLocation.txt
 create mode 100644 FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/Practical example - Stiffness Point from CSV.csproj
 create mode 100644 FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/Program.cs
 create mode 100644 FemDesign.Grasshopper/Bars/OBSOLETE/BarsBeam_OBSOLETE.cs
 create mode 100644 FemDesign.Grasshopper/Bars/OBSOLETE/BarsColumn_OBSOLETE.cs
 create mode 100644 FemDesign.Grasshopper/Bars/OBSOLETE/BarsTruss_OBSOLETE.cs
 create mode 100644 FemDesign.Grasshopper/Deconstruct/LineStressLoadDeconstruct.cs
 create mode 100644 FemDesign.Grasshopper/Loads/LineStressLoadDefine.cs
 create mode 100644 FemDesign.Grasshopper/Obsolete/LoadCombinationConstructOBSOLETE.cs
 create mode 100644 FemDesign.Grasshopper/Obsolete/LoadCombinationDeconstructOBSOLETE.cs
 create mode 100644 FemDesign.Grasshopper/Resources/icons/LineStressLoadConstruct.png
 create mode 100644 FemDesign.Grasshopper/Resources/icons/LineStressLoadDeconstruct.png
 create mode 100644 FemDesign.Grasshopper/Resources/icons/StagesDeconstruct.png
 create mode 100644 FemDesign.Grasshopper/Resources/icons/StiffnessPoint.png
 create mode 100644 FemDesign.Grasshopper/Resources/icons/deconstruct_icon.png
 create mode 100644 FemDesign.Grasshopper/Sections/OBSOLETE/SectionDefineOBSOLETE.cs
 rename FemDesign.Grasshopper/Shells/{SlabPlateConstruct.cs => OBSOLETE/SlabPlateConstruct_OBSOLETE.cs} (91%)
 create mode 100644 FemDesign.Grasshopper/Shells/OBSOLETE/SlabWall_OBSOLETE.cs
 create mode 100644 FemDesign.Grasshopper/Shells/SlabPlate.cs
 create mode 100644 FemDesign.Grasshopper/Supports/StiffnessPoints.cs
 create mode 100644 FemDesign.Tests/Bars/BarTests.cs
 rename FemDesign.Tests/Bars/{CreateElements.cs => CreateElementsTests.cs} (99%)
 create mode 100644 FemDesign.Tests/Entities/StiffnessPointsTests.cs
 create mode 100644 FemDesign.Tests/Loads/Load combination case types.struxml
 create mode 100644 FemDesign.Tests/Loads/LoadCombinationTests.cs
 rename FemDesign.Tests/Performance/{BeamGeneration.cs => BeamGenerationTests.cs} (98%)

diff --git a/FemDesign.Core/AdvancedFem/Cover.cs b/FemDesign.Core/AdvancedFem/Cover.cs
index f0ceb8764..d3eac3092 100644
--- a/FemDesign.Core/AdvancedFem/Cover.cs
+++ b/FemDesign.Core/AdvancedFem/Cover.cs
@@ -11,32 +11,14 @@ namespace FemDesign
     /// cover_type
     /// </summary>
     [System.Serializable]
-    public partial class Cover: EntityBase, IStructureElement
+    public partial class Cover: NamedEntityBase, IStructureElement
     {
         /// <summary>
         /// Cover instance number
         /// </summary>
         private static int _coverInstance = 0;
-        
-        /// <summary>
-        /// Identifier
-        /// </summary>
-        [XmlAttribute("name")]
-        public string _name;
-        [XmlIgnore]
-        public string Name
-        {
-            get
-            {
-                return this._name;
-            }
-            set
-            {
-                Cover._coverInstance++;
-                this._name = value + "." + Cover._coverInstance.ToString();
-            }
-        }
-        
+        protected override int GetUniqueInstanceCount() => ++_coverInstance;
+
         /// <summary>
         /// Load bearing direction (point_type_3d)
         /// </summary>
@@ -69,10 +51,11 @@ private Cover()
         /// <param name="region">Region of cover.</param>
         /// <param name="supportingStructures">Guidlist of supporting structure.</param>
         /// <param name="loadBearingDirection">Vector, if null a TwoWay cover is defined.</param>
+        /// <param name="identifier">Name.</param>
         public Cover(Geometry.Region region, CoverReferenceList supportingStructures, Geometry.Vector3d loadBearingDirection, string identifier)
         {
             this.EntityCreated();
-            this.Name = identifier;
+            this.Identifier = identifier;
             this.Region = region;
             this.SupportingStructures = supportingStructures;
             this.LoadBearingDirection = loadBearingDirection;
diff --git a/FemDesign.Core/AuxiliaryResults/LabelledSection.cs b/FemDesign.Core/AuxiliaryResults/LabelledSection.cs
index 2f6820d3e..c2672b104 100644
--- a/FemDesign.Core/AuxiliaryResults/LabelledSection.cs
+++ b/FemDesign.Core/AuxiliaryResults/LabelledSection.cs
@@ -12,11 +12,13 @@ namespace FemDesign.AuxiliaryResults
     /// Labelled section. Used for extracting detailed results along a section line or polyline.
     /// </summary>
     [System.Serializable]
-    public partial class LabelledSection : EntityBase, IStructureElement
+    public partial class LabelledSection : NamedEntityBase, IStructureElement
     {
         [XmlIgnore]
-        private static int instances = 0;
-        public static void ResetInstanceCount() => instances = 0;
+        private static int _labelledSectioninstances = 0;
+        public static void ResetInstanceCount() => _labelledSectioninstances = 0;
+        protected override int GetUniqueInstanceCount() => ++_labelledSectioninstances;
+
         [XmlElement("line_segment")]
         public LineSegment _lineSegment;
         [XmlElement("polyline")]
@@ -51,12 +53,6 @@ public List<Point3d> Verticies {
                     throw new ArgumentException($"LabelledSection must have at least 2 verticies.");
             }
         }
-
-        /// <summary>
-        /// Identifier
-        /// </summary>
-        [XmlAttribute("name")]
-        public string Name { get; set; }
         
         /// <summary>
         /// Parameterless contructor for serialization
@@ -81,11 +77,10 @@ public LabelledSection(string identifier = "LS", params Point3d[] verticies)
 
         private void Initialize(List<Point3d> verticies, string identifier)
         {
-            instances++;
             this.EntityCreated();
 
             Verticies = verticies;
-            Name = $"{identifier}.{instances}";
+            Identifier = identifier;
         }
     }
 }
diff --git a/FemDesign.Core/Bars/Bar.cs b/FemDesign.Core/Bars/Bar.cs
index 409229265..866ab4ea3 100644
--- a/FemDesign.Core/Bars/Bar.cs
+++ b/FemDesign.Core/Bars/Bar.cs
@@ -1,6 +1,8 @@
 // https://strusoft.com/
+using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Text.RegularExpressions;
 using System.Xml.Serialization;
 using FemDesign.GenericClasses;
 
@@ -17,15 +19,8 @@ namespace FemDesign.Bars
     [XmlInclude(typeof(Truss))]
     [XmlRoot("database", Namespace = "urn:strusoft")]
     [System.Serializable]
-    public partial class Bar : EntityBase, IStructureElement, IStageElement
+    public partial class Bar : EntityBase, INamedEntity, IStructureElement, IStageElement
     {
-        [XmlIgnore]
-        private static int _barInstance = 0; // used for counter of name)
-        [XmlIgnore]
-        private static int _columnInstance = 0; // used for counter of name
-        [XmlIgnore]
-        private static int _trussInstance = 0; // used for counter of name
-
         /// <summary>
         /// Truss only.
         /// </summary>enum
@@ -63,86 +58,10 @@ public double MaxTension
         [XmlAttribute("tensions_plasticity")]
         public bool TensionPlasticity { get; set; } // bool
 
-        [XmlAttribute("name")]
-        public string _name { get; set; } // identifier
-
-        [XmlIgnore]
-        public string Name
-        {
-            get
-            {
-                return this._name;
-            }
-            set
-            {
-                if (this.Type == BarType.Beam)
-                {
-                    Bar._barInstance++;
-                    this._name = value + "." + Bar._barInstance.ToString();
-
-                    // update barpart identifier
-                    if (this.BarPart != null)
-                    {
-                        this.BarPart.Name = this._name;
-                    }
-                }
-                else if (this.Type == BarType.Column)
-                {
-                    Bar._columnInstance++;
-                    this._name = value + "." + Bar._columnInstance.ToString();
-
-                    // update barpart identifier
-                    if (this.BarPart != null)
-                    {
-                        this.BarPart.Name = this._name;
-                    }
-                }
-                else if (this.Type == BarType.Truss)
-                {
-                    Bar._trussInstance++;
-                    this._name = value + "." + Bar._trussInstance.ToString();
-
-                    // update barpart identifier
-                    if (this.BarPart != null)
-                    {
-                        this.BarPart.Name = this._name;
-                    }
-                }
-                else
-                {
-                    throw new System.ArgumentException($"Incorrect type of bar: {this.Type}");
-                }
-            }
-        }
 
-        [XmlIgnore]
-        public string Instance
-		{
-			get
-			{
-                var found = this._name.IndexOf(".");
-                return this._name.Substring(found + 1);
-			}
-		}
-        public string Identifier => this.Name.Split('.')[0];
 
         [XmlAttribute("type")]
-        public BarType _type; // beamtype
-
-        [XmlIgnore]
-        public BarType Type
-        {
-            get
-            {
-                return this._type;
-            }
-            set
-            {
-                this._type = value;
-            }
-            // get {return this._type;}
-            // set {this._type = RestrictedString.BeamType(value);}
-        }
+        public BarType Type { get; set; }
 
         [XmlAttribute("stage")]
         public int StageId { get; set; } = 1;
@@ -150,7 +69,10 @@ public BarType Type
         [XmlElement("bar_part", Order = 1)]
         public BarPart BarPart { get; set; } // bar_part_type
 
-        [XmlElement("end", Order = 2)]
+        [XmlElement("truss_behaviour", Order = 2)]
+        public StruSoft.Interop.StruXml.Data.Truss_chr_type TrussBehaviour { get; set; }
+
+        [XmlElement("end", Order = 3)]
         public string End = "";
 
         [XmlIgnore]
@@ -176,10 +98,26 @@ public List<Reinforcement.BarReinforcement> LongitudinalBars
             }
         }
 
+        public string Name => this.BarPart.Name.Substring(0, this.BarPart.Name.Length - 2); // Remove trailing ".1" from barpart name
+        public int Instance => this.BarPart.Instance;
+
+        [XmlIgnore]
+        public string Identifier
+        {
+            get => this.BarPart.Identifier;
+            set => this.BarPart.Identifier = value;
+        }
+        [XmlIgnore]
+        public bool LockedIdentifier
+        {
+            get => this.BarPart.LockedIdentifier;
+            set => this.BarPart.LockedIdentifier = value;
+        }
+
         /// <summary>
         /// Parameterless constructor for serialization.
         /// </summary>
-        internal Bar()
+        protected Bar()
         {
 
         }
@@ -194,17 +132,17 @@ internal Bar()
         /// <param name="eccentricity">Analytical eccentricity, same at start. Eccentricity set to 0,0 if null/end</param>
         /// <param name="connectivity">Connectivity, same at start/end. Connectivity set to Rigid if null</param>
         /// <param name="identifier">Identifier</param>
-        public Bar(Geometry.Edge edge, Materials.Material material, Sections.Section section, BarType type = BarType.Beam, Eccentricity eccentricity = null, Connectivity connectivity = null, string identifier = "B")
+        public Bar(Geometry.Edge edge, Materials.Material material, Sections.Section section, BarType type, Eccentricity eccentricity = null, Connectivity connectivity = null, string identifier = "B")
         {
-            if(type == BarType.Truss) { throw new System.Exception("Truss is not a valid type"); }
-            
+            if (type == BarType.Truss) { throw new System.Exception("Truss is not a valid type"); }
+
             this.EntityCreated();
             this.Type = type;
-            this.Name = identifier;
+            //this.Identifier = identifier;
 
-            if(eccentricity == null) { eccentricity = Eccentricity.Default; }
-            if(connectivity == null) { connectivity = Connectivity.Default; }
-            this.BarPart = new BarPart(edge, this.Type, material, section, eccentricity, connectivity, this.Name);
+            if (eccentricity == null) { eccentricity = Eccentricity.Default; }
+            if (connectivity == null) { connectivity = Connectivity.Default; }
+            this.BarPart = new BarPart(edge, this.Type, material, section, eccentricity, connectivity, identifier);
         }
 
         /// <summary>
@@ -221,7 +159,7 @@ public Bar(Geometry.Edge edge, Materials.Material material, Sections.Section sec
         /// <param name="startConnectivity">Connectivity. Connectivity set to Rigid if null/end</param>
         /// <param name="endConnectivity">Connectivity. Connectivity set to Rigid if null</param>
         /// <param name="identifier">Identifier</param>
-        public Bar(FemDesign.Geometry.Point3d startPoint, FemDesign.Geometry.Point3d endPoint, Materials.Material material, Sections.Section section, BarType type = BarType.Beam, Geometry.Vector3d localY = null, Eccentricity startEccentricity = null, Eccentricity endEccentricity = null, Connectivity startConnectivity = null, Connectivity endConnectivity = null, string identifier = "B")
+        public Bar(FemDesign.Geometry.Point3d startPoint, FemDesign.Geometry.Point3d endPoint, Materials.Material material, Sections.Section section, BarType type, Geometry.Vector3d localY = null, Eccentricity startEccentricity = null, Eccentricity endEccentricity = null, Connectivity startConnectivity = null, Connectivity endConnectivity = null, string identifier = "B")
         {
             var orientY = localY ?? (endPoint - startPoint).Cross(Geometry.Vector3d.UnitZ);
             Geometry.Edge edge = new Geometry.Edge(startPoint, endPoint, orientY);
@@ -229,14 +167,14 @@ public Bar(FemDesign.Geometry.Point3d startPoint, FemDesign.Geometry.Point3d end
 
             this.EntityCreated();
             this.Type = type;
-            this.Name = identifier;
+            //this.Identifier = identifier;
 
             if (startEccentricity == null) { startEccentricity = Eccentricity.Default; }
             if (endEccentricity == null) { endEccentricity = Eccentricity.Default; }
             if (startConnectivity == null) { startConnectivity = Connectivity.Default; }
             if (endConnectivity == null) { endConnectivity = Connectivity.Default; }
 
-            this.BarPart = new BarPart(edge, this.Type, material, section, startEccentricity, endEccentricity, startConnectivity, endConnectivity, this.Name);
+            this.BarPart = new BarPart(edge, this.Type, material, section, startEccentricity, endEccentricity, startConnectivity, endConnectivity, identifier);
         }
 
 
@@ -264,10 +202,10 @@ public Bar(Geometry.Edge edge, BarType type, Materials.Material material, Sectio
 
             this.EntityCreated();
             this.Type = type;
-            this.Name = identifier;
+            //this.Identifier = identifier;
 
 
-            this.BarPart = new BarPart(edge, this.Type, material, section, startEccentricity, endEccentricity, startConnectivity, endConnectivity, this.Name);
+            this.BarPart = new BarPart(edge, this.Type, material, section, startEccentricity, endEccentricity, startConnectivity, endConnectivity, identifier);
         }
 
         /// <summary>
@@ -289,8 +227,8 @@ public Bar(Geometry.Edge edge, BarType type, Materials.Material material, Sectio
 
             this.EntityCreated();
             this.Type = type;
-            this.Name = identifier;
-            this.BarPart = new BarPart(edge, this.Type, material, startSection, endSection, startEccentricity, endEccentricity, startConnectivity, endConnectivity, this.Name);
+            //this.Identifier = identifier;
+            this.BarPart = new BarPart(edge, this.Type, material, startSection, endSection, startEccentricity, endEccentricity, startConnectivity, endConnectivity, identifier);
         }
 
 
@@ -310,8 +248,8 @@ public Bar(Geometry.Edge edge, BarType type, Materials.Material material, Sectio
 
             this.EntityCreated();
             this.Type = type;
-            this.Name = identifier;
-            this.BarPart = new BarPart(edge, this.Type, material, sections, eccentricities, connectivities, this.Name);
+            //this.Identifier = identifier;
+            this.BarPart = new BarPart(edge, this.Type, material, sections, eccentricities, connectivities, identifier);
         }
 
         /// <summary>
@@ -332,8 +270,8 @@ public Bar(Geometry.Edge edge, BarType type, Materials.Material material, Sectio
 
             this.EntityCreated();
             this.Type = type;
-            this.Name = identifier;
-            this.BarPart = new BarPart(edge, this.Type, material, sections, positions, eccentricities, startConnectivity, endConnectivity, this.Name);
+            //this.Identifier = identifier;
+            this.BarPart = new BarPart(edge, this.Type, material, sections, positions, eccentricities, startConnectivity, endConnectivity, identifier);
         }
 
 
@@ -349,10 +287,34 @@ public Bar(Geometry.Edge edge, Materials.Material material, Sections.Section sec
         {
             this.EntityCreated();
             this.Type = BarType.Truss;
-            this.Name = identifier;
+            //this.Identifier = identifier;
             this.BarPart = new BarPart(edge, this.Type, material, section, identifier);
         }
 
+
+
+        /// <summary>
+        /// Construct a truss element.
+        /// </summary>
+        /// <param name="edge"></param>
+        /// <param name="material"></param>
+        /// <param name="section"></param>
+        /// <param name="identifier"></param>
+        /// <exception cref="System.Exception"></exception>
+        public static Bar Truss(Geometry.Edge edge, Materials.Material material, Sections.Section section, string identifier)
+        {
+            var truss = new Bar();
+
+            truss.EntityCreated();
+            truss.Type = BarType.Truss;
+            //truss.Identifier = identifier;
+            truss.BarPart = new BarPart(edge, truss.Type, material, section, identifier);
+            return truss;
+        }
+
+
+
+
         /// Update entities if this bar should be "reconstructed"
         public void UpdateEntities()
         {
@@ -371,10 +333,10 @@ public void UpdateEntities()
 
         public override string ToString()
         {
-            if(this.Type == BarType.Beam || this.Type == BarType.Column)
+            if (this.Type == BarType.Beam || this.Type == BarType.Column)
                 return $"{this.Type} Start: {this.BarPart.Edge.Points.First()}, End: {this.BarPart.Edge.Points.Last()}, Length: {this.BarPart.Edge.Length} m, Sections: ({this.BarPart.ComplexSectionObj.Sections.First()._sectionName}, {this.BarPart.ComplexSectionObj.Sections.Last()._sectionName}), Material: {this.BarPart.ComplexMaterialObj}";
 
-            else if(this.Type == BarType.Truss)
+            else if (this.Type == BarType.Truss)
             {
                 return $"{this.Type} Start: {this.BarPart.Edge.Points.First()}, End: {this.BarPart.Edge.Points.Last()}, Length: {this.BarPart.Edge.Length} m, Section: {this.BarPart.TrussUniformSectionObj._sectionName}, Material: {this.BarPart.ComplexMaterialObj}";
             }
diff --git a/FemDesign.Core/Bars/BarPart.cs b/FemDesign.Core/Bars/BarPart.cs
index d154e2c42..0f7c85a85 100644
--- a/FemDesign.Core/Bars/BarPart.cs
+++ b/FemDesign.Core/Bars/BarPart.cs
@@ -2,7 +2,9 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Xml;
 using System.Xml.Serialization;
+using System.ComponentModel;
 
 using FemDesign.GenericClasses;
 
@@ -14,8 +16,28 @@ namespace FemDesign.Bars
     /// Underlying representation of a Bar-element.
     /// </summary>
     [System.Serializable]
-    public partial class BarPart : EntityBase, IStageElement
+    public partial class BarPart : NamedEntityPartBase, IStageElement
     {
+        [XmlIgnore]
+        private static int _barInstance = 0; // Number of bar/beam instances created
+        [XmlIgnore]
+        private static int _columnInstance = 0; // Number of column instances created
+        [XmlIgnore]
+        private static int _trussInstance = 0; // Number of truss instances created
+        protected override int GetUniqueInstanceCount()
+        {
+            switch (this.Type)
+            {
+                case BarType.Beam:
+                    return ++_barInstance;
+                case BarType.Column:
+                    return ++_columnInstance;
+                case BarType.Truss:
+                    return ++_trussInstance;
+                default:
+                    throw new System.ArgumentException($"Incorrect type of bar: {this.Type}");
+            }
+        }
         /// <summary>
         /// Edge field
         /// </summary>
@@ -158,47 +180,15 @@ public Geometry.Vector3d LocalZ
             }
         }
 
-        /// <summary>
-        /// Identifier field
-        /// </summary>
-        [XmlAttribute("name")]
-        public string _name;
-
-        /// <summary>
-        /// Identifier property
-        /// </summary>
-        [XmlIgnore]
-        public string Name
-        {
-            get
-            {
-                return this._name;
-            }
-            set
-            {
-                this._name = value + ".1";
-            }
-        }
-        [XmlIgnore]
-        public string Instance
-        {
-            get
-            {
-                var found = this._name.IndexOf(".");
-                return this._name.Substring(found + 1);
-            }
-        }
-        public string Identifier => this.Name.Split('.')[0];
-
         [XmlIgnore]
-        public BarType Type { get; set; }
+        public BarType Type;
 
         [XmlIgnore]
         public SectionType SectionType
         {
             get
             {
-                if(this.Type == BarType.Truss)
+                if (this.Type == BarType.Truss)
                 {
                     return SectionType.Truss;
                 }
@@ -206,11 +196,11 @@ public SectionType SectionType
                 {
                     return SectionType.RegularBeamColumn;
                 }
-                else if(this.Type != BarType.Truss && this.HasComplexCompositeRef)
+                else if (this.Type != BarType.Truss && this.HasComplexCompositeRef)
                 {
                     return SectionType.CompositeBeamColumn;
                 }
-                else if(this.Type != BarType.Truss && this.HasComplexSectionRef && this.HasDeltaBeamComplexSectionRef)
+                else if (this.Type != BarType.Truss && this.HasComplexSectionRef && this.HasDeltaBeamComplexSectionRef)
                 {
                     return SectionType.DeltaBeamColumn;
                 }
@@ -306,7 +296,7 @@ public string ComplexSectionRef
                         this._complexSectionRef = r;
                         return r;
                     }
-                    
+
                 }
             }
             set
@@ -455,9 +445,36 @@ public Eccentricity[] AnalyticalEccentricity
         }
         [XmlElement("buckling_data", Order = 5)]
         public Buckling.BucklingData BucklingData { get; set; } // buckling_data_type
-        [XmlElement("end", Order = 6)]
+
+        [XmlElement("camber_type_2d", Order = 6)]
+        public StruSoft.Interop.StruXml.Data.Camber_type_2d CamberType2d { get; set; }
+
+        [XmlElement("stiffness_modifiers", Order = 7)]
+        public BarStiffnessFactors BarStiffnessFactors { get; set; }
+
+        [XmlElement("end", Order = 8)]
         public string End = "";
 
+        [XmlAttribute("ecc_crack")]
+        [DefaultValue(false)]
+        public bool EccCrack { get; set; }
+
+        [XmlAttribute("first_order_analysis_U")]
+        [DefaultValue(false)]
+        public bool FirstOrderAnalysisU { get; set; }
+
+        [XmlAttribute("first_order_analysis_Sq")]
+        [DefaultValue(false)]
+        public bool FirstOrderAnalysisSq { get; set; }
+
+        [XmlAttribute("first_order_analysis_Sf")]
+        [DefaultValue(false)]
+        public bool FirstOrderAnalysisSf { get; set; }
+
+        [XmlAttribute("first_order_analysis_Sc")]
+        [DefaultValue(false)]
+        public bool FirstOrderAnalysisSc { get; set; }
+
         /// <summary>
         /// Parameterless constructor for serialization.
         /// </summary>
@@ -484,7 +501,7 @@ public BarPart(Geometry.Edge edge, BarType type, Materials.Material material, Se
                 this.ComplexSectionObj = new Sections.ComplexSection(section, eccentricity);
                 this.Connectivity = new Connectivity[1] { connectivity };
                 this.EccentricityCalc = true;
-                this.Name = identifier;
+                this.Identifier = identifier;
             }
         }
 
@@ -506,7 +523,7 @@ public BarPart(Geometry.Edge edge, BarType type, Materials.Material material, Se
                 this.ComplexSectionObj = new Sections.ComplexSection(section, section, startEccentricity, endEccentricity);
                 this.Connectivity = new Connectivity[2] { startConnectivity, endConnectivity };
                 this.EccentricityCalc = true;
-                this.Name = identifier;
+                this.Identifier = identifier;
             }
         }
 
@@ -528,7 +545,7 @@ public BarPart(Geometry.Edge edge, BarType type, Materials.Material material, Se
                 this.ComplexSectionObj = new Sections.ComplexSection(startSection, endSection, startEccentricity, endEccentricity);
                 this.Connectivity = new Connectivity[2] { startConnectivity, endConnectivity };
                 this.EccentricityCalc = true;
-                this.Name = identifier;
+                this.Identifier = identifier;
             }
         }
 
@@ -550,7 +567,7 @@ public BarPart(Geometry.Edge edge, BarType type, Materials.Material material, Se
                 this.ComplexSectionObj = new Sections.ComplexSection(sections, eccentricities);
                 this.Connectivity = connectivities;
                 this.EccentricityCalc = true;
-                this.Name = identifier;
+                this.Identifier = identifier;
             }
         }
 
@@ -572,13 +589,13 @@ public BarPart(Geometry.Edge edge, BarType type, Materials.Material material, Se
                 this.ComplexSectionObj = new Sections.ComplexSection(sections, positions, eccentricities);
                 this.Connectivity = new Connectivity[2] { startConnectivity, endConnectivity };
                 this.EccentricityCalc = true;
-                this.Name = identifier;
+                this.Identifier = identifier;
             }
         }
 
         /// <summary>
         /// Construct BarPart (truss)
-        /// <summary>
+        /// </summary>
         public BarPart(Geometry.Edge edge, BarType type, Materials.Material material, Sections.Section section, string identifier)
         {
             if (type != BarType.Truss)
@@ -592,13 +609,13 @@ public BarPart(Geometry.Edge edge, BarType type, Materials.Material material, Se
                 this.Edge = edge;
                 this.ComplexMaterialObj = material;
                 this.TrussUniformSectionObj = section;
-                this.Name = identifier;
+                this.Identifier = identifier;
             }
         }
 
         /// <summary>
         /// Orient this object's coordinate system to GCS
-        /// <summary>
+        /// </summary>
         public void OrientCoordinateSystemToGCS()
         {
             var cs = this.CoordinateSystem;
diff --git a/FemDesign.Core/Bars/BarStiffnessFactors.cs b/FemDesign.Core/Bars/BarStiffnessFactors.cs
new file mode 100644
index 000000000..6e169ce1c
--- /dev/null
+++ b/FemDesign.Core/Bars/BarStiffnessFactors.cs
@@ -0,0 +1,44 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using System.Xml.Serialization;
+
+namespace FemDesign.Bars
+{
+    public partial class BarStiffnessFactors
+    {
+        //[XmlElement("stiffness_modifiers", Order = 1)]
+        //public List<StruSoft.Interop.StruXml.Data.Bar_stiffness_factor_record> Stiffness_modifiers
+        //{
+        //    get
+        //    {
+        //        if (_stiffness_modifiers == null)
+        //            return null;
+        //        else if (_stiffness_modifiers.Count == 0)
+        //            return null;
+        //        else
+        //            return _stiffness_modifiers;
+        //    }
+        //    set
+        //    {
+        //        if (value == null)
+        //            _stiffness_modifiers = null;
+        //        else if (value.Count == 0)
+        //            _stiffness_modifiers = null;
+        //        else
+        //            _stiffness_modifiers = value;
+        //    }
+        //}
+
+        //[XmlIgnore]
+        //public List<StruSoft.Interop.StruXml.Data.Bar_stiffness_factor_record> _stiffness_modifiers;
+
+
+        [XmlElement("factors", Order = 1)]
+        public List<StruSoft.Interop.StruXml.Data.Bar_stiffness_factor_record> StiffnessModifiers { get; set; }
+
+    }
+}
diff --git a/FemDesign.Core/Bars/Connectivity.cs b/FemDesign.Core/Bars/Connectivity.cs
index 99363daf3..9ca9a0ea0 100644
--- a/FemDesign.Core/Bars/Connectivity.cs
+++ b/FemDesign.Core/Bars/Connectivity.cs
@@ -19,7 +19,7 @@ public partial class Connectivity
         // binary-rigid
         /// <summary>Translation local-x axis.</summary>
         [XmlAttribute("m_x")]
-        public bool Mx
+        public bool Tx
         {
             get
             {
@@ -35,7 +35,7 @@ public bool Mx
 
         /// <summary>Translation local-y axis. </summary>
         [XmlAttribute("m_y")]
-        public bool My
+        public bool Ty
         {
             get
             {
@@ -52,7 +52,7 @@ public bool My
 
         /// <summary>Translation local-z axis.</summary>
         [XmlAttribute("m_z")]
-        public bool Mz
+        public bool Tz
         {
             get
             {
@@ -119,7 +119,7 @@ public bool Rz
         [XmlAttribute("m_x_release")]
         public double _mxRelease; // non_neg_max_1e10. Default = 0. Valid only if m_x is false.
         [XmlIgnore]
-        public double MxRelease
+        public double TxRelease
         {
             get
             {
@@ -133,7 +133,7 @@ public double MxRelease
         [XmlAttribute("m_y_release")]
         public double _myRelease; // non_neg_max_1e10. Default = 0. Valid only if m_y is false.
         [XmlIgnore]
-        public double MyRelease
+        public double TyRelease
         {
             get
             {
@@ -147,7 +147,7 @@ public double MyRelease
         [XmlAttribute("m_z_release")]
         public double _mzRelease; // non_neg_max_1e10. Default = 0. Valid only if m_z is false.
         [XmlIgnore]
-        public double MzRelease
+        public double TzRelease
         {
             get
             {
@@ -205,7 +205,7 @@ public bool IsRigid
         {
             get
             {
-                if(this.Mx && this.My && this.Mz && this.Rx && this.Ry && this.Rz)
+                if(this.Tx && this.Ty && this.Tz && this.Rx && this.Ry && this.Rz)
                     return true;
                 else
                     return false;
@@ -216,7 +216,7 @@ public bool IsHinged
         {
             get
             {
-                if (this.Mx && this.My && this.Mz && this.Rx && this.Ry == false && this.Rz == false)
+                if (this.Tx && this.Ty && this.Tz && this.Rx && this.Ry == false && this.Rz == false)
                     return true;
                 else
                     return false;
@@ -234,17 +234,17 @@ private Connectivity()
         /// <summary>
         /// Private constructor for binary-rigid definition.
         /// </summary>
-        /// <param name="mx"></param>
-        /// <param name="my"></param>
-        /// <param name="mz"></param>
+        /// <param name="tx"></param>
+        /// <param name="ty"></param>
+        /// <param name="tz"></param>
         /// <param name="rx"></param>
         /// <param name="ry"></param>
         /// <param name="rz"></param>
-        public Connectivity(bool mx, bool my, bool mz, bool rx, bool ry, bool rz)
+        public Connectivity(bool tx, bool ty, bool tz, bool rx, bool ry, bool rz)
         {
-            this.Mx = mx;
-            this.My = my;
-            this.Mz = mz;
+            this.Tx = tx;
+            this.Ty = ty;
+            this.Tz = tz;
             this.Rx = rx;
             this.Ry = ry;
             this.Rz = rz;
@@ -253,29 +253,29 @@ public Connectivity(bool mx, bool my, bool mz, bool rx, bool ry, bool rz)
         /// <summary>
         /// Private constructor for semi-rigid definition.
         /// </summary>
-        /// <param name="mx"></param>
-        /// <param name="my"></param>
-        /// <param name="mz"></param>
+        /// <param name="tx"></param>
+        /// <param name="ty"></param>
+        /// <param name="tz"></param>
         /// <param name="rx"></param>
         /// <param name="ry"></param>
         /// <param name="rz"></param>
-        /// <param name="mxRelease"></param>
-        /// <param name="myRelease"></param>
-        /// <param name="mzRelease"></param>
+        /// <param name="txRelease"></param>
+        /// <param name="tyRelease"></param>
+        /// <param name="tzRelease"></param>
         /// <param name="rxRelease"></param>
         /// <param name="ryRelease"></param>
         /// <param name="rzRelease"></param>
-        public Connectivity(bool mx, bool my, bool mz, bool rx, bool ry, bool rz, double mxRelease, double myRelease, double mzRelease, double rxRelease, double ryRelease, double rzRelease)
+        public Connectivity(bool tx, bool ty, bool tz, bool rx, bool ry, bool rz, double txRelease, double tyRelease, double tzRelease, double rxRelease, double ryRelease, double rzRelease)
         {
-            this.Mx = mx;
-            this.My = my;
-            this.Mz = mz;
+            this.Tx = tx;
+            this.Ty = ty;
+            this.Tz = tz;
             this.Rx = rx;
             this.Ry = ry;
             this.Rz = rz;
-            this.MxRelease = mxRelease;
-            this.MyRelease = myRelease;
-            this.MzRelease = mzRelease;
+            this.TxRelease = txRelease;
+            this.TyRelease = tyRelease;
+            this.TzRelease = tzRelease;
             this.RxRelease = rxRelease;
             this.RyRelease = ryRelease;
             this.RzRelease = rzRelease;
@@ -321,7 +321,7 @@ public override string ToString()
             else if(IsHinged)
                 return $"{this.GetType().Name} Hinged";
             else
-                return $"{this.GetType().Name} Tx: {this.MxRelease} kN/m, Ty: {this.MyRelease} kN/m, Tz: {this.MzRelease} kN/m, Rx: {this.RxRelease} kNm/rad, Ry: {this.RyRelease} kNm/rad, Rz: {this.RzRelease} kNm/rad";
+                return $"{this.GetType().Name} Tx: {this.TxRelease} kN/m, Ty: {this.TyRelease} kN/m, Tz: {this.TzRelease} kN/m, Rx: {this.RxRelease} kNm/rad, Ry: {this.RyRelease} kNm/rad, Rz: {this.RzRelease} kNm/rad";
         }
     }
 }
\ No newline at end of file
diff --git a/FemDesign.Core/Bars/Eccentricity.cs b/FemDesign.Core/Bars/Eccentricity.cs
index e85245d77..f42853305 100644
--- a/FemDesign.Core/Bars/Eccentricity.cs
+++ b/FemDesign.Core/Bars/Eccentricity.cs
@@ -14,7 +14,7 @@ public partial class Eccentricity
     {
         /// <summary>
         /// Private field for eccentricity of local-x.
-        /// <summary>
+        /// </summary>
         [XmlAttribute("x")]
         public double _x;
 
@@ -138,8 +138,7 @@ public override int GetHashCode()
         public static Eccentricity Default => new Eccentricity(0, 0);
         public override string ToString()
         {
-            return $"{this.GetType().Name} Local-X: 0.00, Local-Y: {this.Y.ToString(FemDesign.TextFormatting.decimalRounding)}, Local-Z: {this.Z.ToString(FemDesign.TextFormatting.decimalRounding)}";
+            return $"{this.GetType().Name} Local-Y: {this.Y.ToString(FemDesign.TextFormatting.decimalRounding)}, Local-Z: {this.Z.ToString(FemDesign.TextFormatting.decimalRounding)}";
         }
-
     }
 }
\ No newline at end of file
diff --git a/FemDesign.Core/Calculate/Analysis.cs b/FemDesign.Core/Calculate/Analysis.cs
index eae4874a9..99d089d52 100644
--- a/FemDesign.Core/Calculate/Analysis.cs
+++ b/FemDesign.Core/Calculate/Analysis.cs
@@ -259,7 +259,7 @@ public static Analysis StaticAnalysis(Comb comb = null, bool calcCase = true, bo
         /// <param name="x">Consider masses in global x-direction.</param>
         /// <param name="y">Consider masses in global y-direction.</param>
         /// <param name="z">Consider masses in global z-direction.</param>
-        /// <param name="top">Top of substructure. Masses on this level and below are not considered in Eigenfrequency 
+        /// <param name="top">Top of substructure. Masses on this level and below are not considered in Eigenfrequency</param>
         /// <returns></returns>
         public static Analysis Eigenfrequencies(int numShapes = 3, int maxSturm = 0, bool x = true, bool y = true, bool z = true, double top = -0.01)
         {
diff --git a/FemDesign.Core/Calculate/Application.cs b/FemDesign.Core/Calculate/Application.cs
index 384850927..1867ffc7d 100644
--- a/FemDesign.Core/Calculate/Application.cs
+++ b/FemDesign.Core/Calculate/Application.cs
@@ -163,6 +163,7 @@ public void OpenStruxml(string struxmlPath, bool killProcess)
         /// <param name="fdScript"></param>
         /// <param name="killProcess"></param>
         /// <param name="endSession"></param>
+        /// <param name="checkOpenFiles"></param>
         /// <returns></returns>
         public bool RunFdScript(FdScript fdScript, bool killProcess, bool endSession, bool checkOpenFiles = true)
         {
diff --git a/FemDesign.Core/Calculate/FdScript.cs b/FemDesign.Core/Calculate/FdScript.cs
index 86fdca28d..ee2d42a31 100644
--- a/FemDesign.Core/Calculate/FdScript.cs
+++ b/FemDesign.Core/Calculate/FdScript.cs
@@ -245,6 +245,7 @@ public static FdScript CreateDocumentation(string strPath, string docxTemplatePa
             return fdScript;
         }
 
+        /// <summary>
         /// Create fdscript to open and extract results from a FEM-Design .str model.
         /// </summary>
         /// <param name="strPath">Path to model with results to be extracted.</param>
diff --git a/FemDesign.Core/Calculate/Stage.cs b/FemDesign.Core/Calculate/Stage.cs
index b37612eaa..1b5963765 100644
--- a/FemDesign.Core/Calculate/Stage.cs
+++ b/FemDesign.Core/Calculate/Stage.cs
@@ -16,12 +16,12 @@ public partial class Stage
         /// <summary>
         /// Parameterless constructor for serialization.
         /// </summary>
-        private Stage()
+        public Stage()
         {
             
         }
 
-        private Stage(bool ghost = false)
+        public Stage(bool ghost = false)
         {
             this._ghost = Convert.ToInt32(ghost);
         }
diff --git a/FemDesign.Core/FemDesign.Core.csproj b/FemDesign.Core/FemDesign.Core.csproj
index b5e5ae197..5fd5dd1e7 100644
--- a/FemDesign.Core/FemDesign.Core.csproj
+++ b/FemDesign.Core/FemDesign.Core.csproj
@@ -20,6 +20,7 @@
     <WarningLevel>4</WarningLevel>
     <Prefer32Bit>false</Prefer32Bit>
     <DocumentationFile>bin\Debug\FemDesign.Core.xml</DocumentationFile>
+    <NoWarn>CS1591</NoWarn>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>
@@ -46,17 +47,22 @@
     <Reference Include="System.Xml.Linq" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="Bars\BarStiffnessFactors.cs" />
     <Compile Include="Bars\Beam.cs" />
     <Compile Include="Bars\Column.cs" />
     <Compile Include="Bars\Truss.cs" />
     <Compile Include="Calculate\CmdApplyDesignChanges.cs" />
     <Compile Include="Calculate\CmdGlobalCfg.cs" />
+    <Compile Include="GenericClasses\INamedEntity.cs" />
     <Compile Include="GenericClasses\IStageElement.cs" />
+    <Compile Include="GenericClasses\NamedEntityBase.cs" />
     <Compile Include="GenericClasses\TextFormatting.cs" />
+    <Compile Include="Releases\RigidityDataType0.cs" />
     <Compile Include="Results\Node\PointSupportReactionMinMax.cs" />
     <Compile Include="Geometry\ArcEdge.cs" />
     <Compile Include="Geometry\CircleEdge.cs" />
     <Compile Include="Geometry\LineEdge.cs" />
+    <Compile Include="Shells\SlabStiffnessFactors.cs" />
     <Compile Include="Stage\ActivatedLoadCase.cs" />
     <Compile Include="AdvancedFem\AdvancedFem.cs" />
     <Compile Include="AdvancedFem\Cover.cs" />
@@ -175,6 +181,7 @@
     <Compile Include="Loads\LineTemperatureLoad.cs" />
     <Compile Include="Loads\LoadBase.cs" />
     <Compile Include="Loads\LoadCase.cs" />
+    <Compile Include="Loads\LoadCombinationCaseBase.cs" />
     <Compile Include="Loads\LoadCombinationTable.cs" />
     <Compile Include="Loads\LoadCombination.cs" />
     <Compile Include="Loads\LoadCombinationType.cs" />
@@ -185,12 +192,13 @@
     <Compile Include="Loads\LoadDirTypeEnum.cs" />
     <Compile Include="Loads\LoadLocationValue.cs" />
     <Compile Include="Loads\Loads.cs" />
+    <Compile Include="Loads\StageLoadCase.cs" />
     <Compile Include="Loads\LoadCategory.cs" />
     <Compile Include="Loads\LoadCategories.cs" />
     <Compile Include="Loads\MassConversionTable.cs" />
     <Compile Include="Loads\ModelLoadCaseInGroup.cs" />
-    <Compile Include="Loads\ModelLoadCase.cs" />
     <Compile Include="Loads\ModelGeneralLoadGroup.cs" />
+    <Compile Include="Loads\ModelLoadCase.cs" />
     <Compile Include="Loads\LoadGroupPermanent.cs" />
     <Compile Include="Loads\LoadGroupTemporary.cs" />
     <Compile Include="Loads\PointLoad.cs" />
@@ -318,6 +326,7 @@
     <Compile Include="Supports\Group.cs" />
     <Compile Include="Supports\LineSupport.cs" />
     <Compile Include="Supports\PointSupport.cs" />
+    <Compile Include="Supports\StiffnessPoints.cs" />
     <Compile Include="Supports\Supports.cs" />
     <Compile Include="Supports\SurfaceSupport.cs" />
   </ItemGroup>
diff --git a/FemDesign.Core/GenericClasses/INamedEntity.cs b/FemDesign.Core/GenericClasses/INamedEntity.cs
new file mode 100644
index 000000000..b32b62cfa
--- /dev/null
+++ b/FemDesign.Core/GenericClasses/INamedEntity.cs
@@ -0,0 +1,32 @@
+// https://strusoft.com/
+
+namespace FemDesign
+{
+    /// <summary>
+    /// Entities with a name/identifier. E.g "B.42" or "@MyLockedName.1"
+    /// </summary>
+    public interface INamedEntity
+    {
+        /// <summary>
+        /// Name of the entity. E.g. "B.42"
+        /// </summary>
+        string Name { get; }
+
+        /// <summary>
+        /// Instance number.
+        /// </summary>
+        int Instance { get; }
+
+        /// <summary>
+        /// Identifier part of the name.
+        /// </summary>
+        string Identifier { get; set; }
+
+        /// <summary>
+        /// When true, FEM-Design will not modify the Instance number of the Name. Note that this might not always be possible. 
+        /// 
+        /// See https://github.com/strusoft/femdesign-api/issues/81#issuecomment-1250848165 for more info.
+        /// </summary>
+        bool LockedIdentifier { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Core/GenericClasses/NamedEntityBase.cs b/FemDesign.Core/GenericClasses/NamedEntityBase.cs
new file mode 100644
index 000000000..4b5aaa76b
--- /dev/null
+++ b/FemDesign.Core/GenericClasses/NamedEntityBase.cs
@@ -0,0 +1,74 @@
+// https://strusoft.com/
+using System;
+using System.Xml.Serialization;
+using System.Text.RegularExpressions;
+using FemDesign.GenericClasses;
+
+namespace FemDesign
+{
+    public abstract partial class NamedEntityBase : EntityBase, INamedEntity
+    {
+        [XmlAttribute("name")]
+        public string _name; // identifier
+        [XmlIgnore]
+        public virtual string Name => _namePattern.Match(this._name).Groups["name"].Value;
+        [XmlIgnore]
+        public virtual int Instance => int.Parse(_namePattern.Match(this._name).Groups["instance"].Value);
+
+        [XmlIgnore]
+        public virtual string Identifier
+        {
+            get => _namePattern.Match(this._name).Groups["identifier"].Value;
+            set
+            {
+                this._name = $"{value}.{GetUniqueInstanceCount()}";
+
+                if (string .IsNullOrEmpty(value) || _namePattern.IsMatch(this._name) == false)
+                    throw new ArgumentException($"'{value}' is not a valid Identifier.");
+            }
+        }
+
+        [XmlIgnore]
+        public virtual bool LockedIdentifier
+        {
+            get => _name.StartsWith("@");
+            set
+            {
+                if (value && !LockedIdentifier)
+                    _name = "@" + _name;
+                else if (!value && LockedIdentifier)
+                    _name = _name.Substring(1);
+            }
+        }
+
+        protected static readonly Regex _namePattern = new Regex(@"^@{0,1}(?'name'(?'identifier'[ -#%'-;=?A-\ufffd;]{0,50})\.(?'instance'[0-9]{1,6}){1})$");
+
+        protected NamedEntityBase()
+        {
+            this._name = "";
+        }
+
+        /// <summary>
+        /// This value will be used to set number (like ".1") part of the entity name (like "B.1"). Typically this is a counter starting at 1 and incrementing for each new instance of this class that has been created.
+        /// </summary>
+        /// <returns>A unique number.</returns>
+        protected abstract int GetUniqueInstanceCount();
+    }
+
+    public abstract partial class NamedEntityPartBase : NamedEntityBase
+    {
+        public override string Name => _namePattern.Match(base._name).Groups["name"].Value;
+        public override int Instance => int.Parse(_namePattern.Match(base._name).Groups["instance"].Value);
+        [XmlIgnore]
+        public override string Identifier
+        {
+            get => _namePattern.Match(base._name).Groups["identifier"].Value;
+            set
+            {
+                base.Identifier = value;
+                base._name += ".1";
+            }
+        }
+        protected new static readonly Regex _namePattern = new Regex(@"@{0,1}(?'name'(?'identifier'[ -#%'-;=?A-\ufffd;]{0,50})\.(?'instance'[0-9]{1,6}){1}\.1)");
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Core/GenericClasses/RestrictedDouble.cs b/FemDesign.Core/GenericClasses/RestrictedDouble.cs
index 3f2bfe72f..0cd91f467 100644
--- a/FemDesign.Core/GenericClasses/RestrictedDouble.cs
+++ b/FemDesign.Core/GenericClasses/RestrictedDouble.cs
@@ -56,7 +56,7 @@ internal static double AbsMax_10000(double val)
         }
 
         /// <summary>
-        // abs_max_1e20
+        /// abs_max_1e20
         /// </summary>
         internal static double AbsMax_1e20(double val)
         {
@@ -83,7 +83,7 @@ internal static double NonNegMax_10(double val)
         }
 
         /// <summary>
-        // non_neg_max_100
+        /// non_neg_max_100
         /// </summary>
         internal static double NonNegMax_100(double val)
         {
diff --git a/FemDesign.Core/Geometry/Face.cs b/FemDesign.Core/Geometry/Face.cs
index f2c8573ad..3d6bd0ac1 100644
--- a/FemDesign.Core/Geometry/Face.cs
+++ b/FemDesign.Core/Geometry/Face.cs
@@ -47,7 +47,6 @@ public Face(int node1, int node2, int node3, int node4)
         /// <param name="node1"></param>
         /// <param name="node2"></param>
         /// <param name="node3"></param>
-        /// <param name="node4"></param>
         public Face(int node1, int node2, int node3)
         {
             this.Node1 = node1;
diff --git a/FemDesign.Core/Geometry/LineSegment.cs b/FemDesign.Core/Geometry/LineSegment.cs
index b399e6567..6b693e617 100644
--- a/FemDesign.Core/Geometry/LineSegment.cs
+++ b/FemDesign.Core/Geometry/LineSegment.cs
@@ -36,7 +36,8 @@ public LineSegment()
         /// <summary>
         /// Construct LineSegment from start and endpoint.
         /// </summary>
-        /// <param name="verticies"></param>
+        /// <param name="start"></param>
+        /// <param name="end"></param>
         public LineSegment(Point3d start, Point3d end)
         {
             this.StartPoint = start;
diff --git a/FemDesign.Core/Geometry/Region.cs b/FemDesign.Core/Geometry/Region.cs
index 05232acd2..e20628327 100644
--- a/FemDesign.Core/Geometry/Region.cs
+++ b/FemDesign.Core/Geometry/Region.cs
@@ -128,12 +128,12 @@ public static Region RectangleXZ(double width, double height)
             return region;
         }
 
-        public static Region RectangleXY(double width, double length)
+        public static Region RectangleXY(Point3d corner, double widthX, double widthY)
         {
-            var points0 = new Point3d(0, 0, 0);
-            var points1 = new Point3d(width, 0, 0);
-            var points2 = new Point3d(width, length, 0);
-            var points3 = new Point3d(0, length, 0);
+            var points0 = corner + new Vector3d(0, 0, 0);
+            var points1 = corner + new Vector3d(widthX, 0, 0);
+            var points2 = corner + new Vector3d(widthX, widthY, 0);
+            var points3 = corner + new Vector3d(0, widthY, 0);
 
             var points = new List<Point3d>() { points0, points1, points2, points3 };
 
@@ -186,8 +186,9 @@ public void SetEdgeConnection(Shells.EdgeConnection edgeConnection, int index)
                                 edge.EdgeConnection = null;
                             }
                             else
-                            { 
-                                string name = "CE." + cInstance.ToString();
+                            {
+                                string name = edgeConnection.Name == null ? "CE." + cInstance.ToString() : edgeConnection.Name;
+
                                 Shells.EdgeConnection ec = Shells.EdgeConnection.CopyExisting(edgeConnection, name);
                                 edge.EdgeConnection = ec;
                             }
diff --git a/FemDesign.Core/Geometry/RegionGroup.cs b/FemDesign.Core/Geometry/RegionGroup.cs
index 41f036df3..9c67f897d 100644
--- a/FemDesign.Core/Geometry/RegionGroup.cs
+++ b/FemDesign.Core/Geometry/RegionGroup.cs
@@ -16,7 +16,7 @@ public partial class RegionGroup
 
         /// <summary>
         /// Parameterless constructor for serialization
-        /// <summary>
+        /// </summary>
         private RegionGroup()
         {
 
@@ -24,7 +24,7 @@ private RegionGroup()
 
         /// <summary>
         /// Construct region group from single region
-        /// <summary>
+        /// </summary>
         public RegionGroup(Region region)
         {
             this.Regions.Add(region);
@@ -32,7 +32,7 @@ public RegionGroup(Region region)
 
         /// <summary>
         /// Construct region group from list of regions
-        /// <summary>
+        /// </summary>
         public RegionGroup(List<Region> regions)
         {
             this.Regions = regions;
diff --git a/FemDesign.Core/Loads/LineStressLoad.cs b/FemDesign.Core/Loads/LineStressLoad.cs
index 9e67cebdf..bb627c8fd 100644
--- a/FemDesign.Core/Loads/LineStressLoad.cs
+++ b/FemDesign.Core/Loads/LineStressLoad.cs
@@ -1,5 +1,6 @@
 // https://strusoft.com/
 
+using FemDesign.Geometry;
 using System.Collections.Generic;
 using System.Xml.Serialization;
 
@@ -9,7 +10,7 @@ namespace FemDesign.Loads
     /// line_stress_load_type
     /// </summary>
     [System.Serializable]
-    public partial class LineStressLoad: LoadBase
+    public partial class LineStressLoad : LoadBase
     {
         /// <summary>
         /// Edge defining the geometry of the load
@@ -68,21 +69,90 @@ private LineStressLoad()
 
         }
 
+        /// <summary>
+        /// Construct a line stress load
+        /// </summary>
+        /// <param name="edge"></param>
+        /// <param name="force">Force (n1 and n2)</param>
+        /// <param name="loadCase">Load case</param>
+        /// <param name="comment">Comment</param>
+        public LineStressLoad(Edge edge, double force, LoadCase loadCase, string comment = "")
+                : this(edge, edge.CoordinateSystem.LocalY, force, force, 0.0, 0.0, loadCase, comment)
+        { }
+
+        /// <summary>
+        /// Construct a line stress load
+        /// </summary>
+        /// <param name="edge">Underlying edge of line load. Line or Arc.</param>
+        /// <param name="force">Force (n1 and n2)</param>
+        /// <param name="moment">Moment (m1 and m2)</param>
+        /// <param name="loadCase">Load case</param>
+        /// <param name="comment">Comment</param>
+        public LineStressLoad(Edge edge, double force, double moment, LoadCase loadCase, string comment = "")
+                : this(edge, edge.CoordinateSystem.LocalY, force, force, moment, moment, loadCase, comment)
+        { }
+
+        /// <summary>
+        /// Construct a uniform or variable line stress load
+        /// </summary>
+        /// <param name="edge">Underlying edge of line load. Line or Arc.</param>
+        /// <param name="n1">Force at start.</param>
+        /// <param name="n2">Force at end.</param>
+        /// <param name="m1">Moment at start.</param>
+        /// <param name="m2">Moment at end.</param>
+        /// <param name="loadCase">Load case</param>
+        /// <param name="comment">Comment</param>
+        public LineStressLoad(Edge edge, double n1, double n2, double m1, double m2, LoadCase loadCase, string comment = "")
+                : this(edge, edge.CoordinateSystem.LocalY, n1, n2, m1, m2, loadCase, comment)
+        { }
+
         /// <summary>
         /// Construct a uniform or variable line stress load
         /// </summary>
         /// <param name="edge">Underlying edge of line load. Line or Arc.</param>
         /// <param name="direction">Direction of load.</param>
-        /// <param name="topBotLocVal">List of 2 top bottom location values</param>
-        public LineStressLoad(Geometry.Edge edge, Geometry.Vector3d direction, List<TopBotLocationValue> topBotLocVals, LoadCase loadCase, string comment)
+        /// <param name="n1">Force at start.</param>
+        /// <param name="n2">Force at end.</param>
+        /// <param name="m1">Moment at start.</param>
+        /// <param name="m2">Moment at end.</param>
+        /// <param name="loadCase">Load case</param>
+        /// <param name="comment">Comment</param>
+        public LineStressLoad(Edge edge, Vector3d direction, double n1, double n2, double m1, double m2, LoadCase loadCase, string comment = "")
+        {
+            var topBotLocVals = new List<TopBotLocationValue> {
+                new TopBotLocationValue(edge.Points[0], n1, m1),
+                new TopBotLocationValue(edge.Points[0], n2, m2)
+            };
+            Initialize(edge, direction, topBotLocVals, loadCase, comment);
+        }
+
+        /// <summary>
+        /// Construct a uniform or variable line stress load
+        /// </summary>
+        /// <param name="edge">Underlying edge of line load. Line or Arc.</param>
+        /// <param name="direction">Direction of load.</param>
+        /// <param name="topBotLocVals">List of 2 top bottom location values</param>
+        /// <param name="loadCase">Load case</param>
+        /// <param name="comment">Comment</param>
+        public LineStressLoad(Edge edge, Vector3d direction, List<TopBotLocationValue> topBotLocVals, LoadCase loadCase, string comment = "")
+        {
+            Initialize(edge, direction, topBotLocVals, loadCase, comment);
+        }
+
+        private void Initialize(Edge edge, Vector3d direction, List<TopBotLocationValue> topBotLocVals, LoadCase loadCase, string comment)
         {
             this.EntityCreated();
             this.Edge = edge;
             this.Direction = direction;
             this.TopBotLocVal = topBotLocVals;
             this.LoadCaseGuid = loadCase.Guid;
+            this.LoadCaseName = loadCase.Name;
             this.Comment = comment;
         }
 
+        public override string ToString()
+        {
+            return $"{this.GetType().Name}, Force: {TopBotLocVal[0].TopVal:0.0}/{TopBotLocVal[1].TopVal:0.0}kN, Moment: {TopBotLocVal[0].BottomVal:0.0}/{TopBotLocVal[1].BottomVal:0.0}kNm, LoadCase: {this.LoadCaseName}";
+        }
     }
 }
\ No newline at end of file
diff --git a/FemDesign.Core/Loads/LineTemperatureLoad.cs b/FemDesign.Core/Loads/LineTemperatureLoad.cs
index aa5cd0f12..01f3f87fe 100644
--- a/FemDesign.Core/Loads/LineTemperatureLoad.cs
+++ b/FemDesign.Core/Loads/LineTemperatureLoad.cs
@@ -70,7 +70,9 @@ private LineTemperatureLoad()
         /// </summary>
         /// <param name="edge">Underlying edge of line load. Line or Arc.</param>
         /// <param name="direction">Directio of load.</param>
-        /// <param name="topBotLocVal">1 or 2 top bottom location values</param>
+        /// <param name="topBotLocVals">1 or 2 top bottom location values</param>
+        /// <param name="loadCase"></param>
+        /// <param name="comment"></param>
         public LineTemperatureLoad(Geometry.Edge edge, Geometry.Vector3d direction, List<TopBotLocationValue> topBotLocVals, LoadCase loadCase, string comment)
         {
             this.EntityCreated();
diff --git a/FemDesign.Core/Loads/LoadCombination.cs b/FemDesign.Core/Loads/LoadCombination.cs
index 0e48866a1..8d5f4e249 100644
--- a/FemDesign.Core/Loads/LoadCombination.cs
+++ b/FemDesign.Core/Loads/LoadCombination.cs
@@ -2,6 +2,7 @@
 
 using System.Collections.Generic;
 using System.Xml.Serialization;
+using System.Linq;
 
 namespace FemDesign.Loads
 {
@@ -14,9 +15,59 @@ public partial class LoadCombination : EntityBase
         [XmlAttribute("name")]
         public string Name { get; set; } // name159
         [XmlAttribute("type")]
-        public LoadCombType Type { get; set; } // loadcombtype 
+        public LoadCombType Type { get; set; } // loadcombtype
+
+        // CASES: Xml elements sequence in order
+        //
+        // load_case (sequence)
+        // seismic_max
+        // seismic_res_fx_plus_mx
+        // seismic_res_fx_minus_mx
+        // seismic_res_fy_plus_my
+        // seismic_res_fy_minus_my
+        // seismic_res_fz
+        // ptc_t0
+        // ptc_t8
+        // ldcase_pile
+        // cs_case
+
         [XmlElement("load_case")]
-        public List<ModelLoadCase> ModelLoadCase = new List<ModelLoadCase>(); // sequence: ModelLoadCase
+        public List<ModelLoadCase> ModelLoadCase { get; set; } = new List<ModelLoadCase>();
+
+        // Special load cases of the combination, from FD18
+        [XmlElement("seismic_max")]
+        public LoadCombinationCaseBase SeismicMax { get; set; }
+
+        [XmlElement("seismic_res_fx_plus_mx")]
+        public LoadCombinationCaseBase SeismicResFxPlusMx { get; set; }
+
+        [XmlElement("seismic_res_fx_minus_mx")]
+        public LoadCombinationCaseBase SeismicResFxMinusMx { get; set; }
+
+        [XmlElement("seismic_res_fy_plus_my")]
+        public LoadCombinationCaseBase SeismicResFyPlusMy { get; set; }
+
+        [XmlElement("seismic_res_fy_minus_my")]
+        public LoadCombinationCaseBase SeismicResFyMinusMy { get; set; }
+
+        [XmlElement("seismic_res_fz")]
+        public LoadCombinationCaseBase SeismicResFz { get; set; }
+
+        // Special load cases of the combination, from FD19
+        [XmlElement("ptc_t0")]
+        public LoadCombinationCaseBase PtcT0 { get; set; }
+
+        [XmlElement("ptc_t8")]
+        public LoadCombinationCaseBase PtcT8 { get; set; }
+
+        // Special load cases of the combination, from FD20
+        [XmlElement("ldcase_pile")]
+        public LoadCombinationCaseBase PileLoadCase { get; set; }
+
+        // Special load cases of the combination, from FD21.0003
+        [XmlElement("cs_case")]
+        public StageLoadCase StageLoadCase { get; set; }
+
         [XmlIgnore]
         public Calculate.CombItem CombItem { get; set; }
 
@@ -28,9 +79,6 @@ private LoadCombination()
 
         }
 
-        /// <summary>
-        /// Internal constructor. Used for GH components and Dynamo nodes.
-        /// </summary>
         public LoadCombination(string name, LoadCombType type, List<LoadCase> loadCases, List<double> gammas, Calculate.CombItem combItem = null)
         {
             Initialize(name, type, combItem);
@@ -95,18 +143,133 @@ public List<double> GetGammas()
         }
 
         /// <summary>
-        /// Add LoadCase to LoadCombination.
+        /// 
         /// </summary>
-        private void AddLoadCase(LoadCase loadCase, double gamma)
+        /// <returns>List of pairs of CaseId and gamma values. CaseId may be LoadCase guid, construction stage index description or special case name.</returns>
+        public List<(string CaseId, double Gamma)> GetCaseDescriptionAndGammas()
         {
-            if (this.LoadCaseInLoadCombination(loadCase))
+            var pairs = new List<(string CaseId, double Gamma)>();
+            for (int i = 0; i < ModelLoadCase.Count; i++)
             {
-                // pass
+                pairs.Add((ModelLoadCase[i].Guid.ToString(), ModelLoadCase[i].Gamma));
             }
-            else
+
+            if (SeismicMax != null)
+                pairs.Add(("Seismic max.", SeismicMax.Gamma));
+            if (SeismicResFxMinusMx != null)
+                pairs.Add(("Seismic fx-mx", SeismicResFxMinusMx.Gamma));
+            if (SeismicResFxPlusMx != null)
+                pairs.Add(("Seismic fx+mx", SeismicResFxPlusMx.Gamma));
+            if (SeismicResFyMinusMy != null)
+                pairs.Add(("Seismic fy-my", SeismicResFyMinusMy.Gamma));
+            if (SeismicResFyPlusMy != null)
+                pairs.Add(("Seismic fy+my", SeismicResFyPlusMy.Gamma));
+            if (SeismicResFz != null)
+                pairs.Add(("Seismic fz", SeismicResFz.Gamma));
+
+            if (PtcT0 != null)
+                pairs.Add(("Ptc T0", PtcT0.Gamma));
+            if (PtcT8 != null)
+                pairs.Add(("Ptc T8", PtcT8.Gamma));
+
+            if (PileLoadCase != null)
+                pairs.Add(("pile loadcase", PileLoadCase.Gamma));
+
+            if (StageLoadCase != null)
+                pairs.Add((StageLoadCase._stageType, StageLoadCase.Gamma));
+
+            return pairs;
+        }
+
+
+
+        public List<(LoadCase Case, double Gamma, string CaseType)> GetLoadCasesAndGammas()
+        {
+            var pairs = new List<(LoadCase Case, double Gamma, string CaseType)>();
+            for (int i = 0; i < ModelLoadCase.Count; i++)
             {
-                this.ModelLoadCase.Add(new ModelLoadCase(loadCase, gamma));
+                pairs.Add((
+                    ModelLoadCase[i].LoadCase,
+                    ModelLoadCase[i].Gamma,
+                    ModelLoadCase[i].IsMovingLoadLoadCase ? "Moving load case" : "Load case"
+                    ));
             }
+            return pairs;
+        }
+        public List<(string Case, double Gamma)> GetSpecialCasesAndGammas()
+        {
+            var pairs = new List<(string Case, double Gamma)>();
+
+            if (SeismicMax != null)
+                pairs.Add(("Seismic max.", SeismicMax.Gamma));
+            if (SeismicResFxMinusMx != null)
+                pairs.Add(("Seis res, Fx-Mx", SeismicResFxMinusMx.Gamma));
+            if (SeismicResFxPlusMx != null)
+                pairs.Add(("Seis res, Fx+Mx", SeismicResFxPlusMx.Gamma));
+            if (SeismicResFyMinusMy != null)
+                pairs.Add(("Seis res, Fy-My", SeismicResFyMinusMy.Gamma));
+            if (SeismicResFyPlusMy != null)
+                pairs.Add(("Seis res, Fy+My", SeismicResFyPlusMy.Gamma));
+            if (SeismicResFz != null)
+                pairs.Add(("Seis res, Fz", SeismicResFz.Gamma));
+
+            if (PtcT0 != null)
+                pairs.Add(("PTC T0", PtcT0.Gamma));
+            if (PtcT8 != null)
+                pairs.Add(("PTC T8", PtcT8.Gamma));
+
+            if (PileLoadCase != null)
+                pairs.Add(("Neg. Shaft friction", PileLoadCase.Gamma));
+
+            return pairs;
+        }
+
+        public List<(object Case, double Gamma, string CaseType)> GetCaseAndGammas()
+        {
+            var pairs = new List<(object, double, string)>();
+            pairs.AddRange(
+                GetLoadCasesAndGammas()
+                .Select((t) => { return ((object)t.Case, t.Gamma, t.CaseType); })
+                .ToList());
+            pairs.AddRange(
+                GetSpecialCasesAndGammas()
+                .Select((t) => { return ((object)t.Case, t.Gamma, "Special load case"); })
+                .ToList());
+
+            if (StageLoadCase is null) return pairs;
+
+            if (StageLoadCase.IsFinalStage)
+                pairs.Add(("Final construction stage", StageLoadCase.Gamma, "Special load case"));
+            else
+                pairs.Add((StageLoadCase.Stage, StageLoadCase.Gamma, "Stage"));
+
+            return pairs;
+        }
+
+        /// <summary>
+        /// Add LoadCase to LoadCombination.
+        /// </summary>
+        public void AddLoadCase(LoadCase loadCase, double gamma)
+        {
+            if (this.LoadCaseInLoadCombination(loadCase))
+                return;
+
+            this.ModelLoadCase.Add(new ModelLoadCase(loadCase, gamma));
+        }
+
+        public void SetStageLoadCase(Stage stage, double gamma)
+        {
+            this.StageLoadCase = new StageLoadCase(stage, gamma);
+        }
+
+        public void SetFinalStageLoadCase(double gamma)
+        {
+            this.StageLoadCase = StageLoadCase.FinalStage(gamma);
+        }
+
+        public void RemoveStageLoadCase()
+        {
+            this.StageLoadCase = null;
         }
 
         /// <summary>
@@ -114,14 +277,7 @@ private void AddLoadCase(LoadCase loadCase, double gamma)
         /// </summary>
         private bool LoadCaseInLoadCombination(LoadCase loadCase)
         {
-            foreach (ModelLoadCase elem in this.ModelLoadCase)
-            {
-                if (elem.Guid == loadCase.Guid)
-                {
-                    return true;
-                }
-            }
-            return false;
+            return this.ModelLoadCase.Any(elem => elem.Guid == loadCase.Guid);
         }
 
         public override string ToString()
@@ -131,14 +287,23 @@ public override string ToString()
             const int gammaSpace = -3;
             var repr = "";
             repr += $"{this.Name,space} {this.Type}\n";
-            foreach (var item in this.ModelLoadCase)
+
+            var casesAndGammas = GetCaseAndGammas();
+
+            foreach (var (@case, gamma, type) in casesAndGammas)
             {
-                if(item.LoadCase == null) { return base.ToString(); } // Deserialisation can not get the loadcase name from the object. Only the GUID
+                if (@case is null) { return base.ToString(); } // Deserialisation can not get the loadcase name from the object.
+
+                if (@case.GetType() == typeof(LoadCase))
+                {
+                    var lc = (LoadCase)@case;
+                    repr += $"{"",space - 1}{gamma,gammaSpace} {lc.Name,caseNameSpace}\n";
+                }
                 else
-                    repr += $"{"",space - 1}{item.LoadCase.Name,caseNameSpace} {item.Gamma,gammaSpace}\n";
+                    repr += $"{"",space - 1}{gamma,gammaSpace} {@case,caseNameSpace}\n";
             }
-            
+
             return repr;
         }
     }
-}
\ No newline at end of file
+}
diff --git a/FemDesign.Core/Loads/LoadCombinationCaseBase.cs b/FemDesign.Core/Loads/LoadCombinationCaseBase.cs
new file mode 100644
index 000000000..1ab0d12b0
--- /dev/null
+++ b/FemDesign.Core/Loads/LoadCombinationCaseBase.cs
@@ -0,0 +1,21 @@
+// https://strusoft.com/
+
+using System.Xml.Serialization;
+
+namespace FemDesign.Loads
+{
+    public class LoadCombinationCaseBase // spec_load_case_item
+    {
+        [XmlAttribute("gamma")]
+        public double Gamma;
+
+        /// <summary>
+        /// Parameterless constructor for serialization
+        /// </summary>
+        protected LoadCombinationCaseBase() { }
+        public LoadCombinationCaseBase(double gamma)
+        {
+            Gamma = gamma;
+        }
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Core/Loads/LoadGroupPermanent.cs b/FemDesign.Core/Loads/LoadGroupPermanent.cs
index d9481b317..3cc9c6551 100644
--- a/FemDesign.Core/Loads/LoadGroupPermanent.cs
+++ b/FemDesign.Core/Loads/LoadGroupPermanent.cs
@@ -50,6 +50,7 @@ private LoadGroupPermanent() { }
         /// <param name="loadCases">List of load cases in the load group</param>
         /// <param name="relationsship">Specifies how to condider the load cases in combinations</param>
         /// <param name="xi">Xi-factor used in the combinations, see EN 1990.</param>
+        /// <param name="name"></param>
         public LoadGroupPermanent(double standardFavourable, 
                                        double standardUnfavourable, double accidentalFavourable,
                                        double accidentalUnfavourable, List<LoadCase> loadCases, 
diff --git a/FemDesign.Core/Loads/ModelLoadCase.cs b/FemDesign.Core/Loads/ModelLoadCase.cs
index f43419ae9..a2ec18f39 100644
--- a/FemDesign.Core/Loads/ModelLoadCase.cs
+++ b/FemDesign.Core/Loads/ModelLoadCase.cs
@@ -10,7 +10,7 @@ namespace FemDesign.Loads
     /// load_case (child of load_combination_type)
     /// </summary>
     [Serializable]
-    public partial class ModelLoadCase
+    public partial class ModelLoadCase : LoadCombinationCaseBase
     {
         [XmlAttribute("guid")]
         public string _guid = string.Empty;
@@ -25,8 +25,9 @@ public Guid Guid
                 else
                     return new Guid(_guid);
             }
-            set {
-                _guid = IsMovingLoadLoadCase ? _guid = $"{value}#{Index}": _guid = value.ToString();
+            set
+            {
+                _guid = IsMovingLoadLoadCase ? _guid = $"{value}#{Index}" : _guid = value.ToString();
             }
         }
         [XmlIgnore]
@@ -53,8 +54,6 @@ public int Index
         public bool IsMovingLoadLoadCase { get { return _guid.IndexOf('#') != -1; } }
         [XmlIgnore]
         public string IndexedGuid => _guid;
-        [XmlAttribute("gamma")]
-        public double Gamma { get; set; } // double
         [XmlIgnore]
         public LoadCase LoadCase { get; set; }
         public ModelLoadCase()
diff --git a/FemDesign.Core/Loads/ModelLoadCaseInGroup.cs b/FemDesign.Core/Loads/ModelLoadCaseInGroup.cs
index 085704e8b..5bfcafe09 100644
--- a/FemDesign.Core/Loads/ModelLoadCaseInGroup.cs
+++ b/FemDesign.Core/Loads/ModelLoadCaseInGroup.cs
@@ -23,6 +23,7 @@ private ModelLoadCaseInGroup() { }
         /// Public constructor.
         /// </summary>
         /// <param name="guid">LoadCase guid reference.</param>
+        /// <param name="parentLoadGroup"></param>
         public ModelLoadCaseInGroup(System.Guid guid, LoadGroupBase parentLoadGroup)
         {
             this.Guid = guid;
diff --git a/FemDesign.Core/Loads/PointLoad.cs b/FemDesign.Core/Loads/PointLoad.cs
index 0d1533075..04b38d2b2 100644
--- a/FemDesign.Core/Loads/PointLoad.cs
+++ b/FemDesign.Core/Loads/PointLoad.cs
@@ -27,7 +27,7 @@ private PointLoad()
         /// <summary>
         /// Internal constructor accessed by static methods.
         /// </summary>
-        public PointLoad(Geometry.Point3d point, Geometry.Vector3d force, LoadCase loadCase, string comment = "", ForceLoadType type = ForceLoadType.Force)
+        public PointLoad(Geometry.Point3d point, Geometry.Vector3d force, LoadCase loadCase, string comment, ForceLoadType type)
         {
             this.EntityCreated();
             this.LoadCaseGuid = loadCase.Guid;
diff --git a/FemDesign.Core/Loads/StageLoadCase.cs b/FemDesign.Core/Loads/StageLoadCase.cs
new file mode 100644
index 000000000..61ce4d7c4
--- /dev/null
+++ b/FemDesign.Core/Loads/StageLoadCase.cs
@@ -0,0 +1,44 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Xml.Serialization;
+
+namespace FemDesign.Loads
+{
+    public class StageLoadCase : LoadCombinationCaseBase
+    {
+        [XmlAttribute("type")]
+        public string _stageType;
+
+        private Stage _stage;
+        [XmlIgnore]
+        public Stage Stage { get { return _stage; }  set { _stage = value; _stageType = $"cs.{value.Id}"; } }
+
+        private const string _finalStage = "final_cs";
+        public bool IsFinalStage => _stageType == _finalStage;
+        public int StageIndex => IsFinalStage ? -1 : int.Parse(_stageType.Substring(3));
+
+        /// <summary>
+        /// Parameterless constructor for serialization
+        /// </summary>
+        private StageLoadCase()
+        {
+        }
+
+        public StageLoadCase(Stage stage, double gamma)
+        {
+            Gamma = gamma;
+            Stage = stage;
+        }
+
+        public static StageLoadCase FinalStage(double gamma)
+        {
+            return new StageLoadCase()
+            {
+                _stageType = _finalStage,
+                Gamma = gamma
+            };
+        }
+    }
+}
diff --git a/FemDesign.Core/Materials/Material.cs b/FemDesign.Core/Materials/Material.cs
index 17b71a9c4..b1346d43b 100644
--- a/FemDesign.Core/Materials/Material.cs
+++ b/FemDesign.Core/Materials/Material.cs
@@ -68,7 +68,7 @@ public static Material GetMaterialByNameOrIndex(List<Material> materials, dynami
                 }
                 catch (Exception ex)
                 {
-                    throw new Exception($"{materialInput} does not exist!");
+                    throw new Exception($"{materialInput} does not exist!", ex);
                 }
             }
             else
@@ -79,7 +79,7 @@ public static Material GetMaterialByNameOrIndex(List<Material> materials, dynami
                 }
                 catch (Exception ex)
                 {
-                    throw new System.Exception($"Materials List only contains {materials.Count} item. {materialInput} is out of range!");
+                    throw new System.Exception($"Materials List only contains {materials.Count} item. {materialInput} is out of range!", ex);
                 }
             }
             return material;
diff --git a/FemDesign.Core/Materials/MaterialDatabase.cs b/FemDesign.Core/Materials/MaterialDatabase.cs
index 287f23b71..2252d280d 100644
--- a/FemDesign.Core/Materials/MaterialDatabase.cs
+++ b/FemDesign.Core/Materials/MaterialDatabase.cs
@@ -230,7 +230,13 @@ public static MaterialDatabase GetDefault(string countryCode = "S")
 
         public (List<Material> steel, List<Material> concrete, List<Material> timber, List<Material> reinforcement, List<Material> stratum, List<Material> custom) ByType()
         {
-            var materialDataBaseList = this.Materials.Material.Concat(this.ReinforcingMaterials.Material);
+            var materialDataBaseList = new List<Material>();
+            if (this.ReinforcingMaterials != null)
+            {
+                materialDataBaseList = this.Materials.Material.Concat(this.ReinforcingMaterials.Material).ToList();
+            }
+            else
+                materialDataBaseList.AddRange(this.Materials.Material);
 
             var steel = new List<Material>();
             var timber = new List<Material>();
diff --git a/FemDesign.Core/Model/Model.cs b/FemDesign.Core/Model/Model.cs
index 6e63ff6a5..a41f0b2ba 100644
--- a/FemDesign.Core/Model/Model.cs
+++ b/FemDesign.Core/Model/Model.cs
@@ -125,6 +125,7 @@ private Model()
         /// <param name="loadCases">Load cases</param>
         /// <param name="loadCombinations">Load combinations</param>
         /// <param name="loadGroups">Load groups</param>
+        /// <param name="constructionStage">Construction stages object instance.</param>
         public Model(Country country, List<IStructureElement> elements = null, List<ILoadElement> loads = null, List<Loads.LoadCase> loadCases = null, List<Loads.LoadCombination> loadCombinations = null, List<Loads.ModelGeneralLoadGroup> loadGroups = null, ConstructionStages constructionStage = null)
         {
             Initialize(country);
@@ -248,6 +249,8 @@ public static Model DeserializeFromFilePath(string filePath)
                 model.GetLineConnections();
             if (model.ConstructionStages != null && model.ConstructionStages.Stages.Any())
                 model.GetConstructionStages();
+            if (model.Entities?.Loads?.LoadCombinations != null && model.Entities.Loads.LoadCombinations.Any())
+                model.GetLoadCombinations();
             return model;
         }
 
@@ -263,13 +266,20 @@ public void SerializeModel(string filePath)
                 filePath = System.IO.Path.Combine(currentDirectory, "myModel.struxml");
             }
 
-            // check file extension
+            // Relavive paths will be converted to full paths
+            filePath = System.IO.Path.GetFullPath(filePath);
+
+            // If path has no file extension "struxml" will be used
+            if (Path.GetExtension(filePath) == "")
+                filePath = Path.ChangeExtension(filePath, "struxml");
+
+            // Check file extension
             if (Path.GetExtension(filePath) != ".struxml")
             {
                 throw new System.ArgumentException("File extension must be .struxml! Model.SerializeModel failed.");
             }
 
-            // serialize
+            // Serialize
             XmlSerializer serializer = new XmlSerializer(typeof(Model));
             using (TextWriter writer = new StreamWriter(filePath))
             {
@@ -287,12 +297,12 @@ public void SerializeModel(string filePath)
         /// <param name="checkOpenFiles"></param>
         public static (Model fdModel, IEnumerable<Results.IResult> results) ReadStr(string strPath, IEnumerable<Type> resultTypes, bool killProcess = false, bool endSession = true, bool checkOpenFiles = true)
         {
-            if(resultTypes != null)
-			{
+            if (resultTypes != null)
+            {
                 var notAResultType = resultTypes.Where(r => !typeof(Results.IResult).IsAssignableFrom(r)).FirstOrDefault();
                 if (notAResultType != null)
                     throw new ArgumentException($"{notAResultType.Name} is not a result type. (It does not inherit from {typeof(FemDesign.Results.IResult).FullName})");
-			}
+            }
 
             var fdScript = Calculate.FdScript.ExtractResults(strPath, resultTypes);
 
@@ -337,7 +347,7 @@ public void Open(string filePath = null, bool closeOpenWindows = false)
             this.FdApp.OpenStruxml(filePath, closeOpenWindows);
         }
 
-        public void RunAnalysis(Calculate.Analysis analysis, IEnumerable<Type> resultTypes = null, Results.UnitResults units = null, string struxmlPath = null, string docxTemplatePath = null, bool endSession = false, bool closeOpenWindows = false, Calculate.CmdGlobalCfg cmdGlobalCfg = null)
+        public bool RunAnalysis(Calculate.Analysis analysis, IEnumerable<Type> resultTypes = null, Results.UnitResults units = null, string struxmlPath = null, string docxTemplatePath = null, bool endSession = false, bool closeOpenWindows = false, Calculate.CmdGlobalCfg cmdGlobalCfg = null)
         {
             if (struxmlPath == null)
             {
@@ -353,10 +363,10 @@ public void RunAnalysis(Calculate.Analysis analysis, IEnumerable<Type> resultTyp
 
             this.SerializeModel(struxmlPath);
             analysis.SetLoadCombinationCalculationParameters(this);
-            this.FdApp.RunAnalysis(struxmlPath, analysis, bscPath, docxTemplatePath, endSession, closeOpenWindows, cmdGlobalCfg);
+            return this.FdApp.RunAnalysis(struxmlPath, analysis, bscPath, docxTemplatePath, endSession, closeOpenWindows, cmdGlobalCfg);
         }
 
-        public void RunDesign(Calculate.CmdUserModule mode, Calculate.Analysis analysis, Calculate.Design design, IEnumerable<Type> resultTypes = null, Results.UnitResults units = null, string struxmlPath = null, string docxTemplatePath = null, bool endSession = false, bool closeOpenWindows = false, Calculate.CmdGlobalCfg cmdGlobalCfg = null)
+        public bool RunDesign(Calculate.CmdUserModule mode, Calculate.Analysis analysis, Calculate.Design design, IEnumerable<Type> resultTypes = null, Results.UnitResults units = null, string struxmlPath = null, string docxTemplatePath = null, bool endSession = false, bool closeOpenWindows = false, Calculate.CmdGlobalCfg cmdGlobalCfg = null)
         {
             if (struxmlPath == null)
             {
@@ -375,7 +385,7 @@ public void RunDesign(Calculate.CmdUserModule mode, Calculate.Analysis analysis,
 
             this.SerializeModel(struxmlPath);
             analysis.SetLoadCombinationCalculationParameters(this);
-            this.FdApp.RunDesign(mode.ToString(), struxmlPath, analysis, design, bscPath, docxTemplatePath, endSession, closeOpenWindows, cmdGlobalCfg);
+            return this.FdApp.RunDesign(mode.ToString(), struxmlPath, analysis, design, bscPath, docxTemplatePath, endSession, closeOpenWindows, cmdGlobalCfg);
         }
 
         /// <summary>
@@ -1082,6 +1092,7 @@ private bool DiaphragmInModel(ModellingTools.Diaphragm obj)
         /// Add Load to Model.
         /// </summary>
         /// <param name="obj">PointLoad, LineLoad, PressureLoad, SurfaceLoad</param>
+        /// <param name="overwrite"></param>
         private void AddLoad(object obj, bool overwrite)
         {
             if (obj == null)
@@ -1547,29 +1558,32 @@ public void AddLoadCases(List<Loads.LoadCase> loadCases, bool overwrite = true)
         /// <summary>
         /// Add LoadCase to Model.
         /// </summary>
-        private void AddLoadCase(Loads.LoadCase obj, bool overwrite)
+        private void AddLoadCase(Loads.LoadCase loadCase, bool overwrite)
         {
+            if (loadCase is null)
+                throw new ArgumentNullException("loadCase");
+
             // in model?
-            bool inModel = this.LoadCaseInModel(obj);
+            bool inModel = this.LoadCaseInModel(loadCase);
 
             // in model, don't overwrite?
             if (inModel && !overwrite)
             {
-                throw new System.ArgumentException($"{obj.GetType().FullName} with guid: {obj.Guid} has already been added to model. Are you adding the same element twice?");
+                throw new System.ArgumentException($"{loadCase.GetType().FullName} with guid: {loadCase.Guid} has already been added to model. Are you adding the same element twice?");
             }
 
             // in model, overwrite
             else if (inModel && overwrite)
             {
-                this.Entities.Loads.LoadCases.RemoveAll(x => x.Guid == obj.Guid);
+                this.Entities.Loads.LoadCases.RemoveAll(x => x.Guid == loadCase.Guid);
             }
 
             // add load case
-            if (this.LoadCaseNameTaken(obj))
+            if (this.LoadCaseNameTaken(loadCase))
             {
-                obj.Name = obj.Name + " (1)";
+                loadCase.Name = loadCase.Name + " (1)";
             }
-            this.Entities.Loads.LoadCases.Add(obj);
+            this.Entities.Loads.LoadCases.Add(loadCase);
         }
 
         /// <summary>
@@ -1659,29 +1673,32 @@ public void AddLoadGroupTable(List<Loads.ModelGeneralLoadGroup> generalLoadGroup
         /// <summary>
         /// Add LoadCombination to Model.
         /// </summary>
-        private void AddLoadCombination(Loads.LoadCombination obj, bool overwrite)
+        private void AddLoadCombination(Loads.LoadCombination loadCombination, bool overwrite)
         {
+            if (loadCombination is null)
+                throw new ArgumentNullException("loadCombination");
+
             // in model?
-            bool inModel = this.LoadCombinationInModel(obj);
+            bool inModel = this.LoadCombinationInModel(loadCombination);
 
             // in model, don't overwrite
             if (inModel && !overwrite)
             {
-                throw new System.ArgumentException($"{obj.GetType().FullName} with guid: {obj.Guid} has already been added to model. Are you adding the same element twice?");
+                throw new System.ArgumentException($"{loadCombination.GetType().FullName} with guid: {loadCombination.Guid} has already been added to model. Are you adding the same element twice?");
             }
 
             // in model, overwrite
             else if (inModel && overwrite)
             {
-                this.Entities.Loads.LoadCombinations.RemoveAll(x => x.Guid == obj.Guid);
+                this.Entities.Loads.LoadCombinations.RemoveAll(x => x.Guid == loadCombination.Guid);
             }
 
             // add load combination
-            if (this.LoadCombinationNameTaken(obj))
+            if (this.LoadCombinationNameTaken(loadCombination))
             {
-                obj.Name = obj.Name + " (1)";
+                loadCombination.Name = loadCombination.Name + " (1)";
             }
-            this.Entities.Loads.LoadCombinations.Add(obj);
+            this.Entities.Loads.LoadCombinations.Add(loadCombination);
         }
 
         /// <summary>
@@ -1868,6 +1885,7 @@ private bool PredefRigidityInModel(Releases.RigidityDataLibType3 obj)
         /// Add StructureGrid (axis or storey) to model.
         /// </summary>
         /// <param name="obj">Axis, Storey</param>
+        /// <param name="overwrite"></param>
         private void AddStructureGrid(object obj, bool overwrite)
         {
             if (obj == null)
@@ -1892,6 +1910,7 @@ private void AddStructureGrid(object obj, bool overwrite)
         /// Add axis to entities.
         /// </summary>
         /// <param name="obj">Axis.</param>
+        /// <param name="overwrite"></param>
         private void AddAxis(StructureGrid.Axis obj, bool overwrite)
         {
             // check if axes in entities
@@ -1940,6 +1959,7 @@ private bool AxisInModel(StructureGrid.Axis obj)
         /// Add Storey to Model.
         /// </summary>
         /// <param name="obj">Storey.</param>
+        /// <param name="overwrite"></param>
         private void AddStorey(StructureGrid.Storey obj, bool overwrite)
         {
             // check if storeys in entities
@@ -2064,6 +2084,7 @@ private bool BarReinforcementInModel(Reinforcement.BarReinforcement obj)
         /// Add SurfaceReinforcement(s) from Slab to Model.
         /// </summary>
         /// <param name="obj"></param>
+        /// <param name="overwrite"></param>
         private void AddSurfaceReinforcements(Shells.Slab obj, bool overwrite)
         {
             foreach (Reinforcement.SurfaceReinforcement surfaceReinforcement in obj.SurfaceReinforcement)
@@ -2166,6 +2187,7 @@ private bool SurfaceReinforcementParametersInModel(Reinforcement.SurfaceReinforc
         /// Add Support to Model
         /// </summary>
         /// <param name="obj">PointSupport, LineSupport or SurfaceSupport</param>
+        /// <param name="overwrite"></param>
         private void AddSupport(ISupportElement obj, bool overwrite)
         {
             if (obj == null)
@@ -2420,6 +2442,48 @@ private void AddSurfaceSupportLibItem(Releases.RigidityDataLibType1 obj, bool ov
             this.SurfaceSupportTypes.PredefinedTypes.Add(obj);
         }
 
+
+        /// <summary>
+        /// Add SurfaceSupport to Model.
+        /// </summary>
+        private void AddStiffnessPoint(Supports.StiffnessPoint obj, bool overwrite)
+        {
+            // in model?
+            bool inModel = this.StiffnessPointInModel(obj);
+
+            // in model, don't overwrite
+            if (inModel && !overwrite)
+            {
+                throw new System.ArgumentException($"{obj.GetType().FullName} with guid: {obj.Guid} has already been added to model. Are you adding the same element twice?");
+            }
+
+            // in model, overwrite
+            else if (inModel && overwrite)
+            {
+                this.Entities.Supports.StiffnessPoint.RemoveAll(x => x.Guid == obj.Guid);
+            }
+
+            // add obj
+            this.Entities.Supports.StiffnessPoint.Add(obj);
+        }
+
+
+        /// <summary>
+        /// Check if StiffnessPoint in Model.
+        /// </summary>
+        private bool StiffnessPointInModel(Supports.StiffnessPoint obj)
+        {
+            foreach (Supports.StiffnessPoint elem in this.Entities.Supports.StiffnessPoint)
+            {
+                if (elem.Guid == obj.Guid)
+                {
+                    return true;
+                }
+            }
+            return false;
+        }
+
+
         /// <summary>
         /// Add Material to Model.
         /// </summary>
@@ -2797,6 +2861,8 @@ public Model AddElements<T>(IEnumerable<T> elements, bool overwrite = true) wher
                 }
                 catch (Microsoft.CSharp.RuntimeBinder.RuntimeBinderException exeption)
                 {
+                    if (item == null)
+                        throw new ArgumentNullException("Can not add null element to model.", exeption);
                     throw new System.NotImplementedException($"Class Model don't have a method AddEntity that accepts {item.GetType()}. ", exeption);
                 }
             }
@@ -2819,7 +2885,16 @@ public Model AddLoads<T>(IEnumerable<T> elements, bool overwrite = true) where T
 
             foreach (var item in elements)
             {
-                AddEntity(item as dynamic, overwrite);
+                try
+                {
+                    AddEntity(item as dynamic, overwrite);
+                }
+                catch (Microsoft.CSharp.RuntimeBinder.RuntimeBinderException exeption)
+                {
+                    if (item == null)
+                        throw new ArgumentNullException("Can not add null load to model.", exeption);
+                    throw new System.NotImplementedException($"Class Model don't have a method AddEntity that accepts {item.GetType()}. ", exeption);
+                }
             }
 
             return this;
@@ -2842,7 +2917,16 @@ public Model AddSupports<T>(IEnumerable<T> elements, bool overwrite = true) wher
 
             foreach (var item in elements)
             {
-                AddEntity(item as dynamic, overwrite);
+                try
+                {
+                    AddEntity(item as dynamic, overwrite);
+                }
+                catch (Microsoft.CSharp.RuntimeBinder.RuntimeBinderException exeption)
+                {
+                    if (item == null)
+                        throw new ArgumentNullException("Can not add null support to model.", exeption);
+                    throw new System.NotImplementedException($"Class Model don't have a method AddEntity that accepts {item.GetType()}. ", exeption);
+                }
             }
 
             return this;
@@ -2868,6 +2952,7 @@ public Model AddSupports<T>(IEnumerable<T> elements, bool overwrite = true) wher
         private void AddEntity(Supports.PointSupport obj, bool overwrite) => AddPointSupport(obj, overwrite);
         private void AddEntity(Supports.LineSupport obj, bool overwrite) => AddLineSupport(obj, overwrite);
         private void AddEntity(Supports.SurfaceSupport obj, bool overwrite) => AddSurfaceSupport(obj, overwrite);
+        private void AddEntity(Supports.StiffnessPoint obj, bool overwrite) => AddStiffnessPoint(obj, overwrite);
 
         private void AddEntity(StructureGrid.Axis axis, bool overwrite) => AddAxis(axis, overwrite);
         private void AddEntity(StructureGrid.Storey storey, bool overwrite) => AddStorey(storey, overwrite);
@@ -3355,7 +3440,9 @@ internal void GetConstructionStages()
             {
                 i++; // Starts at 1
                 stage.Id = i;
-                stage.Elements = elementsPerStage[i];
+
+                if (elementsPerStage.ContainsKey(i))
+                    stage.Elements = elementsPerStage[i];
 
                 if (stage.ActivatedLoadCases != null)
                 {
@@ -3372,6 +3459,27 @@ internal void GetConstructionStages()
                 }
             }
         }
+        internal void GetLoadCombinations()
+        {
+            var loadCasesMap = this.Entities.Loads.LoadCases?.ToDictionary(lc => lc.Guid);
+            var stageMap = this.ConstructionStages?.Stages?.ToDictionary(s => s.Id);
+
+            foreach (var lComb in this.Entities.Loads.LoadCombinations)
+            {
+                foreach (Loads.ModelLoadCase mLoadCase in lComb.ModelLoadCase)
+                {
+                    if (mLoadCase.IsMovingLoadLoadCase)
+                        continue;
+
+                    mLoadCase.LoadCase = loadCasesMap[mLoadCase.Guid].DeepClone();
+                }
+
+                if (lComb.StageLoadCase != null && lComb.StageLoadCase.IsFinalStage == false)
+                {
+                    lComb.StageLoadCase.Stage = stageMap[lComb.StageLoadCase.StageIndex].DeepClone();
+                }
+            }
+        }
         #endregion
     }
 }
diff --git a/FemDesign.Core/ModellingTools/ConnectedLines.cs b/FemDesign.Core/ModellingTools/ConnectedLines.cs
index 082978dda..905ea5c6d 100644
--- a/FemDesign.Core/ModellingTools/ConnectedLines.cs
+++ b/FemDesign.Core/ModellingTools/ConnectedLines.cs
@@ -6,10 +6,11 @@
 namespace FemDesign.ModellingTools
 {
     [System.Serializable]
-    public partial class ConnectedLines: EntityBase, IStructureElement
+    public partial class ConnectedLines: NamedEntityBase, IStructureElement
     {
         [XmlIgnore]
-        private static int _instance = 0;
+        private static int _connectedLineInstances = 0;
+        protected override int GetUniqueInstanceCount() => ++_connectedLineInstances;
 
         [XmlElement("edge" , Order = 1)]
         public Geometry.Edge[] Edges { get; set; }
@@ -58,23 +59,6 @@ public Releases.RigidityDataLibType3 PredefRigidity
         
         [XmlElement("ref", Order = 7)]
         public GuidListType[] References { get; set; }
-        
-        [XmlAttribute("name")]
-        public string _name;
-
-        [XmlIgnore]
-        public string Name
-        {
-            get
-            {
-                return this._name;
-            }
-            set
-            {
-                _instance++;
-                this._name = $"{RestrictedString.Length(value, 50)}.{_instance.ToString()}";
-            }
-        }
 
         [XmlAttribute("moving_local")]
         public bool MovingLocal { get; set; }
@@ -131,7 +115,7 @@ public ConnectedLines(Geometry.Edge firstEdge, Geometry.Edge secondEdge, Geometr
             this.LocalY = localY;
             this.Rigidity = rigidity;
             this.References = references;
-            this.Name = identifier;
+            this.Identifier = identifier;
             this.MovingLocal = movingLocal;
             this.InterfaceStart = interfaceStart;
             this.InterfaceEnd = interfaceEnd;
diff --git a/FemDesign.Core/ModellingTools/ConnectedPoints.cs b/FemDesign.Core/ModellingTools/ConnectedPoints.cs
index ea1f4afb3..c20b139b6 100644
--- a/FemDesign.Core/ModellingTools/ConnectedPoints.cs
+++ b/FemDesign.Core/ModellingTools/ConnectedPoints.cs
@@ -9,10 +9,11 @@
 namespace FemDesign.ModellingTools
 {
     [System.Serializable]
-    public partial class ConnectedPoints : EntityBase, IStructureElement
+    public partial class ConnectedPoints : NamedEntityBase, IStructureElement
     {
         [XmlIgnore]
-        private static int _instance = 0;
+        private static int _connectedPointInstances = 0;
+        protected override int GetUniqueInstanceCount() => ++_connectedPointInstances;
 
         [XmlElement("point", Order = 1)]
         public Point3d[] _points;
@@ -74,23 +75,6 @@ public RigidityDataLibType2 PredefRigidity
         [XmlElement("ref", Order = 6)]
         public GuidListType[] References { get; set; }
 
-        [XmlAttribute("name")]
-        public string _name;
-
-        [XmlIgnore]
-        public string Name
-        {
-            get
-            {
-                return this._name;
-            }
-            set
-            {
-                _instance++;
-                this._name = $"{RestrictedString.Length(value, 50)}.{_instance.ToString()}";
-            }
-        }
-
         [XmlAttribute("interface")]
         public double _interface;
 
@@ -179,7 +163,7 @@ private void Initialize(Point3d firstPoint, Point3d secondPoint, RigidityDataTyp
             this.LocalY = Vector3d.UnitY;
             this.Rigidity = rigidity;
             this.References = references;
-            this.Name = identifier;
+            this.Identifier = identifier;
         }
     }
 }
diff --git a/FemDesign.Core/ModellingTools/Diaphragm.cs b/FemDesign.Core/ModellingTools/Diaphragm.cs
index cb4b5ef40..3beafa501 100644
--- a/FemDesign.Core/ModellingTools/Diaphragm.cs
+++ b/FemDesign.Core/ModellingTools/Diaphragm.cs
@@ -4,10 +4,11 @@
 namespace FemDesign.ModellingTools
 {
     [System.Serializable]
-    public partial class Diaphragm: EntityBase, IStructureElement, IStageElement
+    public partial class Diaphragm: NamedEntityBase, IStructureElement, IStageElement
     {
         [XmlIgnore]
-        private static int _instance = 0;
+        private static int _diaphragmInstances = 0;
+        protected override int GetUniqueInstanceCount() => ++_diaphragmInstances;
 
         [XmlElement("region", Order = 1)]
         public Geometry.Region Region { get; set; }
@@ -18,20 +19,6 @@ public partial class Diaphragm: EntityBase, IStructureElement, IStageElement
         [XmlAttribute("stage")]
         public int StageId { get; set; } = 1;
 
-        [XmlIgnore]
-        public string Name
-        {
-            get
-            {
-                return this._name;
-            }
-            set
-            {
-                Diaphragm._instance++;
-                this._name = $"{RestrictedString.Length(value, 50)}.{_instance}";
-            }
-        }
-
         private Diaphragm()
         {
 
@@ -44,7 +31,7 @@ public Diaphragm(Geometry.Region region, string identifier)
 
             // add properties
             this.Region = region;
-            this.Name = identifier;
+            this.Identifier = identifier;
         }        
     }
 }
diff --git a/FemDesign.Core/ModellingTools/FictitiousBar.cs b/FemDesign.Core/ModellingTools/FictitiousBar.cs
index ee5f5baa5..83b04f5a6 100644
--- a/FemDesign.Core/ModellingTools/FictitiousBar.cs
+++ b/FemDesign.Core/ModellingTools/FictitiousBar.cs
@@ -7,10 +7,11 @@
 namespace FemDesign.ModellingTools
 {
     [System.Serializable]
-    public partial class FictitiousBar: EntityBase, IStructureElement
+    public partial class FictitiousBar: NamedEntityBase, IStructureElement
     {
         [XmlIgnore]
-        private static int Instance = 0;
+        private static int _ficticiousBarInstances = 0;
+        protected override int GetUniqueInstanceCount() => ++_ficticiousBarInstances;
 
         [XmlElement("edge", Order = 1)]
         public Geometry.Edge Edge { get; set; }
@@ -113,23 +114,6 @@ public Bars.Connectivity EndConnectivity
             }
         }
 
-        [XmlAttribute("name")]
-        public string _name;
-
-        [XmlIgnore]
-        public string Name
-        { 
-            get
-            {
-                return this._name;
-            }
-            set
-            {
-                FictitiousBar.Instance++;
-                this._name = RestrictedString.Length(value, 40) + "." + FictitiousBar.Instance.ToString();
-            }
-        }
-
         [XmlAttribute("AE")]
         public double _ae;
 
@@ -205,14 +189,14 @@ private FictitiousBar()
         /// <summary>
         /// Internal constructor.
         /// </summary>
-        public FictitiousBar(Geometry.Edge edge, Geometry.Vector3d localY, Bars.Connectivity startConnectivity, Bars.Connectivity endConnectivity, string name, double ae, double itg, double i1e, double i2e)
+        public FictitiousBar(Geometry.Edge edge, Geometry.Vector3d localY, Bars.Connectivity startConnectivity, Bars.Connectivity endConnectivity, string identifier, double ae, double itg, double i1e, double i2e)
         {
             this.EntityCreated();
             this.Edge = edge;
             this.LocalY = localY;
             this.StartConnectivity = startConnectivity;
             this.EndConnectivity = endConnectivity;
-            this.Name = name;
+            this.Identifier = identifier;
             this.AE = ae;
             this.ItG = itg;
             this.I1E = i1e;
@@ -221,7 +205,7 @@ public FictitiousBar(Geometry.Edge edge, Geometry.Vector3d localY, Bars.Connecti
 
         /// <summary>
         /// Orient this object's coordinate system to GCS.
-        /// <summary>
+        /// </summary>
         public void OrientCoordinateSystemToGCS()
         {
             var cs = this.CoordinateSystem;
diff --git a/FemDesign.Core/ModellingTools/FictitiousShell.cs b/FemDesign.Core/ModellingTools/FictitiousShell.cs
index 67cd1f1a8..b54026674 100644
--- a/FemDesign.Core/ModellingTools/FictitiousShell.cs
+++ b/FemDesign.Core/ModellingTools/FictitiousShell.cs
@@ -6,11 +6,13 @@
 namespace FemDesign.ModellingTools
 {
     [System.Serializable]
-    public partial class FictitiousShell: EntityBase, IStructureElement
+    public partial class FictitiousShell: NamedEntityBase, IStructureElement
     {
         
         [XmlIgnore]
-        private static int Instance = 0;
+        private static int _ficticiousShellInstances = 0;
+        protected override int GetUniqueInstanceCount() => ++_ficticiousShellInstances;
+
 
         [XmlIgnore]
         private Geometry.CoordinateSystem _coordinateSystem;
@@ -128,26 +130,6 @@ public Geometry.Vector3d LocalZ
         [XmlElement("shear_stiffness", Order=7)]
         public StiffnessMatrix2Type ShearStiffness { get; set; }
 
-        /// <summary>
-        /// Identifier. Default FS.
-        /// </summary>
-        [XmlAttribute("name")]
-        public string _name;
-
-        [XmlIgnore]
-        public string Name
-        { 
-            get
-            {
-                return this._name;
-            }
-            set
-            {
-                FictitiousShell.Instance++;
-                this._name = RestrictedString.Length(value, 40) + "." + FictitiousShell.Instance.ToString();
-            }
-        }
-
         /// <summary>
         /// Density in t/m2
         /// </summary>
@@ -285,6 +267,7 @@ private FictitiousShell()
         /// <param name="alpha2"></param>
         /// <param name="ignoreInStImpCalc"></param>
         /// <param name="identifier"></param>
+        /// <param name="meshSize"></param>
         public FictitiousShell(Geometry.Region region, StiffnessMatrix4Type membraneStiffness, StiffnessMatrix4Type flexuralStiffness, StiffnessMatrix2Type shearStiffness, double density, double t1, double t2, double alpha1, double alpha2, bool ignoreInStImpCalc, double meshSize, string identifier)
         {
             this.EntityCreated();
@@ -300,7 +283,7 @@ public FictitiousShell(Geometry.Region region, StiffnessMatrix4Type membraneStif
             this.Alpha2 = alpha2;
             this.IgnoreInStImpCalculation = ignoreInStImpCalc;
             this.MeshSize = meshSize;
-            this.Name = identifier;
+            this.Identifier = identifier;
         }
 
         /// <summary>
diff --git a/FemDesign.Core/ModellingTools/SurfaceConnection.cs b/FemDesign.Core/ModellingTools/SurfaceConnection.cs
index 3574ff2f7..0d0b892bc 100644
--- a/FemDesign.Core/ModellingTools/SurfaceConnection.cs
+++ b/FemDesign.Core/ModellingTools/SurfaceConnection.cs
@@ -6,10 +6,11 @@
 namespace FemDesign.ModellingTools
 {
     [System.Serializable]
-    public partial class SurfaceConnection: EntityBase, IStructureElement
+    public partial class SurfaceConnection: NamedEntityBase, IStructureElement
     {
         [XmlIgnore]
-        private static int _instance = 0;
+        private static int _surfaceConnectionInstances = 0;
+        protected override int GetUniqueInstanceCount() => ++_surfaceConnectionInstances;
 
         [XmlElement("region", Order = 1)]
         public Geometry.Region Region { get; set; }
@@ -46,23 +47,6 @@ public Releases.RigidityDataLibType1 PredefRigidity
         [XmlElement("local_system", Order = 5)]
         public Geometry.CoordinateSystem CoordinateSystem { get; set; }
 
-        [XmlAttribute("name")]
-        public string _name;
-
-        [XmlIgnore]
-        public string Name
-        {
-            get
-            {
-                return this._name;
-            }
-            set
-            {
-                _instance++;
-                this._name = $"{RestrictedString.Length(value, 50)}.{_instance.ToString()}";
-            }
-        }
-
         [XmlAttribute("distance")]
         public double _distance;
 
diff --git a/FemDesign.Core/Properties/GlobalAssemblyInfo.cs b/FemDesign.Core/Properties/GlobalAssemblyInfo.cs
index 205c3c20a..06c6720ff 100644
--- a/FemDesign.Core/Properties/GlobalAssemblyInfo.cs
+++ b/FemDesign.Core/Properties/GlobalAssemblyInfo.cs
@@ -23,5 +23,5 @@
 //      Revision
 //
 
-[assembly: AssemblyVersion("21.4.0.0")]
-[assembly: AssemblyFileVersion("21.4.0.0")]
+[assembly: AssemblyVersion("21.5.0.0")]
+[assembly: AssemblyFileVersion("21.5.0.0")]
diff --git a/FemDesign.Core/Reinforcement/HiddenBar.cs b/FemDesign.Core/Reinforcement/HiddenBar.cs
index 156f20451..6cd7a122a 100644
--- a/FemDesign.Core/Reinforcement/HiddenBar.cs
+++ b/FemDesign.Core/Reinforcement/HiddenBar.cs
@@ -6,10 +6,11 @@
 namespace FemDesign.Reinforcement
 {
     [System.Serializable]
-    public partial class HiddenBar: EntityBase, IStructureElement
+    public partial class HiddenBar: NamedEntityBase, IStructureElement
     {   
         
-        private static int _instance = 0;
+        private static int _hiddenBarInstances = 0;
+        protected override int GetUniqueInstanceCount() => ++_hiddenBarInstances;
 
         [XmlElement("rectangle", Order = 1)]
         public Geometry.RectangleType Rectangle { get; set; }
@@ -20,23 +21,6 @@ public partial class HiddenBar: EntityBase, IStructureElement
         [XmlElement("end", Order = 3)]
         public string End = "";
 
-        [XmlAttribute("name")]
-        public string _name;
-
-        [XmlIgnore]
-        public string Name
-        {
-            get
-            {
-                return this._name;
-            }
-            set
-            {
-                HiddenBar._instance++;
-                this._name = RestrictedString.Length(value, 50) + HiddenBar._instance.ToString();
-            }
-        }
-
         [XmlAttribute("base_shell")]
         public Guid BaseShell { get; set; }
     }
diff --git a/FemDesign.Core/Reinforcement/LongitudinalBar.cs b/FemDesign.Core/Reinforcement/LongitudinalBar.cs
index 7a27c091c..34edd0260 100644
--- a/FemDesign.Core/Reinforcement/LongitudinalBar.cs
+++ b/FemDesign.Core/Reinforcement/LongitudinalBar.cs
@@ -36,8 +36,12 @@ public LongitudinalBar()
         /// <summary>
         /// Construct longitudinal bar using start and end distance from bar start
         /// </summary>
+        /// <param name="position"></param>
         /// <param name="startAnchorage">Start anchorage in meters.</param>
         /// <param name="endAnchorage">End anchorage in meters.</param>
+        /// <param name="start"></param>
+        /// <param name="end"></param>
+        /// <param name="auxiliary"></param>
         public LongitudinalBar(Geometry.Point2d position, double startAnchorage, double endAnchorage, double start, double end, bool auxiliary)
         {
             this.Position2d = position;
@@ -50,8 +54,13 @@ public LongitudinalBar(Geometry.Point2d position, double startAnchorage, double
         /// <summary>
         /// Construct longitudinal bar using start and end param from bar start
         /// </summary>
+        /// <param name="bar"></param>
+        /// <param name="position"></param>
         /// <param name="startAnchorage">Start anchorage in meters.</param>
         /// <param name="endAnchorage">End anchorage in meters.</param>
+        /// <param name="startParam"></param>
+        /// <param name="endParam"></param>
+        /// <param name="auxiliary"></param>
         public LongitudinalBar(Bars.Bar bar, Geometry.Point2d position, double startAnchorage, double endAnchorage, double startParam, double endParam, bool auxiliary)
         {
             this.Position2d = position;
diff --git a/FemDesign.Core/Reinforcement/Ptc.cs b/FemDesign.Core/Reinforcement/Ptc.cs
index fd7d78e0a..1ad7c3b1f 100644
--- a/FemDesign.Core/Reinforcement/Ptc.cs
+++ b/FemDesign.Core/Reinforcement/Ptc.cs
@@ -409,6 +409,8 @@ private Ptc()
         /// <param name="losses"></param>
         /// <param name="manufacturing"></param>
         /// <param name="strand"></param>
+        /// <param name="jackingSide"></param>
+        /// <param name="jackingStress"></param>
         /// <param name="numberOfStrands"></param>
         /// <param name="identifier"></param>
         public Ptc(Bars.Bar bar, PtcShapeType shape, PtcLosses losses, PtcManufacturingType manufacturing, PtcStrandLibType strand, JackingSide jackingSide, double jackingStress, int numberOfStrands = 3, string identifier = "PTC")
@@ -431,6 +433,8 @@ public Ptc(Bars.Bar bar, PtcShapeType shape, PtcLosses losses, PtcManufacturingT
         /// <param name="losses"></param>
         /// <param name="manufacturing"></param>
         /// <param name="strand"></param>
+        /// <param name="jackingSide"></param>
+        /// <param name="jackingStress"></param>
         /// <param name="numberOfStrands"></param>
         /// <param name="identifier"></param>
         public Ptc(Shells.Slab slab, Geometry.LineSegment line, PtcShapeType shape, PtcLosses losses, PtcManufacturingType manufacturing, PtcStrandLibType strand, JackingSide jackingSide, double jackingStress, int numberOfStrands = 3, string identifier = "PTC")
@@ -483,6 +487,7 @@ private PtcStrandLibType()
         /// <summary>
         /// Create a custom PTC-strand.
         /// </summary>
+        /// <param name="name"></param>
         /// <param name="f_pk">f pk [N/mm2]</param>
         /// <param name="a_p">A p [mm2]</param>
         /// <param name="e_p">E p [N/mm2]</param>
diff --git a/FemDesign.Core/Releases/RigidityDataType0.cs b/FemDesign.Core/Releases/RigidityDataType0.cs
new file mode 100644
index 000000000..479558dd3
--- /dev/null
+++ b/FemDesign.Core/Releases/RigidityDataType0.cs
@@ -0,0 +1,44 @@
+// https://strusoft.com/
+
+using System.Xml.Serialization;
+
+
+namespace FemDesign.Releases
+{
+    /// <summary>
+    /// rigidity_data_type1
+    /// </summary>
+    [System.Serializable]
+    public partial class RigidityDataType0
+    {
+        [XmlElement("motions", Order = 1)]
+        public Releases.Motions Motions { get; set; }
+        [XmlElement("plastic_limit_forces", Order = 2)]
+        public Releases.MotionsPlasticLimits PlasticLimitForces { get; set; }
+
+        /// <summary>
+        /// Parameterless constructor for serialization
+        /// </summary>
+        public RigidityDataType0()
+        {
+
+        }
+
+        /// <summary>
+        /// Construct RigidityDataType1 with motions only
+        /// </summary>
+        public RigidityDataType0(Motions motions)
+        {
+            this.Motions = motions;
+        }
+
+        /// <summary>
+        /// Construct RigidityDataType1 with motions and plastic limits forces only
+        /// </summary>
+        public RigidityDataType0(Motions motions, MotionsPlasticLimits motionsPlasticLimits)
+        {
+            this.Motions = motions;
+            this.PlasticLimitForces = motionsPlasticLimits;
+        }
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Core/Sections/Section.cs b/FemDesign.Core/Sections/Section.cs
index 2a2c78f4f..8341010c5 100644
--- a/FemDesign.Core/Sections/Section.cs
+++ b/FemDesign.Core/Sections/Section.cs
@@ -87,7 +87,7 @@ internal string _sectionName
 
         /// <summary>
         /// Parameterless constructor for serialization
-        /// <summary>
+        /// </summary>
         private Section()
         {
 
@@ -95,7 +95,8 @@ private Section()
 
         /// <summary>
         /// Construct a new section
-        /// <summary>
+        /// </summary>
+        [Obsolete("Consider use the other constructor. 'Name' shouldn't be set.")]
         public Section(Geometry.RegionGroup regionGroup, string name, string type, Materials.MaterialTypeEnum materialTypeEnum, string groupName, string typeName, string sizeName)
         {
             this.EntityCreated();
@@ -109,6 +110,22 @@ public Section(Geometry.RegionGroup regionGroup, string name, string type, Mater
             this._end = "";
         }
 
+        /// <summary>
+        /// Construct a new section
+        /// </summary>
+        public Section(Geometry.RegionGroup regionGroup, string type, Materials.MaterialTypeEnum materialTypeEnum, string groupName, string typeName, string sizeName)
+        {
+            this.EntityCreated();
+            this.RegionGroup = regionGroup;
+            this.Name = $"{groupName}, {typeName}, {sizeName}";
+            this.Type = type;
+            this.MaterialType = ((int)materialTypeEnum).ToString();
+            this.GroupName = groupName;
+            this.TypeName = typeName;
+            this.SizeName = sizeName;
+            this._end = "";
+        }
+
 
         [XmlIgnore]
         public string MaterialFamily
@@ -141,7 +158,7 @@ public static Section GetSectionByNameOrIndex(List<Section> sections, dynamic se
                 }
                 catch (Exception ex)
                 {
-                    throw new Exception($"{sectionInput} does not exist!");
+                    throw new Exception($"{sectionInput} does not exist!", ex);
                 }
             }
             else
@@ -152,7 +169,7 @@ public static Section GetSectionByNameOrIndex(List<Section> sections, dynamic se
                 }
                 catch (Exception ex)
                 {
-                    throw new System.Exception($"Materials List only contains {sections.Count} item. {sectionInput} is out of range!");
+                    throw new System.Exception($"Materials List only contains {sections.Count} item. {sectionInput} is out of range!", ex);
                 }
             }
             return section;
diff --git a/FemDesign.Core/Shells/Panel.cs b/FemDesign.Core/Shells/Panel.cs
index 28b36f742..9935e4dfd 100644
--- a/FemDesign.Core/Shells/Panel.cs
+++ b/FemDesign.Core/Shells/Panel.cs
@@ -11,12 +11,13 @@ namespace FemDesign.Shells
     /// panel_type
     /// </summary>
     [System.Serializable]
-    public partial class Panel: EntityBase, IStructureElement, IStageElement
+    public partial class Panel: NamedEntityBase, IStructureElement, IStageElement
     {
         /// <summary>
         /// Panel instance counter
         /// </summary>
-        private static int _instance = 0;
+        private static int _panelInstances = 0;
+        protected override int GetUniqueInstanceCount() => ++_panelInstances;
 
         /// <summary>
         /// Coordinate system
@@ -252,31 +253,6 @@ public Sections.Section Section
                 return this._section;
             }
         }
-        [XmlAttribute("name")]
-        public string _name; // identifier
-        [XmlIgnore]
-        public string Instance
-        {
-            get
-            {
-                var found = this.Name.IndexOf(".");
-                return this.Name.Substring(found + 1);
-            }
-        }
-        [XmlIgnore]
-        public string Name
-        {
-            get
-            {
-                return this._name;
-            }
-            set
-            {
-                Panel._instance++;
-                this._name = RestrictedString.Length(value, 50) + "." + Panel._instance.ToString();
-            }
-        }
-        public string Identifier => this.Name.Split('.')[0];
 
         [XmlAttribute("panelname")]
         public string PanelName { get; set; }
@@ -347,6 +323,26 @@ public double UniformAvgMeshSize
         [XmlAttribute("stage")]
         public int StageId { get; set; } = 1;
 
+
+        [XmlAttribute("ignored_distance")]
+        public double _ignoredDistance = 0.02;
+
+        [XmlIgnore]
+        public double IgnoredDistance
+        {
+            get
+            {
+                return this._ignoredDistance;
+            }
+            set
+            {
+                this._ignoredDistance = RestrictedDouble.NonNegMax_1000(value);
+            }
+        }
+
+        [XmlAttribute("ignored_in_stability")]
+        public bool IgnoredInStability { get; set; } = false;
+
         /// <summary>
         /// Set external edge connections (i.e. set edge connections around region). 
         /// When this is performed for panels the external rigidity is changed accordingly.
@@ -434,18 +430,18 @@ private Panel()
         /// Construct standard panel with "Continuous" analytical model.
         /// </summary>
         /// <param name="region">Region of shell containing panels.</param>
-        /// <param name="localX">Direction of panels.</param>
         /// <param name="anchorPoint"></param>
-        /// <param name="externalRigidity">Default value for shell border EdgeConnections. Can be overwritten by EdgeConnection for each specific edge in Region.</param>
         /// <param name="type">Type of panel.</param>
-        /// <param name="complexMaterial">Guid reference to material.</param>
-        /// <param name="complexSection">Guid reference to complex section.</param>
         /// <param name="identifier">Name of shell.</param>
         /// <param name="panelName">Name of panel.</param>
         /// <param name="gap">Gap between panels.</param>
         /// <param name="orthotropy">Orthotropy.</param>
         /// <param name="ecc">ShellEccentricity.</param>
         /// <param name="externalMovingLocal">EdgeConnection LCS changes along edge?</param>
+        /// <param name="internalPanels"></param>
+        /// <param name="externalEdgeConnection"></param>
+        /// <param name="material"></param>
+        /// <param name="section"></param>
         internal Panel(Geometry.Region region, Geometry.Point3d anchorPoint, InternalPanels internalPanels, EdgeConnection externalEdgeConnection, PanelType type, Materials.Material material, Sections.Section section, string identifier, string panelName, double gap, double orthotropy, ShellEccentricity ecc, bool externalMovingLocal)
         {
             this.EntityCreated();
@@ -464,7 +460,7 @@ internal Panel(Geometry.Region region, Geometry.Point3d anchorPoint, InternalPan
             this.Type = type;
             this.Material = material; // note that material and section are not added directly to complexMaterial and complexSection fields.
             this.Section = section;
-            this.Name = identifier;
+            this.Identifier = identifier;
             this.PanelName = panelName;
             this.Gap = gap;
             this.Orthotropy = orthotropy;
@@ -490,6 +486,7 @@ internal Panel(Geometry.Region region, Geometry.Point3d anchorPoint, InternalPan
         /// <param name="orthotropy">Orthotropy.</param>
         /// <param name="ecc">ShellEccentricity.</param>
         /// <param name="externalMovingLocal">EdgeConnection LCS changes along edge?</param>
+        /// <param name="panelWidth"></param>
         internal Panel(Geometry.Region region, Geometry.Point3d anchorPoint, InternalPanels internalPanels, Materials.TimberPanelType timberApplicationData, EdgeConnection externalEdgeConnection, PanelType type, string identifier, string panelName, double gap, double orthotropy, ShellEccentricity ecc, bool externalMovingLocal, double panelWidth)
         {
             this.EntityCreated();
@@ -508,7 +505,7 @@ internal Panel(Geometry.Region region, Geometry.Point3d anchorPoint, InternalPan
 
             // attributes
             this.Type = type;
-            this.Name = identifier;
+            this.Identifier = identifier;
             this.PanelName = panelName;
             this.Gap = gap;
             this.Alignment = ecc.Alignment;
diff --git a/FemDesign.Core/Shells/ShellEccentricity.cs b/FemDesign.Core/Shells/ShellEccentricity.cs
index d16eb8cee..29e68a1d0 100644
--- a/FemDesign.Core/Shells/ShellEccentricity.cs
+++ b/FemDesign.Core/Shells/ShellEccentricity.cs
@@ -6,7 +6,6 @@ namespace FemDesign.Shells
 {
     public partial class ShellEccentricity
     {
-        private string _alignment; // ver_align
         public VerticalAlignment Alignment { get; set; }
         private double _eccentricity; // align_offset // abs_max_1e20
         public double Eccentricity
diff --git a/FemDesign.Core/Shells/Slab.cs b/FemDesign.Core/Shells/Slab.cs
index b13ca3bbd..aa3470f9e 100644
--- a/FemDesign.Core/Shells/Slab.cs
+++ b/FemDesign.Core/Shells/Slab.cs
@@ -12,29 +12,31 @@ namespace FemDesign.Shells
     /// slab_type
     /// </summary>
     [System.Serializable]
-    public partial class Slab : EntityBase, IStructureElement, IStageElement
+    public partial class Slab : EntityBase, INamedEntity, IStructureElement, IStageElement
     {
-        private static int _plateInstance = 0;
-        private static int _wallInstance = 0;
+        public string Name => this.SlabPart.Name.Substring(0, this.SlabPart.Name.Length - 2); // Remove trailing ".1" from barpart name
+        public int Instance => this.SlabPart.Instance;
+
+        [XmlIgnore]
+        public string Identifier
+        {
+            get => this.SlabPart.Identifier;
+            set => this.SlabPart.Identifier = value;
+        }
+        [XmlIgnore]
+        public bool LockedIdentifier
+        {
+            get => this.SlabPart.LockedIdentifier;
+            set => this.SlabPart.LockedIdentifier = value;
+        }
+
         [XmlIgnore]
         public Materials.Material Material { get; set; }
         [XmlIgnore]
         public Reinforcement.SurfaceReinforcementParameters SurfaceReinforcementParameters { get; set; }
         [XmlIgnore]
         public List<Reinforcement.SurfaceReinforcement> SurfaceReinforcement = new List<Reinforcement.SurfaceReinforcement>();
-        [XmlAttribute("name")]
-        public string Name { get; set; } // identifier
 
-        [XmlIgnore]
-        public string Instance
-        {
-            get
-            {
-                var found = this.Name.IndexOf(".");
-                return this.Name.Substring(found + 1);
-            }
-        }
-        public string Identifier => this.Name.Split('.')[0];
 
         [XmlAttribute("type")]
         public SlabType Type { get; set; }
@@ -71,32 +73,30 @@ private Slab()
         /// <summary>
         /// Construct Slab.
         /// </summary>
-        private Slab(SlabType type, string name, SlabPart slabPart, Materials.Material material)
+        private Slab(SlabType type, string identifier, SlabPart slabPart, Materials.Material material)
         {
             this.EntityCreated();
-            this.Name = name;
-            this.Type = type;
             this.SlabPart = slabPart;
+            this.Identifier = identifier;
+            this.Type = type;
             this.Material = material;
             this.End = "";
         }
 
         public static Slab Plate(string identifier, Materials.Material material, Geometry.Region region, EdgeConnection shellEdgeConnection, ShellEccentricity eccentricity, ShellOrthotropy orthotropy, List<Thickness> thickness)
         {
-            Slab._plateInstance++;
             SlabType type = SlabType.Plate;
-            string name = identifier + "." + Slab._plateInstance.ToString() + ".1";
-            SlabPart slabPart = SlabPart.Define(name, region, thickness, material, shellEdgeConnection, eccentricity, orthotropy);
-            name = identifier + "." + Slab._plateInstance.ToString();
-            Slab shell = new Slab(type, name, slabPart, material);
+            SlabPart slabPart = SlabPart.Define(type, identifier, region, thickness, material, shellEdgeConnection, eccentricity, orthotropy);
+            Slab shell = new Slab(type, identifier, slabPart, material);
             return shell;
         }
 
         /// <summary>
         /// Construct a rectangular slab in the XY plane
         /// </summary>
-        /// <param name="width"></param>
-        /// <param name="height"></param>
+        /// <param name="corner"></param>
+        /// <param name="widthX"></param>
+        /// <param name="widthY"></param>
         /// <param name="thickness"></param>
         /// <param name="material"></param>
         /// <param name="shellEdgeConnection"></param>
@@ -104,20 +104,17 @@ public static Slab Plate(string identifier, Materials.Material material, Geometr
         /// <param name="orthotropy"></param>
         /// <param name="identifier"></param>
         /// <returns></returns>
-        public static Slab Plate(double width, double height, double thickness, Materials.Material material, EdgeConnection shellEdgeConnection = null, ShellEccentricity eccentricity = null, ShellOrthotropy orthotropy = null, string identifier = "Plate")
+        public static Slab Plate(Geometry.Point3d corner, double widthX, double widthY, double thickness, Materials.Material material, EdgeConnection shellEdgeConnection = null, ShellEccentricity eccentricity = null, ShellOrthotropy orthotropy = null, string identifier = "Plate")
         {
-            Slab._plateInstance++;
             SlabType type = SlabType.Plate;
-            string name = identifier + "." + Slab._wallInstance.ToString() + ".1";
-            var region = Geometry.Region.RectangleXY(width, height);
+            var region = Geometry.Region.RectangleXY(corner, widthX, widthY);
 
             List<FemDesign.Shells.Thickness> thicknessObj = new List<FemDesign.Shells.Thickness>();
             thicknessObj.Add(new FemDesign.Shells.Thickness(region.CoordinateSystem.Origin, thickness));
 
-            SlabPart slabPart = SlabPart.Define(name, region, thicknessObj, material, shellEdgeConnection, eccentricity, orthotropy);
-            name = identifier + "." + Slab._plateInstance.ToString();
+            SlabPart slabPart = SlabPart.Define(type, identifier, region, thicknessObj, material, shellEdgeConnection, eccentricity, orthotropy);
 
-            Slab shell = new Slab(type, name, slabPart, material);
+            Slab shell = new Slab(type, identifier, slabPart, material);
             return shell;
         }
 
@@ -136,14 +133,12 @@ public static Slab Plate(double width, double height, double thickness, Material
         /// <returns></returns>
         public static Slab Wall(Geometry.Point3d point0, Geometry.Point3d point1, double height, double thickness, Materials.Material material, EdgeConnection shellEdgeConnection = null, ShellEccentricity eccentricity = null, ShellOrthotropy orthotropy = null, string identifier = "Wall")
         {
-            Slab._plateInstance++;
             SlabType type = SlabType.Wall;
-            string name = identifier + "." + Slab._wallInstance.ToString() + ".1";
 
             var translation = new Geometry.Vector3d(0, 0, height);
             var point2 = point1 + translation;
             var point3 = point0 + translation;
-            var points = new List<FemDesign.Geometry.Point3d>() { point0, point1, point2, point3};
+            var points = new List<FemDesign.Geometry.Point3d>() { point0, point1, point2, point3 };
 
             var fdCoordinate = new Geometry.CoordinateSystem(point0, point1, point3);
 
@@ -153,10 +148,9 @@ public static Slab Wall(Geometry.Point3d point0, Geometry.Point3d point1, double
             List<FemDesign.Shells.Thickness> thicknessObj = new List<FemDesign.Shells.Thickness>();
             thicknessObj.Add(new FemDesign.Shells.Thickness(region.CoordinateSystem.Origin, thickness));
 
-            SlabPart slabPart = SlabPart.Define(name, region, thicknessObj, material, shellEdgeConnection, eccentricity, orthotropy);
-            name = identifier + "." + Slab._plateInstance.ToString();
+            SlabPart slabPart = SlabPart.Define(type, identifier, region, thicknessObj, material, shellEdgeConnection, eccentricity, orthotropy);
 
-            Slab shell = new Slab(type, name, slabPart, material);
+            Slab shell = new Slab(type, identifier, slabPart, material);
             return shell;
         }
 
@@ -176,9 +170,7 @@ public static Slab Wall(Geometry.Point3d point0, Geometry.Point3d point1, double
         /// <returns></returns>
         public static Slab FromFourPoints(Geometry.Point3d point0, Geometry.Point3d point1, Geometry.Point3d point2, Geometry.Point3d point3, double thickness, Materials.Material material, EdgeConnection shellEdgeConnection = null, ShellEccentricity eccentricity = null, ShellOrthotropy orthotropy = null, string identifier = "Plate")
         {
-            Slab._plateInstance++;
             SlabType type = SlabType.Plate;
-            string name = identifier + "." + Slab._wallInstance.ToString() + ".1";
 
             var points = new List<Geometry.Point3d>() { point0, point1, point2, point3 };
             var fdCoordinate = new Geometry.CoordinateSystem(point0, point1, point3);
@@ -187,10 +179,9 @@ public static Slab FromFourPoints(Geometry.Point3d point0, Geometry.Point3d poin
             List<FemDesign.Shells.Thickness> thicknessObj = new List<FemDesign.Shells.Thickness>();
             thicknessObj.Add(new FemDesign.Shells.Thickness(region.CoordinateSystem.Origin, thickness));
 
-            SlabPart slabPart = SlabPart.Define(name, region, thicknessObj, material, shellEdgeConnection, eccentricity, orthotropy);
-            name = identifier + "." + Slab._plateInstance.ToString();
+            SlabPart slabPart = SlabPart.Define(type, identifier, region, thicknessObj, material, shellEdgeConnection, eccentricity, orthotropy);
 
-            Slab shell = new Slab(type, name, slabPart, material);
+            Slab shell = new Slab(type, identifier, slabPart, material);
             return shell;
         }
 
@@ -203,41 +194,10 @@ public static Slab Wall(string identifier, Materials.Material material, Geometry
                 throw new System.ArgumentException("Wall is not vertical! Create plate instead.");
             }
 
-            Slab._wallInstance++;
-            SlabType type = SlabType.Wall;
-            string name = identifier + "." + Slab._wallInstance.ToString() + ".1";
-            SlabPart slabPart = SlabPart.Define(name, region, thickness, material, shellEdgeConnection, eccentricity, orthotropy);
-            name = identifier + "." + Slab._plateInstance.ToString();
-
-            Slab shell = new Slab(type, name, slabPart, material);
-            return shell;
-        }
-        /// <summary>
-        /// Construct a Wall Element in XZ plane
-        /// </summary>
-        /// <param name="width"></param>
-        /// <param name="height"></param>
-        /// <param name="thickness"></param>
-        /// <param name="material"></param>
-        /// <param name="shellEdgeConnection"></param>
-        /// <param name="eccentricity"></param>
-        /// <param name="orthotropy"></param>
-        /// <param name="identifier"></param>
-        /// <returns></returns>
-        public static Slab Wall(double width, double height, double thickness, Materials.Material material, EdgeConnection shellEdgeConnection = null, ShellEccentricity eccentricity = null, ShellOrthotropy orthotropy = null, string identifier = "Wall")
-        {
-            Slab._wallInstance++;
             SlabType type = SlabType.Wall;
-            string name = identifier + "." + Slab._wallInstance.ToString() + ".1";
-            var region = Geometry.Region.RectangleXZ(width, height);
-
-            List<FemDesign.Shells.Thickness> thicknessObj = new List<FemDesign.Shells.Thickness>();
-            thicknessObj.Add(new FemDesign.Shells.Thickness(region.CoordinateSystem.Origin, thickness));
-
-            SlabPart slabPart = SlabPart.Define(name, region, thicknessObj, material, shellEdgeConnection, eccentricity, orthotropy);
-            name = identifier + "." + Slab._plateInstance.ToString();
+            SlabPart slabPart = SlabPart.Define(type, identifier, region, thickness, material, shellEdgeConnection, eccentricity, orthotropy);
 
-            Slab shell = new Slab(type, name, slabPart, material);
+            Slab shell = new Slab(type, identifier, slabPart, material);
             return shell;
         }
 
diff --git a/FemDesign.Core/Shells/SlabPart.cs b/FemDesign.Core/Shells/SlabPart.cs
index 52b12dc00..21f26a54e 100644
--- a/FemDesign.Core/Shells/SlabPart.cs
+++ b/FemDesign.Core/Shells/SlabPart.cs
@@ -11,8 +11,26 @@ namespace FemDesign.Shells
     /// slab_part_type
     /// </summary>
     [System.Serializable]
-    public partial class SlabPart: EntityBase
-    { 
+    public partial class SlabPart: NamedEntityPartBase
+    {
+        private static int _plateInstance = 0;
+        private static int _wallInstance = 0;
+        protected override int GetUniqueInstanceCount()
+        {
+            switch (this.SlabType)
+            {
+                case SlabType.Plate:
+                    return ++_plateInstance;
+                case SlabType.Wall:
+                    return ++_wallInstance;
+                default:
+                    throw new ArgumentException($"Incorrect type of slab: {this.SlabType}");
+            }
+        }
+
+        [XmlIgnore]
+        public SlabType SlabType;
+
         /// <summary>
         /// Get ShellEccentricity
         /// </summary>
@@ -37,20 +55,6 @@ public ShellOrthotropy ShellOrthotropy
             }
         }
 
-        [XmlAttribute("name")]
-        public string Name {get; set;} // identifier
-        [XmlIgnore]
-        public string Instance
-        {
-            get
-            {
-                var found = this.Name.IndexOf(".");
-                return this.Name.Substring(found + 1);
-            }
-        }
-        public string Identifier => this.Name.Split('.')[0];
-
-
         [XmlAttribute("complex_material")]
         public System.Guid ComplexMaterialGuid {get; set;} // guidtype
 
@@ -194,7 +198,11 @@ public Geometry.Vector3d LocalZ
                 }
             }
         }
-        [XmlElement("end", Order = 6)]
+
+        [XmlElement(ElementName = "stiffness_modifiers", Order = 6)]
+        public SlabStiffnessFactors SlabStiffnessFactors { get; set; }
+
+        [XmlElement("end", Order = 7)]
         public string End {get; set;} // empty_type
 
         /// <summary>
@@ -208,10 +216,11 @@ private SlabPart()
         /// <summary>
         /// Construct SlabPart.
         /// </summary>
-        public SlabPart(string name, Geometry.Region region, List<Thickness> thickness, Materials.Material complexMaterial, ShellEccentricity alignment, ShellOrthotropy orthotropy)
+        public SlabPart(SlabType type, string identifier, Geometry.Region region, List<Thickness> thickness, Materials.Material complexMaterial, ShellEccentricity alignment, ShellOrthotropy orthotropy)
         {
             this.EntityCreated();
-            this.Name = name;
+            this.SlabType = type;
+            this.Identifier = identifier;
             this.Region = region;
             this.ComplexMaterialGuid = complexMaterial.Guid;
             this.ComplexMaterial = complexMaterial;
@@ -231,7 +240,7 @@ public SlabPart(string name, Geometry.Region region, List<Thickness> thickness,
         /// <summary>
         /// Construct SlabPart with EdgeConnections.
         /// </summary>
-        public static SlabPart Define(string name, Geometry.Region region, List<Thickness> thickness, Materials.Material material, EdgeConnection shellEdgeConnection = null, ShellEccentricity eccentricity = null, ShellOrthotropy orthotropy = null)
+        public static SlabPart Define(SlabType type, string identifier, Geometry.Region region, List<Thickness> thickness, Materials.Material material, EdgeConnection shellEdgeConnection = null, ShellEccentricity eccentricity = null, ShellOrthotropy orthotropy = null)
         {
             shellEdgeConnection = shellEdgeConnection ?? EdgeConnection.Default;
             eccentricity = eccentricity ?? ShellEccentricity.Default;
@@ -241,7 +250,7 @@ public static SlabPart Define(string name, Geometry.Region region, List<Thicknes
             region.SetEdgeConnections(shellEdgeConnection);
             
             // construct new slabPart
-            SlabPart slabPart = new SlabPart(name, region, thickness, material, eccentricity, orthotropy);
+            SlabPart slabPart = new SlabPart(type, identifier, region, thickness, material, eccentricity, orthotropy);
 
             // return
             return slabPart;
diff --git a/FemDesign.Core/Shells/SlabStiffnessFactors.cs b/FemDesign.Core/Shells/SlabStiffnessFactors.cs
new file mode 100644
index 000000000..9bf0bd2d6
--- /dev/null
+++ b/FemDesign.Core/Shells/SlabStiffnessFactors.cs
@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using System.Xml.Serialization;
+
+namespace FemDesign.Shells
+{
+    public partial class SlabStiffnessFactors
+    {
+        [XmlElement("factors")]
+        public List<StruSoft.Interop.StruXml.Data.Slab_stiffness_record> StiffnessModifiers { get; set; }
+    }
+}
diff --git a/FemDesign.Core/Stage/ActivatedLoadCase.cs b/FemDesign.Core/Stage/ActivatedLoadCase.cs
index f7b5bf573..a30540e10 100644
--- a/FemDesign.Core/Stage/ActivatedLoadCase.cs
+++ b/FemDesign.Core/Stage/ActivatedLoadCase.cs
@@ -6,6 +6,8 @@
 using System.Threading.Tasks;
 using System.Text.RegularExpressions;
 
+using FemDesign.GenericClasses;
+
 namespace FemDesign
 {
     public enum PTCLoadCase
@@ -69,12 +71,12 @@ private ActivatedLoadCase()
         /// </summary>
         /// <param name="loadCase">The load case to be activated.</param>
         /// <param name="factor">Load case factor.</param>
-        /// <param name="type">Activation type.</param>
-        public ActivatedLoadCase(Loads.LoadCase loadCase, double factor, ActivationType type)
+        /// <param name="partitioning">Partitioning.</param>
+        public ActivatedLoadCase(Loads.LoadCase loadCase, double factor, ActivationType partitioning)
         {
             this.LoadCaseDisplayName = loadCase.Name;
             this._case = loadCase.Guid.ToString();
-            Initialize(factor, type);
+            Initialize(factor, partitioning);
         }
 
         /// <summary>
@@ -127,21 +129,25 @@ public enum ActivationType
         /// <summary>
         /// Only in this stage
         /// </summary>
+        [Parseable("only_in_this_stage", "0", "OnlyInThisStage")]
         [XmlEnum("only_in_this_stage")]
         OnlyInThisStage,
         /// <summary>
         /// From this stage on
         /// </summary>
+        [Parseable("from_this_stage_on", "1", "FromThisStageOn")]
         [XmlEnum("from_this_stage_on")]
         FromThisStageOn,
         /// <summary>
         /// Shifted from first stage
         /// </summary>
+        [Parseable("shifted_from_first_stage", "2", "ShiftedFromFirstStage")]
         [XmlEnum("shifted_from_first_stage")]
         ShiftedFromFirstStage,
         /// <summary>
         /// Only stage activated elements
         /// </summary>
+        [Parseable("only_stage_activated_elem", "3", "OnlyStageActivatedElements")]
         [XmlEnum("only_stage_activated_elem")]
         OnlyStageActivatedElements
     }
diff --git a/FemDesign.Core/Stage/Stage.cs b/FemDesign.Core/Stage/Stage.cs
index 85973662f..83d81d806 100644
--- a/FemDesign.Core/Stage/Stage.cs
+++ b/FemDesign.Core/Stage/Stage.cs
@@ -6,6 +6,7 @@
 using System.Threading.Tasks;
 
 using FemDesign.GenericClasses;
+using FemDesign.Loads;
 
 namespace FemDesign
 {
@@ -35,7 +36,38 @@ private Stage()
 
         }
 
-        public Stage(int index, string description, List<ActivatedLoadCase> activatedLoadCases, List<IStageElement> elements, bool initialStressState = false)
+        /// <summary>
+        /// Construction stage.
+        /// </summary>
+        /// <param name="index"></param>
+        /// <param name="description">Stage description (name).</param>
+        /// <param name="activatedLoadCases">LoadCases with factor and partitioning for when to be activated.</param>
+        /// <param name="elements">Elements to be activated in this stage.</param>
+        /// <param name="initialStressState">Initial stress state.</param>
+        public Stage(int index, string description, List<ActivatedLoadCase> activatedLoadCases = null, List<IStageElement> elements = null, bool initialStressState = false)
+        {
+            Initialize(index, description, activatedLoadCases, elements, initialStressState);
+        }
+
+        /// <summary>
+        /// Construction stage.
+        /// </summary>
+        /// <param name="index"></param>
+        /// <param name="description">Stage description (name).</param>
+        /// <param name="loadCases">LoadCases to be activated (with factor 1.0).</param>
+        /// <param name="elements">Elements to be activated in this stage.</param>
+        /// <param name="partitioning">Partitioning for when to activate load cases.</param>
+        /// <param name="initialStressState">Initial stress state.</param>
+#if ISDYNAMO // Dynamo may not have any default enum arguments in any constructor in any imported C# libraries it seems like
+        public Stage(int index, string description, List<LoadCase> loadCases, List<IStageElement> elements, ActivationType partitioning, bool initialStressState = false)
+#else
+        public Stage(int index, string description, List<LoadCase> loadCases, List<IStageElement> elements, ActivationType partitioning = ActivationType.OnlyInThisStage, bool initialStressState = false)
+#endif
+        {
+            var activatedLoadCase = loadCases.Select(l => new ActivatedLoadCase(l, 1.0, partitioning)).ToList();
+            Initialize(index, description, activatedLoadCase, elements, initialStressState);
+        }
+        private void Initialize(int index, string description, List<ActivatedLoadCase> activatedLoadCases, List<IStageElement> elements, bool initialStressState)
         {
             if (index <= 0)
             {
@@ -48,6 +80,34 @@ public Stage(int index, string description, List<ActivatedLoadCase> activatedLoa
             this.InitialStressState = initialStressState;
         }
 
+        /// <summary>
+        /// Add element to construction stage.
+        /// </summary>
+        /// <param name="element">Element to be activated in this stage.</param>
+        public void AddElement(IStageElement element)
+        {
+            this.Elements.Add(element);
+        }
+
+        /// <summary>
+        /// Adds a (construction stage) activated load case.
+        /// </summary>
+        /// <param name="loadCase">The load case to be activated.</param>
+        /// <param name="factor">Load case factor.</param>
+        /// <param name="partitioning">Partitioning.</param>
+        public void AddLoadCase(LoadCase loadCase, double factor, ActivationType partitioning)
+        {
+            AddLoadCase(new ActivatedLoadCase(loadCase, factor, partitioning));
+        }
+
+        /// <summary>
+        /// Adds a (construction stage) activated load case.
+        /// </summary>
+        public void AddLoadCase(ActivatedLoadCase activatedLoadCase)
+        {
+            this.ActivatedLoadCases.Add(activatedLoadCase);
+        }
+
         public override string ToString()
         {
             return $"Stage {this.Description}";
diff --git a/FemDesign.Core/Supports/Group.cs b/FemDesign.Core/Supports/Group.cs
index 1ef05ac8e..c68100cd6 100644
--- a/FemDesign.Core/Supports/Group.cs
+++ b/FemDesign.Core/Supports/Group.cs
@@ -151,7 +151,7 @@ public Group(Geometry.Vector3d localX, Geometry.Vector3d localY, Motions motions
 
         /// <summary>
         /// Orient this object's coordinate system to GCS
-        /// <summary>
+        /// </summary>
         public void OrientCoordinateSystemToGCS()
         {
             var cs = this.CoordinateSystem;
diff --git a/FemDesign.Core/Supports/LineSupport.cs b/FemDesign.Core/Supports/LineSupport.cs
index 2c0d960b5..380e23e28 100644
--- a/FemDesign.Core/Supports/LineSupport.cs
+++ b/FemDesign.Core/Supports/LineSupport.cs
@@ -12,21 +12,9 @@ namespace FemDesign.Supports
     /// line_support_type
     /// </summary>
     [System.Serializable]
-    public partial class LineSupport: EntityBase, IStructureElement, ISupportElement, IStageElement
+    public partial class LineSupport: NamedEntityBase, IStructureElement, ISupportElement, IStageElement
     {
-        // serialization properties
-        [XmlAttribute("name")]
-        public string Name { get; set; } // identifier.
-        [XmlIgnore]
-        public string Instance
-        {
-            get
-            {
-                var found = this.Name.IndexOf(".");
-                return this.Name.Substring(found + 1);
-            }
-        }
-        public string Identifier => this.Name.Split('.')[0];
+        protected override int GetUniqueInstanceCount() => ++PointSupport._instance; // PointSupport and LineSupport share the same instance counter.
 
         [XmlAttribute("moving_local")]
         public bool MovingLocal { get; set; } // bool
@@ -143,9 +131,8 @@ public LineSupport(Edge edge, Motions motions, MotionsPlasticLimits motionsPlast
 
         private void Initialize(Edge edge, Group group, bool movingLocal, string identifier)
         {
-            PointSupport._instance++; // PointSupport and LineSupport share the same instance counter.
             this.EntityCreated();
-            this.Name = identifier + "." + PointSupport._instance.ToString();
+            this.Identifier = identifier;
             this.MovingLocal = movingLocal;
 
             // set edge specific properties
diff --git a/FemDesign.Core/Supports/PointSupport.cs b/FemDesign.Core/Supports/PointSupport.cs
index 7fb4abefc..c308f2120 100644
--- a/FemDesign.Core/Supports/PointSupport.cs
+++ b/FemDesign.Core/Supports/PointSupport.cs
@@ -11,23 +11,11 @@ namespace FemDesign.Supports
     /// point_support_type
     /// </summary>
     [System.Serializable]
-    public partial class PointSupport : EntityBase, IStructureElement, ISupportElement, IStageElement
+    public partial class PointSupport : NamedEntityBase, IStructureElement, ISupportElement, IStageElement
     {
         [XmlIgnore]
-        public static int _instance = 0; // used for PointSupports and LineSupports
-        [XmlAttribute("name")]
-        public string Name { get; set; } // identifier
-        [XmlIgnore]
-        public string Instance
-        {
-            get
-            {
-                var found = this.Name.IndexOf(".");
-                return this.Name.Substring(found + 1);
-            }
-        }
-        public string Identifier => this.Name.Split('.')[0];
-
+        internal static int _instance = 0; // Shared instance counter for both PointSupport and LineSupport
+        protected override int GetUniqueInstanceCount() => ++_instance;
 
         [XmlAttribute("stage")]
         public int StageId { get; set; } = 1;
@@ -99,10 +87,10 @@ public PointSupport(CoordinateSystem plane, Motions motions, Rotations rotations
         /// <summary>
         /// Create a Point Support oriented along the Global Axis X and Y.
         /// </summary>
-        /// <param name="point"></param>
-        /// <param name="motions"></param>
-        /// <param name="rotations"></param>
-        /// <param name="identifier"></param>
+        /// <param name="point">Position of the support. </param>
+        /// <param name="motions">Motions stiffnessess. </param>
+        /// <param name="rotations">Rotation stiffnessess. </param>
+        /// <param name="identifier">Name.</param>
         public PointSupport(Point3d point, Motions motions, Rotations rotations, string identifier = "S")
         {
             var group = new Group(Vector3d.UnitX, Vector3d.UnitY, motions, rotations);
@@ -112,7 +100,7 @@ public PointSupport(Point3d point, Motions motions, Rotations rotations, string
         /// <summary>
         /// PointSupport at point with rigidity (motions, rotations) and plastic limits (forces, moments). Group aligned with global coordinate system.
         /// </summary>
-        /// <param name="point">Position of the support. </param>
+        /// <param name="plane">Position (and orientation) of the support. </param>
         /// <param name="motions">Motions stiffnessess. </param>
         /// <param name="motionsPlasticLimits">Motions plastic limit forces. </param>
         /// <param name="rotations">Rotation stiffnessess. </param>
@@ -120,7 +108,7 @@ public PointSupport(Point3d point, Motions motions, Rotations rotations, string
         /// <param name="identifier">Name.</param>
         public PointSupport(CoordinateSystem plane, Motions motions, MotionsPlasticLimits motionsPlasticLimits, Rotations rotations, RotationsPlasticLimits rotationsPlasticLimits, string identifier = "S")
         {
-            var group = new Group(Vector3d.UnitX, Vector3d.UnitY, motions, motionsPlasticLimits, rotations, rotationsPlasticLimits);
+            var group = new Group(plane.LocalX, plane.LocalY, motions, motionsPlasticLimits, rotations, rotationsPlasticLimits);
             Initialize(plane, group, identifier);
         }
 
@@ -154,9 +142,8 @@ public PointSupport(CoordinateSystem plane, bool tx, bool ty, bool tz, bool rx,
 
         private void Initialize(CoordinateSystem point, Group group, string identifier)
         {
-            PointSupport._instance++;
             this.EntityCreated();
-            this.Name = $"{identifier}.{_instance}";
+            this.Identifier = identifier;
             this.Group = group;
             this.Position = point;
         }
diff --git a/FemDesign.Core/Supports/StiffnessPoints.cs b/FemDesign.Core/Supports/StiffnessPoints.cs
new file mode 100644
index 000000000..a2af17926
--- /dev/null
+++ b/FemDesign.Core/Supports/StiffnessPoints.cs
@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using System.Xml.Serialization;
+using FemDesign;
+using FemDesign.GenericClasses;
+using FemDesign.Releases;
+
+namespace FemDesign.Supports
+{
+	public partial class StiffnessPoint : EntityBase, IStructureElement, ISupportElement
+	{
+		[XmlIgnore]
+		public FemDesign.Geometry.Point3d Point { get; set; }
+
+		[XmlAttribute("x")]
+		public double X;
+
+		[XmlAttribute("y")]
+		public double Y;
+
+		[XmlAttribute("z")]
+		public double Z;
+
+		[XmlAttribute("name")]
+		public string Name { get; set; }
+
+		[XmlIgnore]
+		public FemDesign.Supports.SurfaceSupport Surface { get; set; }
+
+		[XmlAttribute("surface_support")]
+		public Guid SurfaceSupport;
+
+		[XmlElement("rigidity")]
+		public RigidityDataType0 Rigidity { get; set; }
+		public Motions Motions { get { return Rigidity?.Motions; } }
+		public MotionsPlasticLimits MotionsPlasticityLimits { get { return Rigidity?.PlasticLimitForces; } }
+
+		public StiffnessPoint()
+		{
+		}
+
+		private void Initialise(FemDesign.Supports.SurfaceSupport surface, FemDesign.Geometry.Point3d point)
+		{
+			this.SurfaceSupport = surface.Guid;
+			this.X = point.X;
+			this.Y = point.Y;
+			this.Z = point.Z;
+			this.EntityCreated();
+		}
+
+		public StiffnessPoint(FemDesign.Supports.SurfaceSupport surface, FemDesign.Geometry.Point3d point, Motions motions, MotionsPlasticLimits MotionsPlasticityLimits = null, string name = null)
+		{
+			this.Initialise(surface, point);
+			this.Rigidity = new RigidityDataType0(motions, MotionsPlasticityLimits);
+			this.Name = name;
+		}
+	}
+}
\ No newline at end of file
diff --git a/FemDesign.Core/Supports/Supports.cs b/FemDesign.Core/Supports/Supports.cs
index c574f43d1..757c01917 100644
--- a/FemDesign.Core/Supports/Supports.cs
+++ b/FemDesign.Core/Supports/Supports.cs
@@ -17,6 +17,8 @@ public partial class Supports
         public List<LineSupport> LineSupport = new List<LineSupport>(); // line_support_type
         [XmlElement("surface_support", Order = 3)] 
         public List<SurfaceSupport> SurfaceSupport = new List<SurfaceSupport>(); // surface_support
+        [XmlElement("stiffness_point", Order = 4)]
+        public List<StiffnessPoint> StiffnessPoint = new List<StiffnessPoint>(); // surface_support
 
         public List<GenericClasses.ISupportElement> GetSupports()
         {
diff --git a/FemDesign.Core/Supports/SurfaceSupport.cs b/FemDesign.Core/Supports/SurfaceSupport.cs
index 56f92d744..28ffedded 100644
--- a/FemDesign.Core/Supports/SurfaceSupport.cs
+++ b/FemDesign.Core/Supports/SurfaceSupport.cs
@@ -8,35 +8,9 @@
 namespace FemDesign.Supports
 {
     [System.Serializable]
-    public partial class SurfaceSupport: EntityBase, IStructureElement, ISupportElement, IStageElement
+    public partial class SurfaceSupport: NamedEntityBase, IStructureElement, ISupportElement, IStageElement
     {
-        [XmlAttribute("name")]
-        public string _name;
-        [XmlIgnore]
-        public string Name
-        {
-            get
-            {
-                return this._name;
-            }
-            set
-            {
-                PointSupport._instance++;
-                this._name = value + "." + PointSupport._instance.ToString();
-            }
-        }
-        public string Identifier => this.Name.Split('.')[0];
-
-
-        [XmlIgnore]
-        public string Instance
-        {
-            get
-            {
-                var found = this._name.IndexOf(".");
-                return this._name.Substring(found + 1);
-            }
-        }
+        protected override int GetUniqueInstanceCount() => ++PointSupport._instance; // PointSupport and SurfaceSupport share the same instance counter.
 
         [XmlAttribute("stage")]
         public int StageId { get; set; } = 1;
@@ -109,7 +83,7 @@ public SurfaceSupport(Geometry.Region region, Motions motions, MotionsPlasticLim
         private void Initialize(Geometry.Region region, RigidityDataType1 rigidity, string identifier)
         {
             this.EntityCreated();
-            this.Name = identifier;
+            this.Identifier = identifier;
             this.Region = region;
             this.Rigidity = rigidity;
             this.CoordinateSystem = region.CoordinateSystem;
diff --git a/FemDesign.Dynamo/Dynamo/AdvancedFem/Cover.cs b/FemDesign.Dynamo/Dynamo/AdvancedFem/Cover.cs
index 3ff26cf40..cd9da3372 100644
--- a/FemDesign.Dynamo/Dynamo/AdvancedFem/Cover.cs
+++ b/FemDesign.Dynamo/Dynamo/AdvancedFem/Cover.cs
@@ -4,7 +4,7 @@
 namespace FemDesign
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class Cover : EntityBase
+    public partial class Cover
     {
         #region dynamo
         
@@ -24,7 +24,7 @@ public static Cover OneWayCover(Autodesk.DesignScript.Geometry.Surface surface,
             Geometry.Region region = Geometry.Region.FromDynamo(surface);
 
             // get loadBearingDirection
-            Geometry.FdVector3d _loadBearingDirection = Geometry.FdVector3d.FromDynamo(loadBearingDirection).Normalize();
+            Geometry.Vector3d _loadBearingDirection = Geometry.Vector3d.FromDynamo(loadBearingDirection).Normalize();
 
             // return
             return Cover.OneWayCover(region, supportingStructures, _loadBearingDirection, identifier);
diff --git a/FemDesign.Dynamo/Dynamo/AuxiliaryResults/LabelledSection.cs b/FemDesign.Dynamo/Dynamo/AuxiliaryResults/LabelledSection.cs
index 5da4002eb..98bf234d8 100644
--- a/FemDesign.Dynamo/Dynamo/AuxiliaryResults/LabelledSection.cs
+++ b/FemDesign.Dynamo/Dynamo/AuxiliaryResults/LabelledSection.cs
@@ -8,7 +8,7 @@
 namespace FemDesign.AuxiliaryResults
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class LabelledSection : EntityBase, IStructureElement
+    public partial class LabelledSection
     {
     }
 }
\ No newline at end of file
diff --git a/FemDesign.Dynamo/Dynamo/Bars/Bar.cs b/FemDesign.Dynamo/Dynamo/Bars/Bar.cs
index 4e7c7c808..a37223adb 100644
--- a/FemDesign.Dynamo/Dynamo/Bars/Bar.cs
+++ b/FemDesign.Dynamo/Dynamo/Bars/Bar.cs
@@ -37,7 +37,7 @@ public static Bar Beam(Autodesk.DesignScript.Geometry.Curve curve, Materials.Mat
             // set local y-axis
             if (!localY.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                bar.BarPart.LocalY = FemDesign.Geometry.FdVector3d.FromDynamo(localY);
+                bar.BarPart.LocalY = FemDesign.Geometry.Vector3d.FromDynamo(localY);
             }
 
             // else orient coordinate system to GCS
@@ -77,7 +77,7 @@ public static Bar Column(Autodesk.DesignScript.Geometry.Line line, Materials.Mat
             // set local y-axis
             if (!localY.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                bar.BarPart.LocalY = FemDesign.Geometry.FdVector3d.FromDynamo(localY);
+                bar.BarPart.LocalY = FemDesign.Geometry.Vector3d.FromDynamo(localY);
             }
 
             // else orient coordinate system to GCS
@@ -114,7 +114,7 @@ public static Bar Truss(Autodesk.DesignScript.Geometry.Line line, Materials.Mate
             // set local y-axis
             if (!localY.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                bar.BarPart.LocalY = FemDesign.Geometry.FdVector3d.FromDynamo(localY);
+                bar.BarPart.LocalY = FemDesign.Geometry.Vector3d.FromDynamo(localY);
             }
 
             // else orient coordinate system to GCS
@@ -151,8 +151,7 @@ public static Bar TrussLimitedCapacity(Autodesk.DesignScript.Geometry.Line line,
             Geometry.Edge edge = Geometry.Edge.FromDynamoLine(line);
 
             // create bar
-            var type = BarType.Truss;
-            Bar bar = new Bar(edge, type, material, section, identifier);
+            Bar bar = Bar.Truss(edge, material, section, identifier);
             bar.MaxCompression = maxCompression;
             bar.MaxTension = maxTension;
             bar.CompressionPlasticity = compressionPlasticity;
@@ -161,7 +160,7 @@ public static Bar TrussLimitedCapacity(Autodesk.DesignScript.Geometry.Line line,
             // set local y-axis
             if (!localY.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                bar.BarPart.LocalY = FemDesign.Geometry.FdVector3d.FromDynamo(localY);
+                bar.BarPart.LocalY = FemDesign.Geometry.Vector3d.FromDynamo(localY);
             }
 
             // else orient coordinate system to GCS
@@ -238,7 +237,7 @@ public static Bar Modify(Bar bar, [DefaultArgument("false")] bool newGuid, [Defa
 
                 if (localY != null)
                 {
-                    bar.BarPart.LocalY = Geometry.FdVector3d.FromDynamo(localY);
+                    bar.BarPart.LocalY = Geometry.Vector3d.FromDynamo(localY);
                 }
 
                 if (orientLCS)
@@ -249,7 +248,6 @@ public static Bar Modify(Bar bar, [DefaultArgument("false")] bool newGuid, [Defa
                 if (identifier != null)
                 {
                     bar.Identifier = identifier;
-                    bar.BarPart.Identifier = bar.Identifier;
                 }
 
                 return bar;
diff --git a/FemDesign.Dynamo/Dynamo/Bars/BarPart.cs b/FemDesign.Dynamo/Dynamo/Bars/BarPart.cs
index ce4e9e52f..0a76af5db 100644
--- a/FemDesign.Dynamo/Dynamo/Bars/BarPart.cs
+++ b/FemDesign.Dynamo/Dynamo/Bars/BarPart.cs
@@ -10,7 +10,7 @@
 namespace FemDesign.Bars
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class BarPart: EntityBase
+    public partial class BarPart: NamedEntityPartBase
     {
         
     }
diff --git a/FemDesign.Dynamo/Dynamo/Bars/ColumnCorbel.cs b/FemDesign.Dynamo/Dynamo/Bars/ColumnCorbel.cs
index c63098588..35d4bd23e 100644
--- a/FemDesign.Dynamo/Dynamo/Bars/ColumnCorbel.cs
+++ b/FemDesign.Dynamo/Dynamo/Bars/ColumnCorbel.cs
@@ -8,7 +8,7 @@
 namespace FemDesign.Bars
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class ColumnCorbel: EntityBase
+    public partial class ColumnCorbel
     {
 
     }
diff --git a/FemDesign.Dynamo/Dynamo/Bars/Connectivity.cs b/FemDesign.Dynamo/Dynamo/Bars/Connectivity.cs
index 3fb59b186..981baa362 100644
--- a/FemDesign.Dynamo/Dynamo/Bars/Connectivity.cs
+++ b/FemDesign.Dynamo/Dynamo/Bars/Connectivity.cs
@@ -9,13 +9,6 @@ namespace FemDesign.Bars
     [IsVisibleInDynamoLibrary(false)]
     public partial class Connectivity
     {
-        /// <summary>
-        /// Define default (rigid) releases for a bar-element.
-        /// </summary>
-        /// <returns></returns>
-        [IsVisibleInDynamoLibrary(false)]
-        public static Connectivity Default() => GetDefault();
-
         /// <summary>
         /// Define releases for a bar-element.
         /// </summary>
@@ -94,18 +87,18 @@ public static Connectivity SemiRigid([DefaultArgument("true")] System.Object mx,
         /// </summary>
         /// <remarks>Create</remarks>
         [IsVisibleInDynamoLibrary(true)]
-        public static Connectivity Hinged()
+        public static Connectivity GetHinged()
         {
-            return GetHinged();
+            return Connectivity.Hinged;
         }
         /// <summary>
         /// Define rigid releases for a bar-element.
         /// </summary>
         /// <remarks>Create</remarks>
         [IsVisibleInDynamoLibrary(true)]
-        public static Connectivity Rigid()
+        public static Connectivity GetRigid()
         {
-            return GetRigid();
+            return Connectivity.Rigid;
         }
     }
 }
\ No newline at end of file
diff --git a/FemDesign.Dynamo/Dynamo/Bars/Eccentricity.cs b/FemDesign.Dynamo/Dynamo/Bars/Eccentricity.cs
index 9290e0904..d59bcd989 100644
--- a/FemDesign.Dynamo/Dynamo/Bars/Eccentricity.cs
+++ b/FemDesign.Dynamo/Dynamo/Bars/Eccentricity.cs
@@ -22,13 +22,5 @@ public static Eccentricity Define(double y = 0, double z = 0)
         {
             return new Eccentricity(y, z);
         }
-
-        /// <summary>
-        /// Create a default eccentricity, i.e. no ecceentricity (y=z=0).
-        /// </summary>
-        /// <remarks>Create</remarks>
-        /// <returns></returns>
-        [IsVisibleInDynamoLibrary(false)]
-        public static Eccentricity Default() => GetDefault();
     }
 }
\ No newline at end of file
diff --git a/FemDesign.Dynamo/Dynamo/Calculate/Application.cs b/FemDesign.Dynamo/Dynamo/Calculate/Application.cs
index 943e38c3b..e3c417365 100644
--- a/FemDesign.Dynamo/Dynamo/Calculate/Application.cs
+++ b/FemDesign.Dynamo/Dynamo/Calculate/Application.cs
@@ -26,7 +26,7 @@ public partial class Application
         /// <returns>Bool. True if session has exited. False if session is still open or was closed manually.</returns>
         [IsVisibleInDynamoLibrary(true)]
         [MultiReturn(new[] { "FdModel", "FdFeaModel", "Results", "HasExited" })]
-        public static Dictionary<string, object> RunAnalysis(Model fdModel, string struxmlPath, Calculate.Analysis analysis, [DefaultArgument("[]")] List<Results.ResultType> resultTypes, [DefaultArgument("[]")] Results.UnitResults units, string docxTemplatePath = "", bool endSession = true, bool closeOpenWindows = false, bool runNode = true)
+        public static Dictionary<string, object> RunAnalysis(Model fdModel, string struxmlPath, Calculate.Analysis analysis, [DefaultArgument("[]")] List<Type> resultTypes, [DefaultArgument("[]")] Results.UnitResults units, string docxTemplatePath = "", bool endSession = true, bool closeOpenWindows = false, bool runNode = true)
         {
             if (!runNode)
             {
@@ -38,12 +38,12 @@ public static Dictionary<string, object> RunAnalysis(Model fdModel, string strux
             units = Results.UnitResults.Default();
             // It needs to check if model has been runned
             // Always Return the FeaNode Result
-            resultTypes.Insert(0, Results.ResultType.FeaNode);
-            resultTypes.Insert(1, Results.ResultType.FeaBar);
-            resultTypes.Insert(1, Results.ResultType.FeaShell);
+            resultTypes.Insert(0, typeof(Results.FeaNode));
+            resultTypes.Insert(1, typeof(Results.FeaBar));
+            resultTypes.Insert(2, typeof(Results.FeaShell));
 
             // Create Bsc files from resultTypes
-            var listProcs = resultTypes.Select(r => Results.ResultAttributeExtentions.ListProcs[r]);
+            //var listProcs = resultTypes.Select(r => Results.ResultAttributeExtentions.ListProcs[r]);
             var bscPathsFromResultTypes = Calculate.Bsc.BscPathFromResultTypes(resultTypes, struxmlPath, units);
             var rtn = fdModel.FdApp.RunAnalysis(struxmlPath, analysis, bscPathsFromResultTypes, docxTemplatePath, endSession, closeOpenWindows);
 
diff --git a/FemDesign.Dynamo/Dynamo/Calculate/LoadCombination.cs b/FemDesign.Dynamo/Dynamo/Calculate/LoadCombination.cs
index 68e3c757b..3e68e5491 100644
--- a/FemDesign.Dynamo/Dynamo/Calculate/LoadCombination.cs
+++ b/FemDesign.Dynamo/Dynamo/Calculate/LoadCombination.cs
@@ -25,7 +25,7 @@ public partial class LoadCombination
         /// <param name="Waterlevel">Ground water level</param>
         /// <returns></returns>
         [IsVisibleInDynamoLibrary(true)]
-        public static Loads.LoadCombination SetupCalculation(Loads.LoadCombination loadCombination, int ImpfRqd = 0, int StabRqd = 0, bool NLE = false, bool PL = false, bool NLS = false, bool Cr = false, bool f2nd = false, bool Im = false, int Waterlevel = 0)
+        public static Loads.LoadCombination SetupCalculation(Loads.LoadCombination loadCombination, int ImpfRqd = 0, int StabRqd = 0, bool NLE = false, bool PL = false, bool NLS = false, bool Cr = false, bool f2nd = false, int Im = 0, int Waterlevel = 0)
         {
             loadCombination.CombItem = new Calculate.CombItem(ImpfRqd, StabRqd, NLE, PL, NLS, Cr, f2nd, Im, Waterlevel);
             return loadCombination;
diff --git a/FemDesign.Dynamo/Dynamo/Calculate/Stage.cs b/FemDesign.Dynamo/Dynamo/Calculate/Stage.cs
index 6a3f4887e..78e0e8528 100644
--- a/FemDesign.Dynamo/Dynamo/Calculate/Stage.cs
+++ b/FemDesign.Dynamo/Dynamo/Calculate/Stage.cs
@@ -1,8 +1,13 @@
 using System;
 using System.Xml.Serialization;
 
+#region dynamo
+using Autodesk.DesignScript.Runtime;
+#endregion
+
 namespace FemDesign.Calculate
 {
+    [IsVisibleInDynamoLibrary(false)]
     public partial class Stage
     {
         
diff --git a/FemDesign.Dynamo/Dynamo/Deconstruct/Deconstruct.cs b/FemDesign.Dynamo/Dynamo/Deconstruct/Deconstruct.cs
index f4090aec9..5896b9c78 100644
--- a/FemDesign.Dynamo/Dynamo/Deconstruct/Deconstruct.cs
+++ b/FemDesign.Dynamo/Dynamo/Deconstruct/Deconstruct.cs
@@ -88,7 +88,7 @@ public static Dictionary<string, object> FictitiousBarDeconstruct(FemDesign.Mode
             return new Dictionary<string, object>
             {
                 {"Guid", fictitiousBar.Guid},
-                {"AnalyticalID", fictitiousBar.Identifier},
+                {"AnalyticalID", fictitiousBar.Name},
                 {"Curve", fictitiousBar.Edge.ToDynamo()},
                 {"AE", fictitiousBar.AE},
                 {"ItG", fictitiousBar.ItG},
@@ -112,7 +112,7 @@ public static Dictionary<string, object> CoverDeconstruct(FemDesign.Cover cover)
             return new Dictionary<string, object>
             {
                 {"Guid", cover.Guid},
-                {"Id", cover.Identifier},
+                {"Id", cover.Name},
                 {"Surface", cover.GetDynamoSurface()},
                 {"Contours", cover.GetDynamoCurves()}
             };
@@ -369,7 +369,7 @@ public static Dictionary<string, object> LoadCaseDeconstruct(FemDesign.Loads.Loa
             return new Dictionary<string, object>
             {
                 {"Guid", loadCase.Guid.ToString()},
-                {"Name", loadCase.Identifier},
+                {"Name", loadCase.Name},
                 {"Type", loadCase.Type.ToString()},
                 {"DurationClass", loadCase.DurationClass.ToString()}
             };
@@ -387,7 +387,7 @@ public static Dictionary<string, object> LoadCombinationDeconstruct(FemDesign.Lo
             return new Dictionary<string, object>
             {
                 {"Guid", loadCombination.Guid},
-                {"Name", loadCombination.Identifier},
+                {"Name", loadCombination.Name},
                 {"Type", loadCombination.Type.ToString()},
                 {"LoadCases", loadCombination.GetLoadCaseGuidsAsString()},
                 {"Gammas", loadCombination.GetGammas()}
@@ -415,7 +415,7 @@ public static Dictionary<string, object> MaterialDeconstruct(FemDesign.Materials
                 {"Guid", material.Guid},
                 {"Standard", standard},
                 {"Country", country},
-                {"Name", material.Identifier}
+                {"Name", material.Name}
             };
         }
 
@@ -538,7 +538,7 @@ public static Dictionary<string, object> StoreyDeconstruct(FemDesign.StructureGr
                 {"Direction", storey.Direction.ToDynamo()},
                 {"DimensionX", storey.DimensionX},
                 {"DimensionY", storey.DimensionY},
-                {"Name", storey.Identifier}
+                {"Name", storey.Name}
             };
         }
 
@@ -599,7 +599,7 @@ public static Dictionary<string, object> FictitiousShellDeconstruct(FemDesign.Mo
             return new Dictionary<string, object>
             {
                 {"Guid", fictitiousShell.Guid},
-                {"AnalyticalId", fictitiousShell.Identifier},
+                {"AnalyticalId", fictitiousShell.Name},
                 {"Surface", fictitiousShell.Region.ToDynamoSurface()},
                 {"MembraneStiffness", fictitiousShell.MembraneStiffness},
                 {"FlexuralStiffness", fictitiousShell.FlexuralStiffness},
@@ -630,7 +630,7 @@ public static Dictionary<string, object> DiaphragmDeconstruct(FemDesign.Modellin
             {
                 {"Guid", diaphragm.Guid},
                 {"Surface", diaphragm.Region.ToDynamoSurface()},
-                {"Identifier", diaphragm.Identifier}
+                {"Identifier", diaphragm.Name}
             };
         }
 
@@ -671,7 +671,7 @@ public static Dictionary<string, object> SectionDeconstruct(FemDesign.Sections.S
             return new Dictionary<string, object>
             {
                 {"Guid", section.Guid},
-                {"Name", section.Identifier},
+                {"Name", section.Name},
                 {"Surfaces", section.RegionGroup.ToDynamo()},
                 {"SectionType", section.Type},
                 {"MaterialType", section.MaterialType},
@@ -710,7 +710,7 @@ public static Dictionary<string, object> EdgeConnectionDeconstruct(FemDesign.She
                     return new Dictionary<string, object>
                     {
                         {"Guid", shellEdgeConnection.Guid},
-                        {"AnalyticalID", shellEdgeConnection.Identifier},
+                        {"AnalyticalID", shellEdgeConnection.Name},
                         {"PredefinedName", null},
                         {"PredefinedGuid", null},
                         {"Friction", null},
@@ -723,7 +723,7 @@ public static Dictionary<string, object> EdgeConnectionDeconstruct(FemDesign.She
                     return new Dictionary<string, object>
                     {
                         {"Guid", shellEdgeConnection.Guid},
-                        {"AnalyticalID", shellEdgeConnection.Identifier},
+                        {"AnalyticalID", shellEdgeConnection.Name},
                         {"PredefinedName", null},
                         {"PredefinedGuid", null},
                         {"Friction", shellEdgeConnection.Rigidity.Friction},
@@ -736,8 +736,8 @@ public static Dictionary<string, object> EdgeConnectionDeconstruct(FemDesign.She
                     return new Dictionary<string, object>
                     {
                         {"Guid", shellEdgeConnection.Guid},
-                        {"AnalyticalID", shellEdgeConnection.Identifier},
-                        {"PredefinedName", shellEdgeConnection.PredefRigidity.Identifier},
+                        {"AnalyticalID", shellEdgeConnection.Name},
+                        {"PredefinedName", shellEdgeConnection.PredefRigidity.Name},
                         {"PredefinedGuid", shellEdgeConnection.PredefRigidity.Guid},
                         {"Friction", null},
                         {"Motions", shellEdgeConnection.PredefRigidity.Rigidity.Motions},
@@ -749,8 +749,8 @@ public static Dictionary<string, object> EdgeConnectionDeconstruct(FemDesign.She
                     return new Dictionary<string, object>
                     {
                         {"Guid", shellEdgeConnection.Guid},
-                        {"AnalyticalID", shellEdgeConnection.Identifier},
-                        {"PredefinedName", shellEdgeConnection.PredefRigidity.Identifier},
+                        {"AnalyticalID", shellEdgeConnection.Name},
+                        {"PredefinedName", shellEdgeConnection.PredefRigidity.Name},
                         {"PredefinedGuid", shellEdgeConnection.PredefRigidity.Guid},
                         {"Friction", shellEdgeConnection.PredefRigidity.Rigidity.Friction},
                         {"Motions", shellEdgeConnection.PredefRigidity.Rigidity.Motions},
diff --git a/FemDesign.Dynamo/Dynamo/GenericClasses/LocationValue.cs b/FemDesign.Dynamo/Dynamo/GenericClasses/LocationValue.cs
index 04c4ef3e4..7d96dc426 100644
--- a/FemDesign.Dynamo/Dynamo/GenericClasses/LocationValue.cs
+++ b/FemDesign.Dynamo/Dynamo/GenericClasses/LocationValue.cs
@@ -7,7 +7,7 @@
 namespace FemDesign
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class LocationValue: Geometry.FdPoint3d
+    public partial class LocationValue: Geometry.Point3d
     {
         
     }
diff --git a/FemDesign.Dynamo/Dynamo/GenericClasses/NamedEntityBase.cs b/FemDesign.Dynamo/Dynamo/GenericClasses/NamedEntityBase.cs
new file mode 100644
index 000000000..a8b16f31a
--- /dev/null
+++ b/FemDesign.Dynamo/Dynamo/GenericClasses/NamedEntityBase.cs
@@ -0,0 +1,20 @@
+using System.Xml.Serialization;
+
+#region dynamo
+using Autodesk.DesignScript.Runtime;
+#endregion
+
+namespace FemDesign
+{
+    [IsVisibleInDynamoLibrary(false)]
+    public partial class NamedEntityBase
+    {
+
+    }
+
+    [IsVisibleInDynamoLibrary(false)]
+    public partial class NamedEntityPartBase
+    {
+
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Dynamo/Dynamo/Geometry/FdCoordinateSystem.cs b/FemDesign.Dynamo/Dynamo/Geometry/CoordinateSystem.cs
similarity index 54%
rename from FemDesign.Dynamo/Dynamo/Geometry/FdCoordinateSystem.cs
rename to FemDesign.Dynamo/Dynamo/Geometry/CoordinateSystem.cs
index adf25dbae..558b4dc2a 100644
--- a/FemDesign.Dynamo/Dynamo/Geometry/FdCoordinateSystem.cs
+++ b/FemDesign.Dynamo/Dynamo/Geometry/CoordinateSystem.cs
@@ -8,20 +8,20 @@
 namespace FemDesign.Geometry
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class FdCoordinateSystem
+    public partial class CoordinateSystem
     {
         #region dynamo
         /// <summary>
         /// Create FdCoordinateSystem from Dynamo coordinate system of a Line or NurbsCurve(?).
         /// This method realignes the coordinate system.
         /// </summary>
-        internal static FdCoordinateSystem FromDynamoCoordinateSystemLine(Autodesk.DesignScript.Geometry.CoordinateSystem obj)
+        internal static CoordinateSystem FromDynamoCoordinateSystemLine(Autodesk.DesignScript.Geometry.CoordinateSystem obj)
         {
-            FdPoint3d origin = FdPoint3d.FromDynamo(obj.Origin);
-            FdVector3d localX = FdVector3d.FromDynamo(obj.YAxis);
-            FdVector3d localY = FdVector3d.FromDynamo(obj.XAxis.Reverse());
-            FdVector3d localZ = localX.Cross(localY).Normalize();
-            return new FdCoordinateSystem(origin, localX, localY, localZ);
+            Point3d origin = Point3d.FromDynamo(obj.Origin);
+            Vector3d localX = Vector3d.FromDynamo(obj.YAxis);
+            Vector3d localY = Vector3d.FromDynamo(obj.XAxis.Reverse());
+            Vector3d localZ = localX.Cross(localY).Normalize();
+            return new CoordinateSystem(origin, localX, localY, localZ);
         }
 
         /// <summary>
@@ -30,32 +30,32 @@ internal static FdCoordinateSystem FromDynamoCoordinateSystemLine(Autodesk.Desig
         /// Dynamo Arcs and Circles follow left-hand rule.
         /// This method realignes the coordinate system.
         /// </summary>
-        internal static FdCoordinateSystem FromDynamoCoordinateSystemArcOrCircle(Autodesk.DesignScript.Geometry.CoordinateSystem obj)
+        internal static CoordinateSystem FromDynamoCoordinateSystemArcOrCircle(Autodesk.DesignScript.Geometry.CoordinateSystem obj)
         {
-            FdPoint3d origin = FdPoint3d.FromDynamo(obj.Origin);
-            FdVector3d localX = FdVector3d.FromDynamo(obj.YAxis);
-            FdVector3d localY = FdVector3d.FromDynamo(obj.XAxis);
-            FdVector3d localZ = localX.Cross(localY).Normalize();
-            return new FdCoordinateSystem(origin, localX, localY, localZ);
+            Point3d origin = Point3d.FromDynamo(obj.Origin);
+            Vector3d localX = Vector3d.FromDynamo(obj.YAxis);
+            Vector3d localY = Vector3d.FromDynamo(obj.XAxis);
+            Vector3d localZ = localX.Cross(localY).Normalize();
+            return new CoordinateSystem(origin, localX, localY, localZ);
         }
 
         /// <summary>
         /// Create FdCoordinateSystem from Dynamo coordinate system of a Surface.
         /// No realignment neccessary.
         /// </summary>
-        internal static FdCoordinateSystem FromDynamoCoordinateSystemSurface(Autodesk.DesignScript.Geometry.CoordinateSystem obj)
+        internal static CoordinateSystem FromDynamoCoordinateSystemSurface(Autodesk.DesignScript.Geometry.CoordinateSystem obj)
         {
-            FdPoint3d origin = FdPoint3d.FromDynamo(obj.Origin);
-            FdVector3d localX = FdVector3d.FromDynamo(obj.XAxis);
-            FdVector3d localY = FdVector3d.FromDynamo(obj.YAxis);
-            FdVector3d localZ = FdVector3d.FromDynamo(obj.ZAxis);
-            return new FdCoordinateSystem(origin, localX, localY, localZ);
+            Point3d origin = Point3d.FromDynamo(obj.Origin);
+            Vector3d localX = Vector3d.FromDynamo(obj.XAxis);
+            Vector3d localY = Vector3d.FromDynamo(obj.YAxis);
+            Vector3d localZ = Vector3d.FromDynamo(obj.ZAxis);
+            return new CoordinateSystem(origin, localX, localY, localZ);
         }
 
         /// <summary>
         /// Create FdCoordinateSystem from Dynamo coordinate system on curve mid u-point.
         /// </summary>
-        internal static FdCoordinateSystem FromDynamoCurve(Autodesk.DesignScript.Geometry.Curve obj)
+        internal static CoordinateSystem FromDynamoCurve(Autodesk.DesignScript.Geometry.Curve obj)
         {
             // CoordinateSystemAtParameter returns a coordinate system on curve
             // with origin at the point at the given parameter.
@@ -67,7 +67,7 @@ internal static FdCoordinateSystem FromDynamoCurve(Autodesk.DesignScript.Geometr
             // Note: Arcs and Circles in Dynamo are defined with left-hand rule while coordinate system is defined by right-hand rule
             if (obj.GetType() == typeof(Autodesk.DesignScript.Geometry.Arc) || obj.GetType() == typeof(Autodesk.DesignScript.Geometry.Circle))
             {
-                return FdCoordinateSystem.FromDynamoCoordinateSystemArcOrCircle(cs);
+                return CoordinateSystem.FromDynamoCoordinateSystemArcOrCircle(cs);
             }
             else
             {
@@ -78,10 +78,10 @@ internal static FdCoordinateSystem FromDynamoCurve(Autodesk.DesignScript.Geometr
         /// <summary>
         /// Create FdCoordinateSystem from Dynamo coordinate system on surface mid u/v-point.
         /// </summary>
-        internal static FdCoordinateSystem FromDynamoSurface(Autodesk.DesignScript.Geometry.Surface obj)
+        internal static CoordinateSystem FromDynamoSurface(Autodesk.DesignScript.Geometry.Surface obj)
         {
             Autodesk.DesignScript.Geometry.CoordinateSystem cs = obj.CoordinateSystemAtParameter(0.5, 0.5);
-            return FdCoordinateSystem.FromDynamoCoordinateSystemSurface(cs);
+            return CoordinateSystem.FromDynamoCoordinateSystemSurface(cs);
         }
         
         #endregion
diff --git a/FemDesign.Dynamo/Dynamo/Geometry/Edge.cs b/FemDesign.Dynamo/Dynamo/Geometry/Edge.cs
index e494bff7a..69cc9e14c 100644
--- a/FemDesign.Dynamo/Dynamo/Geometry/Edge.cs
+++ b/FemDesign.Dynamo/Dynamo/Geometry/Edge.cs
@@ -129,11 +129,11 @@ public static Geometry.Edge FromDynamoArc1(Autodesk.DesignScript.Geometry.Arc ob
             double radius = obj.Radius;
             double startAngle = 0;
             double endAngle = startAngle + Degree.ToRadians(obj.SweepAngle);
-            FdPoint3d centerPoint = FdPoint3d.FromDynamo(obj.CenterPoint);
-            FdVector3d xAxis = new FdVector3d(centerPoint, FdPoint3d.FromDynamo(obj.StartPoint)).Normalize();
+            Point3d centerPoint = Point3d.FromDynamo(obj.CenterPoint);
+            Vector3d xAxis = new Vector3d(centerPoint, Point3d.FromDynamo(obj.StartPoint)).Normalize();
 
             // lcs
-            FdCoordinateSystem cs = FdCoordinateSystem.FromDynamoCurve(obj);
+            CoordinateSystem cs = CoordinateSystem.FromDynamoCurve(obj);
 
             // return
             return new Geometry.Edge(radius, startAngle, endAngle, centerPoint, xAxis, cs);
@@ -145,12 +145,12 @@ public static Geometry.Edge FromDynamoArc1(Autodesk.DesignScript.Geometry.Arc ob
         /// </summary>
         public static Geometry.Edge FromDynamoArc2(Autodesk.DesignScript.Geometry.Arc obj)
         {
-           FdPoint3d p0 = FdPoint3d.FromDynamo(obj.StartPoint);
-           FdPoint3d p1 = FdPoint3d.FromDynamo(obj.PointAtParameter(0.5));
-           FdPoint3d p2 = FdPoint3d.FromDynamo(obj.EndPoint);
+           Point3d p0 = Point3d.FromDynamo(obj.StartPoint);
+           Point3d p1 = Point3d.FromDynamo(obj.PointAtParameter(0.5));
+           Point3d p2 = Point3d.FromDynamo(obj.EndPoint);
 
             // lcs
-            FdCoordinateSystem cs = FdCoordinateSystem.FromDynamoCurve(obj); 
+            CoordinateSystem cs = CoordinateSystem.FromDynamoCurve(obj); 
 
            // return
            return new Geometry.Edge(p0, p1, p2, cs);
@@ -162,10 +162,10 @@ public static Geometry.Edge FromDynamoArc2(Autodesk.DesignScript.Geometry.Arc ob
         public static Geometry.Edge FromDynamoCircle(Autodesk.DesignScript.Geometry.Circle obj)
         {
             double radius = obj.Radius;
-            FdPoint3d centerPoint = FdPoint3d.FromDynamo(obj.CenterPoint);
+            Point3d centerPoint = Point3d.FromDynamo(obj.CenterPoint);
 
             // lcs
-            FdCoordinateSystem cs = FdCoordinateSystem.FromDynamoCurve(obj);
+            CoordinateSystem cs = CoordinateSystem.FromDynamoCurve(obj);
 
             // return
             return new Geometry.Edge(radius, centerPoint, cs);
@@ -176,11 +176,11 @@ public static Geometry.Edge FromDynamoCircle(Autodesk.DesignScript.Geometry.Circ
         /// </summary>
         public static Geometry.Edge FromDynamoLine(Autodesk.DesignScript.Geometry.Line obj)
         {
-            FdPoint3d startPoint = FdPoint3d.FromDynamo(obj.StartPoint);
-            FdPoint3d endPoint = FdPoint3d.FromDynamo(obj.EndPoint);
+            Point3d startPoint = Point3d.FromDynamo(obj.StartPoint);
+            Point3d endPoint = Point3d.FromDynamo(obj.EndPoint);
 
             // lcs
-            FdCoordinateSystem cs = FdCoordinateSystem.FromDynamoCurve(obj);
+            CoordinateSystem cs = CoordinateSystem.FromDynamoCurve(obj);
 
             // return
             return new Geometry.Edge(startPoint, endPoint, cs);
@@ -191,11 +191,11 @@ public static Geometry.Edge FromDynamoLine(Autodesk.DesignScript.Geometry.Line o
         /// </summary>
         public static Geometry.Edge FromDynamoLinearNurbsCurve(Autodesk.DesignScript.Geometry.NurbsCurve obj)
         {
-            FdPoint3d startPoint = FdPoint3d.FromDynamo(obj.StartPoint);
-            FdPoint3d endPoint = FdPoint3d.FromDynamo(obj.EndPoint);
+            Point3d startPoint = Point3d.FromDynamo(obj.StartPoint);
+            Point3d endPoint = Point3d.FromDynamo(obj.EndPoint);
 
             // lcs
-            FdCoordinateSystem cs = FdCoordinateSystem.FromDynamoCurve(obj);
+            CoordinateSystem cs = CoordinateSystem.FromDynamoCurve(obj);
 
             // return
             return new Geometry.Edge(startPoint, endPoint, cs);
diff --git a/FemDesign.Dynamo/Dynamo/Geometry/FdPoint2d.cs b/FemDesign.Dynamo/Dynamo/Geometry/Point2d.cs
similarity index 84%
rename from FemDesign.Dynamo/Dynamo/Geometry/FdPoint2d.cs
rename to FemDesign.Dynamo/Dynamo/Geometry/Point2d.cs
index f01cefa4a..2083fdd84 100644
--- a/FemDesign.Dynamo/Dynamo/Geometry/FdPoint2d.cs
+++ b/FemDesign.Dynamo/Dynamo/Geometry/Point2d.cs
@@ -8,7 +8,7 @@
 namespace FemDesign.Geometry
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class FdPoint2d
+    public partial class Point2d
     {
         
     }
diff --git a/FemDesign.Dynamo/Dynamo/Geometry/FdPoint3d.cs b/FemDesign.Dynamo/Dynamo/Geometry/Point3d.cs
similarity index 76%
rename from FemDesign.Dynamo/Dynamo/Geometry/FdPoint3d.cs
rename to FemDesign.Dynamo/Dynamo/Geometry/Point3d.cs
index 0034c7184..1c1f202ea 100644
--- a/FemDesign.Dynamo/Dynamo/Geometry/FdPoint3d.cs
+++ b/FemDesign.Dynamo/Dynamo/Geometry/Point3d.cs
@@ -9,15 +9,15 @@
 namespace FemDesign.Geometry
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class FdPoint3d
+    public partial class Point3d
     {
         #region dynamo
         /// <summary>
         /// Create FdPoint3d from Dynamo point.
         /// </summary>
-        public static FdPoint3d FromDynamo(Autodesk.DesignScript.Geometry.Point point)
+        public static Point3d FromDynamo(Autodesk.DesignScript.Geometry.Point point)
         {
-            FdPoint3d newPoint = new FdPoint3d(point.X, point.Y, point.Z);
+            Point3d newPoint = new Point3d(point.X, point.Y, point.Z);
             return newPoint;
         }
 
diff --git a/FemDesign.Dynamo/Dynamo/Geometry/Region.cs b/FemDesign.Dynamo/Dynamo/Geometry/Region.cs
index b3e16f70c..016bea823 100644
--- a/FemDesign.Dynamo/Dynamo/Geometry/Region.cs
+++ b/FemDesign.Dynamo/Dynamo/Geometry/Region.cs
@@ -152,7 +152,7 @@ public static Geometry.Region FromDynamo(Autodesk.DesignScript.Geometry.Surface
             }
 
             // get LCS
-            FdCoordinateSystem cs = FdCoordinateSystem.FromDynamoSurface(obj);
+            CoordinateSystem cs = CoordinateSystem.FromDynamoSurface(obj);
 
             // return
             return new Geometry.Region(contours, cs);
diff --git a/FemDesign.Dynamo/Dynamo/Geometry/FdVector2d.cs b/FemDesign.Dynamo/Dynamo/Geometry/Vector2d.cs
similarity index 84%
rename from FemDesign.Dynamo/Dynamo/Geometry/FdVector2d.cs
rename to FemDesign.Dynamo/Dynamo/Geometry/Vector2d.cs
index 1233e4e7c..4437c88b2 100644
--- a/FemDesign.Dynamo/Dynamo/Geometry/FdVector2d.cs
+++ b/FemDesign.Dynamo/Dynamo/Geometry/Vector2d.cs
@@ -8,7 +8,7 @@
 namespace FemDesign.Geometry
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class FdVector2d
+    public partial class Vector2d
     {
         
     }
diff --git a/FemDesign.Dynamo/Dynamo/Geometry/FdVector3d.cs b/FemDesign.Dynamo/Dynamo/Geometry/Vector3d.cs
similarity index 76%
rename from FemDesign.Dynamo/Dynamo/Geometry/FdVector3d.cs
rename to FemDesign.Dynamo/Dynamo/Geometry/Vector3d.cs
index a53951685..889d998be 100644
--- a/FemDesign.Dynamo/Dynamo/Geometry/FdVector3d.cs
+++ b/FemDesign.Dynamo/Dynamo/Geometry/Vector3d.cs
@@ -9,15 +9,15 @@
 namespace FemDesign.Geometry
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class FdVector3d
+    public partial class Vector3d
     {
         #region dynamo
         /// <summary>
         /// Create FdVector3d from Dynamo vector.
         /// </summary>
-        public static FdVector3d FromDynamo(Autodesk.DesignScript.Geometry.Vector vector)
+        public static Vector3d FromDynamo(Autodesk.DesignScript.Geometry.Vector vector)
         {
-            FdVector3d newVector = new FdVector3d(vector.X, vector.Y, vector.Z);
+            Vector3d newVector = new Vector3d(vector.X, vector.Y, vector.Z);
             return newVector;
         }
 
diff --git a/FemDesign.Dynamo/Dynamo/Loads/Footfall.cs b/FemDesign.Dynamo/Dynamo/Loads/Footfall.cs
index 5138d2530..f04abc74a 100644
--- a/FemDesign.Dynamo/Dynamo/Loads/Footfall.cs
+++ b/FemDesign.Dynamo/Dynamo/Loads/Footfall.cs
@@ -19,7 +19,7 @@ public partial class Footfall
         [IsVisibleInDynamoLibrary(true)]
         public static Footfall FullExcitation(Autodesk.DesignScript.Geometry.Point point, string identifier = "FE", string comment = "")
         {
-            var p0 = FdPoint3d.FromDynamo(point);
+            var p0 = Point3d.FromDynamo(point);
             return new Footfall(p0, identifier, comment);
         }
 
diff --git a/FemDesign.Dynamo/Dynamo/Loads/LineLoad.cs b/FemDesign.Dynamo/Dynamo/Loads/LineLoad.cs
index 53229a4d2..e66566c07 100644
--- a/FemDesign.Dynamo/Dynamo/Loads/LineLoad.cs
+++ b/FemDesign.Dynamo/Dynamo/Loads/LineLoad.cs
@@ -24,8 +24,8 @@ public static LineLoad ForceUniform(Autodesk.DesignScript.Geometry.Curve curve,
         {
             // convert geometry
             Geometry.Edge edge = Geometry.Edge.FromDynamoLineOrArc1(curve);
-            Geometry.FdVector3d _startForce = Geometry.FdVector3d.FromDynamo(force);
-            Geometry.FdVector3d _endForce = _startForce;
+            Geometry.Vector3d _startForce = Geometry.Vector3d.FromDynamo(force);
+            Geometry.Vector3d _endForce = _startForce;
 
             // check zero vector
             if (_startForce.IsZero())
@@ -52,8 +52,8 @@ public static LineLoad Force(Autodesk.DesignScript.Geometry.Curve curve, Autodes
         {
             // convert geometry
             Geometry.Edge edge = Geometry.Edge.FromDynamoLineOrArc1(curve);
-            Geometry.FdVector3d _startForce = Geometry.FdVector3d.FromDynamo(startForce);
-            Geometry.FdVector3d _endForce = Geometry.FdVector3d.FromDynamo(endForce);
+            Geometry.Vector3d _startForce = Geometry.Vector3d.FromDynamo(startForce);
+            Geometry.Vector3d _endForce = Geometry.Vector3d.FromDynamo(endForce);
 
             //
             return new LineLoad(edge, _startForce,  _endForce, loadCase, ForceLoadType.Force, comment, constLoadDir, loadProjection: false);
@@ -73,8 +73,8 @@ public static LineLoad MomentUniform(Autodesk.DesignScript.Geometry.Curve curve,
         {
             // convert geometry
             Geometry.Edge edge = Geometry.Edge.FromDynamoLineOrArc1(curve);
-            Geometry.FdVector3d _startForce = Geometry.FdVector3d.FromDynamo(force);
-            Geometry.FdVector3d _endForce = _startForce;
+            Geometry.Vector3d _startForce = Geometry.Vector3d.FromDynamo(force);
+            Geometry.Vector3d _endForce = _startForce;
 
             // check zero vector
             if (_startForce.IsZero())
@@ -100,8 +100,8 @@ public static LineLoad Moment(Autodesk.DesignScript.Geometry.Curve curve, Autode
         {
             // convert geometry
             Geometry.Edge edge = Geometry.Edge.FromDynamoLineOrArc1(curve);
-            Geometry.FdVector3d _startForce = Geometry.FdVector3d.FromDynamo(startForce);
-            Geometry.FdVector3d _endForce = Geometry.FdVector3d.FromDynamo(endForce);
+            Geometry.Vector3d _startForce = Geometry.Vector3d.FromDynamo(startForce);
+            Geometry.Vector3d _endForce = Geometry.Vector3d.FromDynamo(endForce);
 
             return new LineLoad(edge, _startForce, _endForce, loadCase, ForceLoadType.Moment, comment, constLoadDir, loadProjection: false);
         }
diff --git a/FemDesign.Dynamo/Dynamo/Loads/LineStressLoad.cs b/FemDesign.Dynamo/Dynamo/Loads/LineStressLoad.cs
index 465b084de..465dac9c2 100644
--- a/FemDesign.Dynamo/Dynamo/Loads/LineStressLoad.cs
+++ b/FemDesign.Dynamo/Dynamo/Loads/LineStressLoad.cs
@@ -25,7 +25,7 @@ public static LineStressLoad Define(Autodesk.DesignScript.Geometry.Curve curve,
         {
             // convert geometry
             Geometry.Edge edge = Geometry.Edge.FromDynamoLineOrArc1(curve);
-            Geometry.FdVector3d v = Geometry.FdVector3d.FromDynamo(direction);
+            Geometry.Vector3d v = Geometry.Vector3d.FromDynamo(direction);
 
             // return
             return new LineStressLoad(edge, v, topBottomLocationValues, loadCase, comments);
diff --git a/FemDesign.Dynamo/Dynamo/Loads/LineTemperatureLoad.cs b/FemDesign.Dynamo/Dynamo/Loads/LineTemperatureLoad.cs
index 02fc380ef..10756f731 100644
--- a/FemDesign.Dynamo/Dynamo/Loads/LineTemperatureLoad.cs
+++ b/FemDesign.Dynamo/Dynamo/Loads/LineTemperatureLoad.cs
@@ -25,7 +25,7 @@ public static LineTemperatureLoad Define(Autodesk.DesignScript.Geometry.Curve cu
         {
             // convert geometry
             Geometry.Edge edge = Geometry.Edge.FromDynamoLineOrArc1(curve);
-            Geometry.FdVector3d v = Geometry.FdVector3d.FromDynamo(direction);
+            Geometry.Vector3d v = Geometry.Vector3d.FromDynamo(direction);
 
             // return
             return new LineTemperatureLoad(edge, v, topBottomLocationValues, loadCase, comments);
diff --git a/FemDesign.Dynamo/Dynamo/Loads/LoadCase.cs b/FemDesign.Dynamo/Dynamo/Loads/LoadCase.cs
index af2b998a9..49a4f02c3 100644
--- a/FemDesign.Dynamo/Dynamo/Loads/LoadCase.cs
+++ b/FemDesign.Dynamo/Dynamo/Loads/LoadCase.cs
@@ -41,7 +41,7 @@ public static LoadCase GetLoadCaseFromListByName(List<LoadCase> loadCases, strin
         {
             foreach (LoadCase _loadCase in loadCases)
             {
-                if (_loadCase.Identifier == name)
+                if (_loadCase.Name == name)
                 {
                     return _loadCase;
                 }
diff --git a/FemDesign.Dynamo/Dynamo/Loads/LoadLocationValue.cs b/FemDesign.Dynamo/Dynamo/Loads/LoadLocationValue.cs
index efe738fa0..c77cdbae4 100644
--- a/FemDesign.Dynamo/Dynamo/Loads/LoadLocationValue.cs
+++ b/FemDesign.Dynamo/Dynamo/Loads/LoadLocationValue.cs
@@ -18,7 +18,7 @@ public partial class LoadLocationValue: LocationValue
         [IsVisibleInDynamoLibrary(true)]
         public static LoadLocationValue Define(Autodesk.DesignScript.Geometry.Point point, double intensity)
         {
-            return new LoadLocationValue(Geometry.FdPoint3d.FromDynamo(point), intensity);
+            return new LoadLocationValue(Geometry.Point3d.FromDynamo(point), intensity);
         }
 
         #endregion
diff --git a/FemDesign.Dynamo/Dynamo/Loads/PointLoad.cs b/FemDesign.Dynamo/Dynamo/Loads/PointLoad.cs
index c1c4cb1d8..18bba1906 100644
--- a/FemDesign.Dynamo/Dynamo/Loads/PointLoad.cs
+++ b/FemDesign.Dynamo/Dynamo/Loads/PointLoad.cs
@@ -21,8 +21,8 @@ public partial class PointLoad: ForceLoadBase
         [IsVisibleInDynamoLibrary(true)]
         public static PointLoad Force(Autodesk.DesignScript.Geometry.Point point, Autodesk.DesignScript.Geometry.Vector force, LoadCase loadCase, string comment = "")
         {
-            var p0 = Geometry.FdPoint3d.FromDynamo(point);
-            var v0 = Geometry.FdVector3d.FromDynamo(force);
+            var p0 = Geometry.Point3d.FromDynamo(point);
+            var v0 = Geometry.Vector3d.FromDynamo(force);
             PointLoad pointLoad = new PointLoad(p0, v0, loadCase, comment, ForceLoadType.Force);
             return pointLoad;
         }
@@ -37,8 +37,8 @@ public static PointLoad Force(Autodesk.DesignScript.Geometry.Point point, Autode
         [IsVisibleInDynamoLibrary(true)]
         public static PointLoad Moment(Autodesk.DesignScript.Geometry.Point point, Autodesk.DesignScript.Geometry.Vector moment, LoadCase loadCase, string comment = "")
         {
-            var p0 = Geometry.FdPoint3d.FromDynamo(point);
-            var v0 = Geometry.FdVector3d.FromDynamo(moment);
+            var p0 = Geometry.Point3d.FromDynamo(point);
+            var v0 = Geometry.Vector3d.FromDynamo(moment);
             PointLoad pointLoad = new PointLoad(p0, v0, loadCase, comment, ForceLoadType.Moment);
             return pointLoad;
         }
diff --git a/FemDesign.Dynamo/Dynamo/Loads/PressureLoad.cs b/FemDesign.Dynamo/Dynamo/Loads/PressureLoad.cs
index 1f1e48b97..af6229458 100644
--- a/FemDesign.Dynamo/Dynamo/Loads/PressureLoad.cs
+++ b/FemDesign.Dynamo/Dynamo/Loads/PressureLoad.cs
@@ -30,7 +30,7 @@ public static PressureLoad Define(Autodesk.DesignScript.Geometry.Surface surface
             Geometry.Region region = Geometry.Region.FromDynamo(surface);
 
             // normalize direction
-            Geometry.FdVector3d _loadDirection = Geometry.FdVector3d.FromDynamo(direction).Normalize();
+            Geometry.Vector3d _loadDirection = Geometry.Vector3d.FromDynamo(direction).Normalize();
 
             // create SurfaceLoad
             PressureLoad _pressureLoad = new PressureLoad(region, _loadDirection, z0, q0, qh, loadCase, comment, false, ForceLoadType.Force);
diff --git a/FemDesign.Dynamo/Dynamo/Loads/SurfaceLoad.cs b/FemDesign.Dynamo/Dynamo/Loads/SurfaceLoad.cs
index e4fa551cc..dd1d62b7d 100644
--- a/FemDesign.Dynamo/Dynamo/Loads/SurfaceLoad.cs
+++ b/FemDesign.Dynamo/Dynamo/Loads/SurfaceLoad.cs
@@ -21,7 +21,7 @@ public partial class SurfaceLoad: ForceLoadBase
         public static SurfaceLoad Uniform(Autodesk.DesignScript.Geometry.Surface surface, Autodesk.DesignScript.Geometry.Vector force, LoadCase loadCase, string comment = "")
         {
             Geometry.Region region = Geometry.Region.FromDynamo(surface);
-            Geometry.FdVector3d _force = Geometry.FdVector3d.FromDynamo(force);
+            Geometry.Vector3d _force = Geometry.Vector3d.FromDynamo(force);
 
             SurfaceLoad surfaceLoad = SurfaceLoad.Uniform(region, _force, loadCase, false, comment);
 
@@ -48,7 +48,7 @@ public static SurfaceLoad Variable(Autodesk.DesignScript.Geometry.Surface surfac
             }
 
             Geometry.Region region = Geometry.Region.FromDynamo(surface);
-            Geometry.FdVector3d loadDirection = Geometry.FdVector3d.FromDynamo(direction).Normalize();
+            Geometry.Vector3d loadDirection = Geometry.Vector3d.FromDynamo(direction).Normalize();
 
             SurfaceLoad surfaceLoad = SurfaceLoad.Variable(region, loadDirection, loadLocationValue, loadCase, false, comment);
             return surfaceLoad;
diff --git a/FemDesign.Dynamo/Dynamo/Loads/SurfaceTemperatureLoad.cs b/FemDesign.Dynamo/Dynamo/Loads/SurfaceTemperatureLoad.cs
index 14301d5b6..549c66b62 100644
--- a/FemDesign.Dynamo/Dynamo/Loads/SurfaceTemperatureLoad.cs
+++ b/FemDesign.Dynamo/Dynamo/Loads/SurfaceTemperatureLoad.cs
@@ -25,7 +25,7 @@ public static SurfaceTemperatureLoad Define(Autodesk.DesignScript.Geometry.Surfa
         {
             // convert geometry
             Geometry.Region region = Geometry.Region.FromDynamo(surface);
-            Geometry.FdVector3d dir = Geometry.FdVector3d.FromDynamo(direction);
+            Geometry.Vector3d dir = Geometry.Vector3d.FromDynamo(direction);
 
             // return
             return new SurfaceTemperatureLoad(region, dir, tempLocValue, loadCase, comment);
diff --git a/FemDesign.Dynamo/Dynamo/Loads/TopBotLocationValue.cs b/FemDesign.Dynamo/Dynamo/Loads/TopBotLocationValue.cs
index a0aa7aeed..63dbd479c 100644
--- a/FemDesign.Dynamo/Dynamo/Loads/TopBotLocationValue.cs
+++ b/FemDesign.Dynamo/Dynamo/Loads/TopBotLocationValue.cs
@@ -7,7 +7,7 @@
 namespace FemDesign.Loads
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class TopBotLocationValue: Geometry.FdPoint3d
+    public partial class TopBotLocationValue: Geometry.Point3d
     {
         #region dynamo
         /// <summary>
@@ -21,7 +21,7 @@ public partial class TopBotLocationValue: Geometry.FdPoint3d
         public static TopBotLocationValue Define(Autodesk.DesignScript.Geometry.Point point, double topVal, double bottomVal)
         {
             // convert geometry
-            Geometry.FdPoint3d p = Geometry.FdPoint3d.FromDynamo(point); 
+            Geometry.Point3d p = Geometry.Point3d.FromDynamo(point); 
 
             return new TopBotLocationValue(p, topVal, bottomVal);
         }
diff --git a/FemDesign.Dynamo/Dynamo/Model/Model.cs b/FemDesign.Dynamo/Dynamo/Model/Model.cs
index 3ba75d132..5fd7a8fb4 100644
--- a/FemDesign.Dynamo/Dynamo/Model/Model.cs
+++ b/FemDesign.Dynamo/Dynamo/Model/Model.cs
@@ -172,19 +172,36 @@ public static Model ReadStruxml(string filePathStruxml)
         /// <returns></returns>
         [IsVisibleInDynamoLibrary(true)]
         [MultiReturn(new[]{"Model", "FdFeaModel", "Results" })]
-        public static Dictionary<string, object> ReadStr(string strPath, List<Results.ResultType> resultTypes, Results.UnitResults units)
+        public static Dictionary<string, object> ReadStr(string strPath, List<string> resultTypes, Results.UnitResults units)
         {
             Results.FDfea fdFeaModel = null;
 
             // It needs to check if model has been runned
             // Always Return the FeaNode Result
-            resultTypes.Insert(0, Results.ResultType.FeaNode);
-            resultTypes.Insert(1, Results.ResultType.FeaBar);
-            resultTypes.Insert(2, Results.ResultType.FeaShell);
+            resultTypes.Insert(0, "FeaNode");
+            resultTypes.Insert(1, "FeaBar");
+            resultTypes.Insert(2, "FeaShell");
+
+            var notValidResultTypes = new List<string>();
+            var _resultTypes = resultTypes.Select(r =>
+            {
+                var sucess = Results.ResultTypes.All.TryGetValue(r, out Type value);
+                if (sucess)
+                    return value;
+                else
+                {
+                    notValidResultTypes.Add(r);
+                    return null;
+                }
+            });
+            if (notValidResultTypes.Count() != 0)
+            {
+                throw new Exception( "The following strings are not valid result types: " + string.Join(", ", notValidResultTypes));
+            }
 
 
             // Create Bsc files from resultTypes
-            var bscPathsFromResultTypes = Calculate.Bsc.BscPathFromResultTypes(resultTypes, strPath, units);
+            var bscPathsFromResultTypes = Calculate.Bsc.BscPathFromResultTypes(_resultTypes, strPath, units);
 
             // Create FdScript
             var fdScript = FemDesign.Calculate.FdScript.ReadStr(strPath, bscPathsFromResultTypes);
@@ -202,7 +219,7 @@ public static Dictionary<string, object> ReadStr(string strPath, List<Results.Re
             List<Results.FeaBar> feaBarRes = new List<Results.FeaBar>();
             List<Results.FeaShell> feaShellRes = new List<Results.FeaShell>();
 
-            if (resultTypes != null && resultTypes.Any())
+            if (_resultTypes != null && _resultTypes.Any())
             {
                 foreach (var cmd in fdScript.CmdListGen)
                 {
diff --git a/FemDesign.Dynamo/Dynamo/ModellingTools/ConnectedLines.cs b/FemDesign.Dynamo/Dynamo/ModellingTools/ConnectedLines.cs
index 7c506190d..15952dd51 100644
--- a/FemDesign.Dynamo/Dynamo/ModellingTools/ConnectedLines.cs
+++ b/FemDesign.Dynamo/Dynamo/ModellingTools/ConnectedLines.cs
@@ -8,7 +8,7 @@
 namespace FemDesign.ModellingTools
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class ConnectedLines: EntityBase
+    public partial class ConnectedLines
     {
         #region dynamo
         [IsVisibleInDynamoLibrary(true)]
@@ -17,8 +17,8 @@ public static ConnectedLines Define(Autodesk.DesignScript.Geometry.Curve firstCu
             // convert geometry
             Geometry.Edge edge0 = Geometry.Edge.FromDynamoLineOrArc2(firstCurve);
             Geometry.Edge edge1 = Geometry.Edge.FromDynamoLineOrArc2(secondCurve);
-            Geometry.FdVector3d x = Geometry.FdVector3d.FromDynamo(localX);
-            Geometry.FdVector3d y = Geometry.FdVector3d.FromDynamo(localY);
+            Geometry.Vector3d x = Geometry.Vector3d.FromDynamo(localX);
+            Geometry.Vector3d y = Geometry.Vector3d.FromDynamo(localY);
 
             // rigidity
             Releases.RigidityDataType3 rigidity = new Releases.RigidityDataType3(motions, rotations);
diff --git a/FemDesign.Dynamo/Dynamo/ModellingTools/ConnectedPoints.cs b/FemDesign.Dynamo/Dynamo/ModellingTools/ConnectedPoints.cs
index 2ca7f8510..1072b0117 100644
--- a/FemDesign.Dynamo/Dynamo/ModellingTools/ConnectedPoints.cs
+++ b/FemDesign.Dynamo/Dynamo/ModellingTools/ConnectedPoints.cs
@@ -8,7 +8,7 @@
 namespace FemDesign.ModellingTools
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class ConnectedPoints: EntityBase
+    public partial class ConnectedPoints
     {
 
         #region dynamo
@@ -17,8 +17,8 @@ public partial class ConnectedPoints: EntityBase
         public static ConnectedPoints Define(Autodesk.DesignScript.Geometry.Point firstPoint, Autodesk.DesignScript.Geometry.Point secondPoint, Releases.Motions motions, Releases.Rotations rotations, System.Guid[] references, string identifier)
         {
             // convert geometry
-            Geometry.FdPoint3d p1 = Geometry.FdPoint3d.FromDynamo(firstPoint);
-            Geometry.FdPoint3d p2 = Geometry.FdPoint3d.FromDynamo(secondPoint);
+            Geometry.Point3d p1 = Geometry.Point3d.FromDynamo(firstPoint);
+            Geometry.Point3d p2 = Geometry.Point3d.FromDynamo(secondPoint);
 
             // rigidity
             Releases.RigidityDataType2 rigidity = new Releases.RigidityDataType2(motions, rotations);
diff --git a/FemDesign.Dynamo/Dynamo/ModellingTools/Diaphragm.cs b/FemDesign.Dynamo/Dynamo/ModellingTools/Diaphragm.cs
index 84fa3a016..b28ddbf24 100644
--- a/FemDesign.Dynamo/Dynamo/ModellingTools/Diaphragm.cs
+++ b/FemDesign.Dynamo/Dynamo/ModellingTools/Diaphragm.cs
@@ -7,7 +7,7 @@
 namespace FemDesign.ModellingTools
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class Diaphragm : EntityBase
+    public partial class Diaphragm
     {
         [IsVisibleInDynamoLibrary(true)]
         public static Diaphragm Define(Autodesk.DesignScript.Geometry.Surface surface, string identifier = "D")
diff --git a/FemDesign.Dynamo/Dynamo/ModellingTools/FictitiousBar.cs b/FemDesign.Dynamo/Dynamo/ModellingTools/FictitiousBar.cs
index a4459a354..37cb3b27b 100644
--- a/FemDesign.Dynamo/Dynamo/ModellingTools/FictitiousBar.cs
+++ b/FemDesign.Dynamo/Dynamo/ModellingTools/FictitiousBar.cs
@@ -9,7 +9,7 @@
 namespace FemDesign.ModellingTools
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class FictitiousBar: EntityBase
+    public partial class FictitiousBar
     {
         #region dynamo
         [IsVisibleInDynamoLibrary(true)]
@@ -30,7 +30,7 @@ public static FictitiousBar Define(Autodesk.DesignScript.Geometry.Curve curve, [
         {
             // convert geometry
             Geometry.Edge edge = Geometry.Edge.FromDynamoLineOrArc2(curve);
-            Geometry.FdVector3d y = Geometry.FdVector3d.FromDynamo(localY);
+            Geometry.Vector3d y = Geometry.Vector3d.FromDynamo(localY);
 
             // get connectivity
             Bars.Connectivity startConnectivity;
@@ -56,7 +56,7 @@ public static FictitiousBar Define(Autodesk.DesignScript.Geometry.Curve curve, [
             // set local y-axis
             if (!localY.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                bar.LocalY = FemDesign.Geometry.FdVector3d.FromDynamo(localY);
+                bar.LocalY = FemDesign.Geometry.Vector3d.FromDynamo(localY);
             }
 
             // else orient coordinate system to GCS
diff --git a/FemDesign.Dynamo/Dynamo/ModellingTools/FictitiousShell.cs b/FemDesign.Dynamo/Dynamo/ModellingTools/FictitiousShell.cs
index 315db3548..050c2766d 100644
--- a/FemDesign.Dynamo/Dynamo/ModellingTools/FictitiousShell.cs
+++ b/FemDesign.Dynamo/Dynamo/ModellingTools/FictitiousShell.cs
@@ -8,7 +8,7 @@
 namespace FemDesign.ModellingTools
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class FictitiousShell: EntityBase
+    public partial class FictitiousShell
     {
         /// <summary>
         /// Set EdgeConnection by indices.
@@ -47,8 +47,8 @@ public static FictitiousShell Define(Autodesk.DesignScript.Geometry.Surface surf
         {
             // convert geometry
             Geometry.Region region = Geometry.Region.FromDynamo(surface);
-            Geometry.FdVector3d x = Geometry.FdVector3d.FromDynamo(localX);
-            Geometry.FdVector3d z = Geometry.FdVector3d.FromDynamo(localZ);
+            Geometry.Vector3d x = Geometry.Vector3d.FromDynamo(localX);
+            Geometry.Vector3d z = Geometry.Vector3d.FromDynamo(localZ);
 
             // add edge connections to region
             region.SetEdgeConnections(edgeConnection);
@@ -59,13 +59,13 @@ public static FictitiousShell Define(Autodesk.DesignScript.Geometry.Surface surf
             // set local x-axis
             if (!localX.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                obj.LocalX = FemDesign.Geometry.FdVector3d.FromDynamo(localX);
+                obj.LocalX = FemDesign.Geometry.Vector3d.FromDynamo(localX);
             }
 
             // set local z-axis
             if (!localZ.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                obj.LocalZ = FemDesign.Geometry.FdVector3d.FromDynamo(localZ);
+                obj.LocalZ = FemDesign.Geometry.Vector3d.FromDynamo(localZ);
             }
 
             // return
diff --git a/FemDesign.Dynamo/Dynamo/ModellingTools/SurfaceConnection.cs b/FemDesign.Dynamo/Dynamo/ModellingTools/SurfaceConnection.cs
index 6e5d2bd2a..36142b122 100644
--- a/FemDesign.Dynamo/Dynamo/ModellingTools/SurfaceConnection.cs
+++ b/FemDesign.Dynamo/Dynamo/ModellingTools/SurfaceConnection.cs
@@ -8,7 +8,7 @@
 namespace FemDesign.ModellingTools
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class SurfaceConnection: EntityBase
+    public partial class SurfaceConnection
     {
         
     }
diff --git a/FemDesign.Dynamo/Dynamo/Reinforcement/BarReinforcement.cs b/FemDesign.Dynamo/Dynamo/Reinforcement/BarReinforcement.cs
index d6f77fe05..2006d2bc4 100644
--- a/FemDesign.Dynamo/Dynamo/Reinforcement/BarReinforcement.cs
+++ b/FemDesign.Dynamo/Dynamo/Reinforcement/BarReinforcement.cs
@@ -46,7 +46,7 @@ public static Bars.Bar AddToBar(Bars.Bar bar, List<Reinforcement.BarReinforcemen
         public static Reinforcement.BarReinforcement LongitudinalBarByStartEnd(Wire wire, double yPos, double zPos, double startAnchorage, double endAnchorage, double start, double end, bool auxBar)
         {
             // create longitudinal
-            var pos = new FemDesign.Geometry.FdPoint2d(yPos, zPos);
+            var pos = new FemDesign.Geometry.Point2d(yPos, zPos);
             var longBar = new FemDesign.Reinforcement.LongitudinalBar(pos, startAnchorage, endAnchorage, start, end, auxBar);
 
             // create bar reinforcement
diff --git a/FemDesign.Dynamo/Dynamo/Reinforcement/HiddenBar.cs b/FemDesign.Dynamo/Dynamo/Reinforcement/HiddenBar.cs
index 499311c0d..ab090b263 100644
--- a/FemDesign.Dynamo/Dynamo/Reinforcement/HiddenBar.cs
+++ b/FemDesign.Dynamo/Dynamo/Reinforcement/HiddenBar.cs
@@ -8,7 +8,7 @@
 namespace FemDesign.Reinforcement
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class HiddenBar: EntityBase
+    public partial class HiddenBar
     {
         
     }
diff --git a/FemDesign.Dynamo/Dynamo/Results/BarDisplacement.cs b/FemDesign.Dynamo/Dynamo/Results/BarDisplacement.cs
index 73013e871..b2ee1561c 100644
--- a/FemDesign.Dynamo/Dynamo/Results/BarDisplacement.cs
+++ b/FemDesign.Dynamo/Dynamo/Results/BarDisplacement.cs
@@ -12,6 +12,12 @@ namespace FemDesign.Results
     [IsVisibleInDynamoLibrary(false)]
     public partial class BarDisplacement : IResult
     {
+        [IsVisibleInDynamoLibrary(true)]
+        public static string ResultType()
+        {
+            return "BarDisplacement";
+        }
+
         /// <summary>
         /// Deconstruct the Bar Displacement Results
         /// </summary>
@@ -37,8 +43,8 @@ public static Dictionary<string, object> Deconstruct(List<FemDesign.Results.BarD
             var loadCases = (List<string>)result["CaseIdentifier"];
             var elementId = (List<string>)result["ElementId"];
             var positionResult = (List<double>)result["PositionResult"];
-            var iTranslation = (List<FemDesign.Geometry.FdVector3d>)result["Translation"];
-            var iRotation = (List<FemDesign.Geometry.FdVector3d>)result["Rotation"];
+            var iTranslation = (List<FemDesign.Geometry.Vector3d>)result["Translation"];
+            var iRotation = (List<FemDesign.Geometry.Vector3d>)result["Rotation"];
 
             // Convert the FdVector to Dynamo
             var oTranslation = iTranslation.Select(x => x.ToDynamo());
diff --git a/FemDesign.Dynamo/Dynamo/Results/BarInternalForce.cs b/FemDesign.Dynamo/Dynamo/Results/BarInternalForce.cs
index addcfa004..4bb4a33f0 100644
--- a/FemDesign.Dynamo/Dynamo/Results/BarInternalForce.cs
+++ b/FemDesign.Dynamo/Dynamo/Results/BarInternalForce.cs
@@ -11,6 +11,13 @@ namespace FemDesign.Results
     [IsVisibleInDynamoLibrary(false)]
     public partial class BarInternalForce : IResult
     {
+
+        [IsVisibleInDynamoLibrary(true)]
+        public static string ResultType()
+        {
+            return "BarInternalForce";
+        }
+
         /// <summary>
         /// Create new model. Add entities to model. Nested lists are not supported, use flatten.
         /// </summary>
diff --git a/FemDesign.Dynamo/Dynamo/Results/BarStress.cs b/FemDesign.Dynamo/Dynamo/Results/BarStress.cs
index 651ed055d..7fa9f0f11 100644
--- a/FemDesign.Dynamo/Dynamo/Results/BarStress.cs
+++ b/FemDesign.Dynamo/Dynamo/Results/BarStress.cs
@@ -11,6 +11,13 @@ namespace FemDesign.Results
     [IsVisibleInDynamoLibrary(false)]
     public partial class BarStress : IResult
     {
+
+        [IsVisibleInDynamoLibrary(true)]
+        public static string ResultType()
+        {
+            return "BarStress";
+        }
+
         /// <summary>
         /// Read Bar Stress from a previously run model.
         /// </summary>
diff --git a/FemDesign.Dynamo/Dynamo/Results/EigenFrequencies.cs b/FemDesign.Dynamo/Dynamo/Results/EigenFrequencies.cs
index 7a85adf98..9552b9856 100644
--- a/FemDesign.Dynamo/Dynamo/Results/EigenFrequencies.cs
+++ b/FemDesign.Dynamo/Dynamo/Results/EigenFrequencies.cs
@@ -12,6 +12,12 @@ namespace FemDesign.Results
     [IsVisibleInDynamoLibrary(false)]
     public partial class EigenFrequencies : IResult
     {
+        [IsVisibleInDynamoLibrary(true)]
+        public static string ResultType()
+        {
+            return "EigenFrequencies";
+        }
+
         /// <summary>
         /// Read the EigenFrequencies for the entire model
         /// </summary>
diff --git a/FemDesign.Dynamo/Dynamo/Results/FeaNode.cs b/FemDesign.Dynamo/Dynamo/Results/FeaNode.cs
index c72e77b29..5615664ff 100644
--- a/FemDesign.Dynamo/Dynamo/Results/FeaNode.cs
+++ b/FemDesign.Dynamo/Dynamo/Results/FeaNode.cs
@@ -12,6 +12,12 @@ namespace FemDesign.Results
     [IsVisibleInDynamoLibrary(false)]
     public partial class FeaNode : IResult
     {
+        [IsVisibleInDynamoLibrary(true)]
+        public static string ResultType()
+        {
+            return "FeaNode";
+        }
+
         /// <summary>
         /// Deconstruct the Fea Node Element
         /// </summary>
@@ -25,7 +31,7 @@ public static Dictionary<string, object> Deconstruct(FDfea FdFeaModel)
 
 
             var nodeId = (List<int>)result["NodeId"];
-            var feaNodePoint = (List<FemDesign.Geometry.FdPoint3d>)result["Position"];
+            var feaNodePoint = (List<FemDesign.Geometry.Point3d>)result["Position"];
 
 
             // Convert the FdPoint to Rhino
diff --git a/FemDesign.Dynamo/Dynamo/Results/LineSupportReaction.cs b/FemDesign.Dynamo/Dynamo/Results/LineSupportReaction.cs
index 7db9b0317..0765846b6 100644
--- a/FemDesign.Dynamo/Dynamo/Results/LineSupportReaction.cs
+++ b/FemDesign.Dynamo/Dynamo/Results/LineSupportReaction.cs
@@ -12,6 +12,12 @@ namespace FemDesign.Results
     [IsVisibleInDynamoLibrary(false)]
     public partial class LineSupportReaction : IResult
     {
+        [IsVisibleInDynamoLibrary(true)]
+        public static string ResultType()
+        {
+            return "LineSupportReaction";
+        }
+
         /// <summary>
         /// 
         /// </summary>
@@ -37,8 +43,8 @@ public static Dictionary<string, object> Deconstruct(List<FemDesign.Results.Line
             var identifier = (List<string>)result["Identifier"];
             var elementId = (List<int>)result["ElementId"];
             var nodeId = (List<int>)result["NodeId"];
-            var iReactionForce = (List<FemDesign.Geometry.FdVector3d>)result["ReactionForce"];
-            var iReactionMoment = (List<FemDesign.Geometry.FdVector3d>)result["ReactionMoment"];
+            var iReactionForce = (List<FemDesign.Geometry.Vector3d>)result["ReactionForce"];
+            var iReactionMoment = (List<FemDesign.Geometry.Vector3d>)result["ReactionMoment"];
             var iForceResultant = (List<double>)result["ForceResultant"];
             var iMomentResultant = (List<double>)result["MomentResultant"];
 
diff --git a/FemDesign.Dynamo/Dynamo/Results/NodalDisplacement.cs b/FemDesign.Dynamo/Dynamo/Results/NodalDisplacement.cs
index 6b181b357..8571e1ba4 100644
--- a/FemDesign.Dynamo/Dynamo/Results/NodalDisplacement.cs
+++ b/FemDesign.Dynamo/Dynamo/Results/NodalDisplacement.cs
@@ -12,6 +12,12 @@ namespace FemDesign.Results
     [IsVisibleInDynamoLibrary(false)]
     public partial class NodalDisplacement : IResult
     {
+        [IsVisibleInDynamoLibrary(true)]
+        public static string ResultType()
+        {
+            return "NodalDisplacement";
+        }
+
         /// <summary>
         /// Create new model. Add entities to model. Nested lists are not supported, use flatten.
         /// </summary>
@@ -35,8 +41,8 @@ public static Dictionary<string, object> Deconstruct(List<FemDesign.Results.Noda
 
             var loadCases = (List<string>)result["CaseIdentifier"];
             var nodeId = (List<int>)result["NodeId"];
-            var iTranslation = (List<FemDesign.Geometry.FdVector3d>)result["Translation"];
-            var iRotation = (List<FemDesign.Geometry.FdVector3d>)result["Rotation"];
+            var iTranslation = (List<FemDesign.Geometry.Vector3d>)result["Translation"];
+            var iRotation = (List<FemDesign.Geometry.Vector3d>)result["Rotation"];
 
 
             // Convert the FdVector to Dynamo
diff --git a/FemDesign.Dynamo/Dynamo/Results/NodalVibration.cs b/FemDesign.Dynamo/Dynamo/Results/NodalVibration.cs
index 6cccfa939..52701ed38 100644
--- a/FemDesign.Dynamo/Dynamo/Results/NodalVibration.cs
+++ b/FemDesign.Dynamo/Dynamo/Results/NodalVibration.cs
@@ -12,6 +12,12 @@ namespace FemDesign.Results
     [IsVisibleInDynamoLibrary(false)]
     public partial class NodalVibration : IResult
     {
+        [IsVisibleInDynamoLibrary(true)]
+        public static string ResultType()
+        {
+            return "NodalVibration";
+        }
+
         /// <summary>
         /// Read the Modal Shape vectors for the entire model
         /// </summary>
@@ -36,8 +42,8 @@ public static Dictionary<string, object> Deconstruct(List<FemDesign.Results.Noda
             var shapeIds = (List<int>)result["ShapeId"];
             var identifier = (List<string>)result["Id"];
             var nodeId = (List<int>)result["NodeId"];
-            var iTranslation = (List<FemDesign.Geometry.FdVector3d>)result["Translation"];
-            var iRotation = (List<FemDesign.Geometry.FdVector3d>)result["Rotation"];
+            var iTranslation = (List<FemDesign.Geometry.Vector3d>)result["Translation"];
+            var iRotation = (List<FemDesign.Geometry.Vector3d>)result["Rotation"];
 
             // Convert the FdVector to Dynamo
             var oTranslation = iTranslation.Select(x => x.ToDynamo());
diff --git a/FemDesign.Dynamo/Dynamo/Results/PointSupportReaction.cs b/FemDesign.Dynamo/Dynamo/Results/PointSupportReaction.cs
index 6a59db7dd..cd209a160 100644
--- a/FemDesign.Dynamo/Dynamo/Results/PointSupportReaction.cs
+++ b/FemDesign.Dynamo/Dynamo/Results/PointSupportReaction.cs
@@ -12,6 +12,12 @@ namespace FemDesign.Results
     [IsVisibleInDynamoLibrary(false)]
     public partial class PointSupportReaction : IResult
     {
+        [IsVisibleInDynamoLibrary(true)]
+        public static string ResultType()
+        {
+            return "PointSupportReaction";
+        }
+
         /// <summary>
         /// 
         /// </summary>
@@ -35,9 +41,9 @@ public static Dictionary<string, object> Deconstruct(List<FemDesign.Results.Poin
             var loadCases = (List<string>)result["CaseIdentifier"];
             var identifier = (List<string>)result["Identifier"];
             var nodeId = (List<int>)result["NodeId"];
-            var iPos = (List<FemDesign.Geometry.FdPoint3d>)result["Position"];
-            var iReactionForce = (List<FemDesign.Geometry.FdVector3d>)result["ReactionForce"];
-            var iReactionMoment = (List<FemDesign.Geometry.FdVector3d>)result["ReactionMoment"];
+            var iPos = (List<FemDesign.Geometry.Point3d>)result["Position"];
+            var iReactionForce = (List<FemDesign.Geometry.Vector3d>)result["ReactionForce"];
+            var iReactionMoment = (List<FemDesign.Geometry.Vector3d>)result["ReactionMoment"];
             var iForceResultant = (List<double>)result["ForceResultant"];
             var iMomentResultant = (List<double>)result["MomentResultant"];
 
diff --git a/FemDesign.Dynamo/Dynamo/Results/PointSupportReactionMinMax.cs b/FemDesign.Dynamo/Dynamo/Results/PointSupportReactionMinMax.cs
new file mode 100644
index 000000000..d045dd57b
--- /dev/null
+++ b/FemDesign.Dynamo/Dynamo/Results/PointSupportReactionMinMax.cs
@@ -0,0 +1,72 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+#region dynamo
+using Autodesk.DesignScript.Runtime;
+using Autodesk.DesignScript.Geometry;
+#endregion
+
+namespace FemDesign.Results
+{
+    [IsVisibleInDynamoLibrary(false)]
+    public partial class PointSupportReactionMinMax : IResult
+    {
+
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <param name="Result">Result to be Parse</param>
+        /// <param name="CaseCombName">Name of Load Case/Load Combination for which to return the results. Default value returns the results for the first load case</param>
+        [IsVisibleInDynamoLibrary(true)]
+        [MultiReturn(new[] { "MinMax", "CaseIdentifier", "Identifier", "NodeId", "SupportPosition", "ReactionForce", "ReactionMoment", "ForceResultant", "MomentResultant" })]
+        public static Dictionary<string, object> Deconstruct(List<FemDesign.Results.PointSupportReactionMinMax> Result)
+        {
+            
+            List<string> minMax = new List<string>();
+            List<string> loadCases = new List<string>();
+            List<string> identifier = new List<string>();
+            List<int> nodeId = new List<int>();
+            List<Point> pos = new List<Point>();
+            List<Vector> reactionForce = new List<Vector>();
+            List<Vector> reactionMoment = new List<Vector>();
+            List<double> forceResultant = new List<double>();
+            List<double> momentResultant = new List<double>();
+
+            foreach (var item in Result)
+            {
+                minMax.Add(item.Max);
+                loadCases.Add(item.CaseIdentifier);
+                identifier.Add(item.Id);
+                nodeId.Add(item.NodeId);
+                pos.Add(Autodesk.DesignScript.Geometry.Point.ByCoordinates(item.X, item.Y, item.Z));
+                reactionForce.Add(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(item.Fx, item.Fy, item.Fz));
+                reactionMoment.Add(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(item.Mx, item.My, item.Mz));
+                forceResultant.Add(item.Fr);
+                momentResultant.Add(item.Mr);
+            }
+
+            return new Dictionary<string, dynamic>
+            {
+                {"MinMax", minMax },
+                {"CaseIdentifier", loadCases},
+                {"Identifier", identifier},
+                {"NodeId", nodeId},
+                {"SupportPosition", pos},
+                {"ReactionForce", reactionForce},
+                {"ReactionMoment", reactionMoment},
+                {"ForceResultant", forceResultant},
+                {"MomentResultant", momentResultant}
+            };
+        }
+
+
+        [IsVisibleInDynamoLibrary(true)]
+        public static string ResultType()
+        {
+            return "PointSupportReactionMinMax";
+        }
+    }
+}
diff --git a/FemDesign.Dynamo/Dynamo/Results/ShellDisplacement.cs b/FemDesign.Dynamo/Dynamo/Results/ShellDisplacement.cs
index 6826c8a27..eb2cdff24 100644
--- a/FemDesign.Dynamo/Dynamo/Results/ShellDisplacement.cs
+++ b/FemDesign.Dynamo/Dynamo/Results/ShellDisplacement.cs
@@ -12,6 +12,12 @@ namespace FemDesign.Results
     [IsVisibleInDynamoLibrary(false)]
     public partial class ShellDisplacement : IResult
     {
+        [IsVisibleInDynamoLibrary(true)]
+        public static string ResultType()
+        {
+            return "ShellDisplacement";
+        }
+
         /// <summary>
         /// Deconstruct the Shell Displacement Results
         /// </summary>
@@ -37,8 +43,8 @@ public static Dictionary<string, object> Deconstruct(List<FemDesign.Results.Shel
             var loadCases = (List<string>)result["CaseIdentifier"];
             var elementId = (List<int>)result["ElementId"];
             var nodeId = (List<int?>)result["NodeId"];
-            var iTranslation = (List<FemDesign.Geometry.FdVector3d>)result["Translation"];
-            var iRotation = (List<FemDesign.Geometry.FdVector3d>)result["Rotation"];
+            var iTranslation = (List<FemDesign.Geometry.Vector3d>)result["Translation"];
+            var iRotation = (List<FemDesign.Geometry.Vector3d>)result["Rotation"];
 
             // Convert the FdVector to Dynamo
             var oTranslation = iTranslation.Select(x => x.ToDynamo());
diff --git a/FemDesign.Dynamo/Dynamo/Results/ShellInternalForce.cs b/FemDesign.Dynamo/Dynamo/Results/ShellInternalForce.cs
index 668acdc4f..e48b79e1c 100644
--- a/FemDesign.Dynamo/Dynamo/Results/ShellInternalForce.cs
+++ b/FemDesign.Dynamo/Dynamo/Results/ShellInternalForce.cs
@@ -14,6 +14,13 @@ namespace FemDesign.Results
     [IsVisibleInDynamoLibrary(false)]
     public partial class ShellInternalForce : IResult
     {
+        [IsVisibleInDynamoLibrary(true)]
+        public static string ResultType()
+        {
+            return "ShellInternalForce";
+        }
+
+
         /// <summary>
         /// Deconstruct the Shell Internal Force Results
         /// </summary>
diff --git a/FemDesign.Dynamo/Dynamo/Shells/EdgeConnection.cs b/FemDesign.Dynamo/Dynamo/Shells/EdgeConnection.cs
index b3aa19d5c..1061ba982 100644
--- a/FemDesign.Dynamo/Dynamo/Shells/EdgeConnection.cs
+++ b/FemDesign.Dynamo/Dynamo/Shells/EdgeConnection.cs
@@ -11,13 +11,6 @@ namespace FemDesign.Shells
     [IsVisibleInDynamoLibrary(false)]
     public partial class EdgeConnection: EdgeConnectionBase
     {
-        /// <summary>
-        /// Create a default (rigid) EdgeConnection.
-        /// </summary>
-        /// <returns></returns>
-        [IsVisibleInDynamoLibrary(false)]
-        public static EdgeConnection Default() => GetDefault();
-
         /// <summary>
         /// Define a new EdgeConnection
         /// </summary>
@@ -37,9 +30,9 @@ public static EdgeConnection Define(Releases.Motions motions, Releases.Rotations
         /// <remarks>Create</remarks>
         /// <returns></returns>
         [IsVisibleInDynamoLibrary(true)]
-        public static EdgeConnection Hinged()
+        public static EdgeConnection GetHinged()
         {
-            return EdgeConnection.GetHinged();
+            return EdgeConnection.Hinged;
         }
 
         /// <summary>
@@ -48,9 +41,9 @@ public static EdgeConnection Hinged()
         /// <remarks>Create</remarks>
         /// <returns></returns>
         [IsVisibleInDynamoLibrary(true)]
-        public static EdgeConnection Rigid()
+        public static EdgeConnection GetRigid()
         {
-            return EdgeConnection.GetRigid();
+            return EdgeConnection.Rigid;
         }
     }
 }
\ No newline at end of file
diff --git a/FemDesign.Dynamo/Dynamo/Shells/Panel.cs b/FemDesign.Dynamo/Dynamo/Shells/Panel.cs
index 0eda6a02c..b13e2006f 100644
--- a/FemDesign.Dynamo/Dynamo/Shells/Panel.cs
+++ b/FemDesign.Dynamo/Dynamo/Shells/Panel.cs
@@ -10,7 +10,7 @@
 namespace FemDesign.Shells
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class Panel: EntityBase
+    public partial class Panel
     {
         #region dynamo
 
@@ -40,13 +40,13 @@ public static Panel ProfiledPlate(Autodesk.DesignScript.Geometry.Surface surface
             // set local x-axis
             if (!localX.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                obj.LocalX = FemDesign.Geometry.FdVector3d.FromDynamo(localX);
+                obj.LocalX = FemDesign.Geometry.Vector3d.FromDynamo(localX);
             }
 
             // set local z-axis
             if (!localZ.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                obj.LocalZ = FemDesign.Geometry.FdVector3d.FromDynamo(localZ);
+                obj.LocalZ = FemDesign.Geometry.Vector3d.FromDynamo(localZ);
             }
 
             // set mesh
diff --git a/FemDesign.Dynamo/Dynamo/Shells/ShellEccentricity.cs b/FemDesign.Dynamo/Dynamo/Shells/ShellEccentricity.cs
index 1539096c6..a97fa5195 100644
--- a/FemDesign.Dynamo/Dynamo/Shells/ShellEccentricity.cs
+++ b/FemDesign.Dynamo/Dynamo/Shells/ShellEccentricity.cs
@@ -20,13 +20,5 @@ public static ShellEccentricity Create(VerticalAlignment alignment, double eccen
         {
             return new ShellEccentricity(alignment, eccentricity, eccentricityCalculation, eccentricityByCracking);
         }
-
-        /// <summary>
-        /// Create a default ShellEccentricity.
-        /// </summary>
-        /// <remarks>Create</remarks>
-        /// <returns></returns>
-        [IsVisibleInDynamoLibrary(false)]
-        public static ShellEccentricity Default() => GetDefault();
     }
 }
\ No newline at end of file
diff --git a/FemDesign.Dynamo/Dynamo/Shells/ShellOrthotropy.cs b/FemDesign.Dynamo/Dynamo/Shells/ShellOrthotropy.cs
index d4d433abb..ef889b97d 100644
--- a/FemDesign.Dynamo/Dynamo/Shells/ShellOrthotropy.cs
+++ b/FemDesign.Dynamo/Dynamo/Shells/ShellOrthotropy.cs
@@ -20,13 +20,5 @@ public static ShellOrthotropy Create(double orthoAlfa = 0, double orthoRatio = 1
         {
             return new ShellOrthotropy(orthoAlfa, orthoRatio);
         }
-
-        /// <summary>
-        /// Create a default definition for ShellOrthotropy.
-        /// </summary>
-        /// <remarks>Create</remarks>
-        /// <returns></returns>
-        [IsVisibleInDynamoLibrary(false)]
-        public static ShellOrthotropy Default() => GetDefault();
     }
 }
\ No newline at end of file
diff --git a/FemDesign.Dynamo/Dynamo/Shells/Slab.cs b/FemDesign.Dynamo/Dynamo/Shells/Slab.cs
index d47140e8f..33cf8e228 100644
--- a/FemDesign.Dynamo/Dynamo/Shells/Slab.cs
+++ b/FemDesign.Dynamo/Dynamo/Shells/Slab.cs
@@ -9,7 +9,7 @@
 namespace FemDesign.Shells
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class Slab: EntityBase
+    public partial class Slab
     {
         #region dynamo
 
@@ -66,13 +66,13 @@ public static Slab Plate(Autodesk.DesignScript.Geometry.Surface surface, double
             // set local x-axis
             if (!localX.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                slab.SlabPart.LocalX = FemDesign.Geometry.FdVector3d.FromDynamo(localX);
+                slab.SlabPart.LocalX = FemDesign.Geometry.Vector3d.FromDynamo(localX);
             }
 
             // set local z-axis
             if (!localZ.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                slab.SlabPart.LocalZ = FemDesign.Geometry.FdVector3d.FromDynamo(localZ);
+                slab.SlabPart.LocalZ = FemDesign.Geometry.Vector3d.FromDynamo(localZ);
             }
 
             return slab;
@@ -109,13 +109,13 @@ public static Slab PlateVariableThickness(Autodesk.DesignScript.Geometry.Surface
             // set local x-axis
             if (!localX.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                slab.SlabPart.LocalX = FemDesign.Geometry.FdVector3d.FromDynamo(localX);
+                slab.SlabPart.LocalX = FemDesign.Geometry.Vector3d.FromDynamo(localX);
             }
 
             // set local z-axis
             if (!localZ.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                slab.SlabPart.LocalZ = FemDesign.Geometry.FdVector3d.FromDynamo(localZ);
+                slab.SlabPart.LocalZ = FemDesign.Geometry.Vector3d.FromDynamo(localZ);
             }
 
             return slab;
@@ -156,13 +156,13 @@ public static Slab Wall(Autodesk.DesignScript.Geometry.Surface surface, double t
             // set local x-axis
             if (!localX.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                slab.SlabPart.LocalX = FemDesign.Geometry.FdVector3d.FromDynamo(localX);
+                slab.SlabPart.LocalX = FemDesign.Geometry.Vector3d.FromDynamo(localX);
             }
 
             // set local z-axis
             if (!localZ.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                slab.SlabPart.LocalZ = FemDesign.Geometry.FdVector3d.FromDynamo(localZ);
+                slab.SlabPart.LocalZ = FemDesign.Geometry.Vector3d.FromDynamo(localZ);
             }
 
             return slab;
@@ -205,13 +205,13 @@ public static Slab WallVariableThickness(Autodesk.DesignScript.Geometry.Surface
             // set local x-axis
             if (!localX.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                slab.SlabPart.LocalX = FemDesign.Geometry.FdVector3d.FromDynamo(localX);
+                slab.SlabPart.LocalX = FemDesign.Geometry.Vector3d.FromDynamo(localX);
             }
 
             // set local z-axis
             if (!localZ.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                slab.SlabPart.LocalZ = FemDesign.Geometry.FdVector3d.FromDynamo(localZ);
+                slab.SlabPart.LocalZ = FemDesign.Geometry.Vector3d.FromDynamo(localZ);
             }
 
             return slab;
@@ -230,8 +230,8 @@ public Slab SetLocalAxes(Autodesk.DesignScript.Geometry.Vector localX, Autodesk.
             Slab slab = this.DeepClone();
 
             // set local x and local z
-            slab.SlabPart.LocalX = Geometry.FdVector3d.FromDynamo(localX);
-            slab.SlabPart.LocalZ = Geometry.FdVector3d.FromDynamo(localZ);
+            slab.SlabPart.LocalX = Geometry.Vector3d.FromDynamo(localX);
+            slab.SlabPart.LocalZ = Geometry.Vector3d.FromDynamo(localZ);
 
             //
             return slab;
diff --git a/FemDesign.Dynamo/Dynamo/Shells/SlabPart.cs b/FemDesign.Dynamo/Dynamo/Shells/SlabPart.cs
index 159c8bbf9..0813fa5c5 100644
--- a/FemDesign.Dynamo/Dynamo/Shells/SlabPart.cs
+++ b/FemDesign.Dynamo/Dynamo/Shells/SlabPart.cs
@@ -10,7 +10,7 @@
 namespace FemDesign.Shells
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class SlabPart: EntityBase
+    public partial class SlabPart
     { 
         #region dynamo
 
diff --git a/FemDesign.Dynamo/Dynamo/Shells/Thickness.cs b/FemDesign.Dynamo/Dynamo/Shells/Thickness.cs
index c1fba3be2..21bc1088e 100644
--- a/FemDesign.Dynamo/Dynamo/Shells/Thickness.cs
+++ b/FemDesign.Dynamo/Dynamo/Shells/Thickness.cs
@@ -19,7 +19,7 @@ public partial class Thickness: LocationValue
         [IsVisibleInDynamoLibrary(true)]
         public static Thickness Define(Autodesk.DesignScript.Geometry.Point point, double val)
         {
-            return new Thickness(Geometry.FdPoint3d.FromDynamo(point), val);
+            return new Thickness(Geometry.Point3d.FromDynamo(point), val);
         }
         
         #endregion
diff --git a/FemDesign.Dynamo/Dynamo/Stage/ActivatedLoadCase.cs b/FemDesign.Dynamo/Dynamo/Stage/ActivatedLoadCase.cs
new file mode 100644
index 000000000..eb8871802
--- /dev/null
+++ b/FemDesign.Dynamo/Dynamo/Stage/ActivatedLoadCase.cs
@@ -0,0 +1,21 @@
+using System;
+using System.Xml.Serialization;
+using System.Globalization;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+using FemDesign.GenericClasses;
+
+#region dynamo
+using Autodesk.DesignScript.Runtime;
+#endregion
+
+namespace FemDesign
+{
+    [IsVisibleInDynamoLibrary(false)]
+    public partial class ActivatedLoadCase
+    {
+
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Dynamo/Dynamo/Stage/ConstructionStages.cs b/FemDesign.Dynamo/Dynamo/Stage/ConstructionStages.cs
new file mode 100644
index 000000000..9157dabc8
--- /dev/null
+++ b/FemDesign.Dynamo/Dynamo/Stage/ConstructionStages.cs
@@ -0,0 +1,21 @@
+using System;
+using System.Xml.Serialization;
+using System.Globalization;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+using FemDesign.GenericClasses;
+
+#region dynamo
+using Autodesk.DesignScript.Runtime;
+#endregion
+
+namespace FemDesign
+{
+    [IsVisibleInDynamoLibrary(false)]
+    public partial class ConstructionStages
+    {
+
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Dynamo/Dynamo/Stage/Stage.cs b/FemDesign.Dynamo/Dynamo/Stage/Stage.cs
new file mode 100644
index 000000000..dcb3b81f8
--- /dev/null
+++ b/FemDesign.Dynamo/Dynamo/Stage/Stage.cs
@@ -0,0 +1,21 @@
+using System;
+using System.Xml.Serialization;
+using System.Globalization;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+using FemDesign.GenericClasses;
+
+#region dynamo
+using Autodesk.DesignScript.Runtime;
+#endregion
+
+namespace FemDesign
+{
+    [IsVisibleInDynamoLibrary(false)]
+    public partial class Stage
+    {
+
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Dynamo/Dynamo/StructureGrid/Axis.cs b/FemDesign.Dynamo/Dynamo/StructureGrid/Axis.cs
index 78cfe4467..b65246bf7 100644
--- a/FemDesign.Dynamo/Dynamo/StructureGrid/Axis.cs
+++ b/FemDesign.Dynamo/Dynamo/StructureGrid/Axis.cs
@@ -22,8 +22,8 @@ public partial class Axis: EntityBase
         public static Axis Define(Autodesk.DesignScript.Geometry.Line line, [DefaultArgument("")] string prefix, int id, [DefaultArgument("false")] bool idIsLetter)
         {
             // convert geometry
-            Geometry.FdPoint3d p0 = Geometry.FdPoint3d.FromDynamo(line.StartPoint);
-            Geometry.FdPoint3d p1 = Geometry.FdPoint3d.FromDynamo(line.EndPoint);
+            Geometry.Point3d p0 = Geometry.Point3d.FromDynamo(line.StartPoint);
+            Geometry.Point3d p1 = Geometry.Point3d.FromDynamo(line.EndPoint);
 
             //
             return new Axis(p0, p1, prefix, id, idIsLetter);
diff --git a/FemDesign.Dynamo/Dynamo/StructureGrid/Storey.cs b/FemDesign.Dynamo/Dynamo/StructureGrid/Storey.cs
index 8bae6b0b0..03bad591a 100644
--- a/FemDesign.Dynamo/Dynamo/StructureGrid/Storey.cs
+++ b/FemDesign.Dynamo/Dynamo/StructureGrid/Storey.cs
@@ -24,8 +24,8 @@ public partial class Storey: EntityBase
         public static Storey Define(string name, Autodesk.DesignScript.Geometry.Point origo, [DefaultArgument("Autodesk.DesignScript.Geometry.Vector.XAxis()")] Autodesk.DesignScript.Geometry.Vector direction, double dimensionX = 50, double dimensionY = 30)
         {
             // convert geometry
-            Geometry.FdPoint3d p = Geometry.FdPoint3d.FromDynamo(origo);
-            Geometry.FdVector3d v = Geometry.FdVector3d.FromDynamo(direction);
+            Geometry.Point3d p = Geometry.Point3d.FromDynamo(origo);
+            Geometry.Vector3d v = Geometry.Vector3d.FromDynamo(direction);
 
             // return
             return new Storey(p, v, dimensionX, dimensionY, name);
diff --git a/FemDesign.Dynamo/Dynamo/Supports/LineSupport.cs b/FemDesign.Dynamo/Dynamo/Supports/LineSupport.cs
index 3c6125c96..0860b153d 100644
--- a/FemDesign.Dynamo/Dynamo/Supports/LineSupport.cs
+++ b/FemDesign.Dynamo/Dynamo/Supports/LineSupport.cs
@@ -7,7 +7,7 @@
 namespace FemDesign.Supports
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class LineSupport: EntityBase
+    public partial class LineSupport: NamedEntityBase
     {
         /// <summary>
         /// Create a rigid line support element.
@@ -28,7 +28,7 @@ public static LineSupport Rigid(Autodesk.DesignScript.Geometry.Curve curve, [Def
             // set local y-axis
             if (!localY.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                obj.Group.LocalY = FemDesign.Geometry.FdVector3d.FromDynamo(localY);
+                obj.Group.LocalY = FemDesign.Geometry.Vector3d.FromDynamo(localY);
             }
 
             // else orient coordinate system to GCS
@@ -62,7 +62,7 @@ public static LineSupport Hinged(Autodesk.DesignScript.Geometry.Curve curve, [De
             // set local y-axis
             if (!localY.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                obj.Group.LocalY = FemDesign.Geometry.FdVector3d.FromDynamo(localY);
+                obj.Group.LocalY = FemDesign.Geometry.Vector3d.FromDynamo(localY);
             }
 
             // else orient coordinate system to GCS
@@ -98,7 +98,7 @@ public static LineSupport Define(Autodesk.DesignScript.Geometry.Curve curve, Mot
             // set local y-axis
             if (!localY.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                obj.Group.LocalY = FemDesign.Geometry.FdVector3d.FromDynamo(localY);
+                obj.Group.LocalY = FemDesign.Geometry.Vector3d.FromDynamo(localY);
             }
 
             // else orient coordinate system to GCS
diff --git a/FemDesign.Dynamo/Dynamo/Supports/PointSupport.cs b/FemDesign.Dynamo/Dynamo/Supports/PointSupport.cs
index ebbe04e20..4d4a7c99e 100644
--- a/FemDesign.Dynamo/Dynamo/Supports/PointSupport.cs
+++ b/FemDesign.Dynamo/Dynamo/Supports/PointSupport.cs
@@ -7,7 +7,7 @@
 namespace FemDesign.Supports
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class PointSupport: EntityBase
+    public partial class PointSupport: NamedEntityBase
     {
         /// <summary>
         /// Create a rigid point support element.
@@ -19,7 +19,7 @@ public partial class PointSupport: EntityBase
         [IsVisibleInDynamoLibrary(true)]
         public static PointSupport Rigid(Autodesk.DesignScript.Geometry.Point point, [DefaultArgument("S")] string identifier)
         {
-            return PointSupport.Rigid(Geometry.FdPoint3d.FromDynamo(point), identifier);
+            return PointSupport.Rigid(Geometry.Point3d.FromDynamo(point), identifier);
         }
 
         /// <summary>
@@ -32,7 +32,7 @@ public static PointSupport Rigid(Autodesk.DesignScript.Geometry.Point point, [De
         [IsVisibleInDynamoLibrary(true)]
         public static PointSupport Hinged(Autodesk.DesignScript.Geometry.Point point, [DefaultArgument("S")] string identifier)
         {
-            return PointSupport.Hinged(Geometry.FdPoint3d.FromDynamo(point), identifier);
+            return PointSupport.Hinged(Geometry.Point3d.FromDynamo(point), identifier);
         }
 
         /// <summary>
@@ -49,7 +49,7 @@ public static PointSupport Hinged(Autodesk.DesignScript.Geometry.Point point, [D
         [IsVisibleInDynamoLibrary(true)]
         public static PointSupport Define(Autodesk.DesignScript.Geometry.Point point, Motions motions, [DefaultArgument("MotionsPlasticLimits.Default()")] MotionsPlasticLimits motionsPlasticLimits, Rotations rotations, [DefaultArgument("RotationsPlasticLimits.Default()")] RotationsPlasticLimits rotationsPlasticLimits, [DefaultArgument("S")] string identifier)
         {
-            return new PointSupport(Geometry.FdPoint3d.FromDynamo(point), motions, motionsPlasticLimits, rotations, rotationsPlasticLimits, identifier);
+            return new PointSupport(Geometry.Point3d.FromDynamo(point), motions, motionsPlasticLimits, rotations, rotationsPlasticLimits, identifier);
         }
 
         internal Autodesk.DesignScript.Geometry.Point GetDynamoGeometry()
diff --git a/FemDesign.Dynamo/Dynamo/Supports/SurfaceSupport.cs b/FemDesign.Dynamo/Dynamo/Supports/SurfaceSupport.cs
index 8539675eb..63186461b 100644
--- a/FemDesign.Dynamo/Dynamo/Supports/SurfaceSupport.cs
+++ b/FemDesign.Dynamo/Dynamo/Supports/SurfaceSupport.cs
@@ -7,7 +7,7 @@
 namespace FemDesign.Supports
 {
     [IsVisibleInDynamoLibrary(false)]
-    public partial class SurfaceSupport: EntityBase
+    public partial class SurfaceSupport: NamedEntityBase
     {
         /// <summary>
         /// Create a SurfaceSupport element.
@@ -29,13 +29,13 @@ public static SurfaceSupport SurfaceSupportDefine(Autodesk.DesignScript.Geometry
             // set local x-axis
             if (!localX.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                obj.CoordinateSystem.SetXAroundZ(FemDesign.Geometry.FdVector3d.FromDynamo(localX));
+                obj.CoordinateSystem.SetXAroundZ(FemDesign.Geometry.Vector3d.FromDynamo(localX));
             }
 
             // set local z-axis
             if (!localZ.Equals(Autodesk.DesignScript.Geometry.Vector.ByCoordinates(0,0,0)))
             {
-                obj.CoordinateSystem.SetZAroundX(FemDesign.Geometry.FdVector3d.FromDynamo(localZ));
+                obj.CoordinateSystem.SetZAroundX(FemDesign.Geometry.Vector3d.FromDynamo(localZ));
             }
 
             return obj;
diff --git a/FemDesign.Dynamo/FemDesign.Dynamo.csproj b/FemDesign.Dynamo/FemDesign.Dynamo.csproj
index ebdd4d133..2d6b0ed0e 100644
--- a/FemDesign.Dynamo/FemDesign.Dynamo.csproj
+++ b/FemDesign.Dynamo/FemDesign.Dynamo.csproj
@@ -83,6 +83,9 @@
     <Compile Include="..\FemDesign.Core\Bars\BarPart.cs">
       <Link>Core\Bars\BarPart.cs</Link>
     </Compile>
+    <Compile Include="..\FemDesign.Core\Bars\BarStiffnessFactors.cs">
+      <Link>Core\Bars\BarStiffnessFactors.cs</Link>
+    </Compile>
     <Compile Include="..\FemDesign.Core\Bars\Beam.cs">
       <Link>Core\Bars\Beam.cs</Link>
     </Compile>
@@ -128,6 +131,9 @@
     <Compile Include="..\FemDesign.Core\Calculate\Bsc.cs">
       <Link>Core\Calculate\Bsc.cs</Link>
     </Compile>
+    <Compile Include="..\FemDesign.Core\Calculate\CmdApplyDesignChanges.cs">
+      <Link>Core\Calculate\CmdApplyDesignChanges.cs</Link>
+    </Compile>
     <Compile Include="..\FemDesign.Core\Calculate\CmdCalculation.cs">
       <Link>Core\Calculate\CmdCalculation.cs</Link>
     </Compile>
@@ -161,9 +167,6 @@
     <Compile Include="..\FemDesign.Core\Calculate\CombItem.cs">
       <Link>Core\Calculate\CombItem.cs</Link>
     </Compile>
-    <Compile Include="..\FemDesign.Core\Calculate\ConstructionStage.cs">
-      <Link>Core\Calculate\ConstructionStage.cs</Link>
-    </Compile>
     <Compile Include="..\FemDesign.Core\Calculate\Design.cs">
       <Link>Core\Calculate\Design.cs</Link>
     </Compile>
@@ -194,6 +197,9 @@
     <Compile Include="..\FemDesign.Core\Calculate\Options.cs">
       <Link>Core\Calculate\Options.cs</Link>
     </Compile>
+    <Compile Include="..\FemDesign.Core\Calculate\Stage.cs">
+      <Link>Core\Calculate\Stage.cs</Link>
+    </Compile>
     <Compile Include="..\FemDesign.Core\GenericClasses\Camber.cs">
       <Link>Core\GenericClasses\Camber.cs</Link>
     </Compile>
@@ -224,6 +230,9 @@
     <Compile Include="..\FemDesign.Core\GenericClasses\ILoadElement.cs">
       <Link>Core\GenericClasses\ILoadElement.cs</Link>
     </Compile>
+    <Compile Include="..\FemDesign.Core\GenericClasses\INamedEntity.cs">
+      <Link>Core\GenericClasses\INamedEntity.cs</Link>
+    </Compile>
     <Compile Include="..\FemDesign.Core\GenericClasses\IStageElement.cs">
       <Link>Core\GenericClasses\IStageElement.cs</Link>
     </Compile>
@@ -239,6 +248,9 @@
     <Compile Include="..\FemDesign.Core\GenericClasses\LocationValue.cs">
       <Link>Core\GenericClasses\LocationValue.cs</Link>
     </Compile>
+    <Compile Include="..\FemDesign.Core\GenericClasses\NamedEntityBase.cs">
+      <Link>Core\GenericClasses\NamedEntityBase.cs</Link>
+    </Compile>
     <Compile Include="..\FemDesign.Core\GenericClasses\RestrictedDouble.cs">
       <Link>Core\GenericClasses\RestrictedDouble.cs</Link>
     </Compile>
@@ -254,12 +266,21 @@
     <Compile Include="..\FemDesign.Core\GenericClasses\StartEndType.cs">
       <Link>Core\GenericClasses\StartEndType.cs</Link>
     </Compile>
+    <Compile Include="..\FemDesign.Core\GenericClasses\TextFormatting.cs">
+      <Link>Core\GenericClasses\TextFormatting.cs</Link>
+    </Compile>
     <Compile Include="..\FemDesign.Core\GenericClasses\Tolerance.cs">
       <Link>Core\GenericClasses\Tolerance.cs</Link>
     </Compile>
     <Compile Include="..\FemDesign.Core\GenericClasses\VerticalAlignmentEnum.cs">
       <Link>Core\GenericClasses\VerticalAlignmentEnum.cs</Link>
     </Compile>
+    <Compile Include="..\FemDesign.Core\Geometry\ArcEdge.cs">
+      <Link>Core\Geometry\ArcEdge.cs</Link>
+    </Compile>
+    <Compile Include="..\FemDesign.Core\Geometry\CircleEdge.cs">
+      <Link>Core\Geometry\CircleEdge.cs</Link>
+    </Compile>
     <Compile Include="..\FemDesign.Core\Geometry\Contour.cs">
       <Link>Core\Geometry\Contour.cs</Link>
     </Compile>
@@ -272,20 +293,26 @@
     <Compile Include="..\FemDesign.Core\Geometry\Face.cs">
       <Link>Core\Geometry\Face.cs</Link>
     </Compile>
-    <Compile Include="..\FemDesign.Core\Geometry\FdCoordinateSystem.cs">
-      <Link>Core\Geometry\FdCoordinateSystem.cs</Link>
+    <Compile Include="..\FemDesign.Core\Geometry\CoordinateSystem.cs">
+      <Link>Core\Geometry\CoordinateSystem.cs</Link>
+    </Compile>
+    <Compile Include="..\FemDesign.Core\Geometry\LineEdge.cs">
+      <Link>Core\Geometry\LineEdge.cs</Link>
     </Compile>
-    <Compile Include="..\FemDesign.Core\Geometry\FdPoint2d.cs">
-      <Link>Core\Geometry\FdPoint2d.cs</Link>
+    <Compile Include="..\FemDesign.Core\Geometry\Point2d.cs">
+      <Link>Core\Geometry\Point2d.cs</Link>
     </Compile>
-    <Compile Include="..\FemDesign.Core\Geometry\FdPoint3d.cs">
-      <Link>Core\Geometry\FdPoint3d.cs</Link>
+    <Compile Include="..\FemDesign.Core\Geometry\Point3d.cs">
+      <Link>Core\Geometry\Point3d.cs</Link>
     </Compile>
-    <Compile Include="..\FemDesign.Core\Geometry\FdVector2d.cs">
-      <Link>Core\Geometry\FdVector2d.cs</Link>
+    <Compile Include="..\FemDesign.Core\Geometry\Proximity.cs">
+      <Link>Core\Geometry\Proximity.cs</Link>
     </Compile>
-    <Compile Include="..\FemDesign.Core\Geometry\FdVector3d.cs">
-      <Link>Core\Geometry\FdVector3d.cs</Link>
+    <Compile Include="..\FemDesign.Core\Geometry\Vector2d.cs">
+      <Link>Core\Geometry\Vector2d.cs</Link>
+    </Compile>
+    <Compile Include="..\FemDesign.Core\Geometry\Vector3d.cs">
+      <Link>Core\Geometry\Vector3d.cs</Link>
     </Compile>
     <Compile Include="..\FemDesign.Core\Geometry\LineSegment.cs">
       <Link>Core\Geometry\LineSegment.cs</Link>
@@ -344,6 +371,9 @@
     <Compile Include="..\FemDesign.Core\Loads\LoadCombination.cs">
       <Link>Core\Loads\LoadCombination.cs</Link>
     </Compile>
+    <Compile Include="..\FemDesign.Core\Loads\LoadCombinationCaseBase.cs">
+      <Link>Core\Loads\LoadCombinationCaseBase.cs</Link>
+    </Compile>
     <Compile Include="..\FemDesign.Core\Loads\LoadCombTypeEnum.cs">
       <Link>Core\Loads\LoadCombTypeEnum.cs</Link>
     </Compile>
@@ -392,6 +422,9 @@
     <Compile Include="..\FemDesign.Core\Loads\PressureLoad.cs">
       <Link>Core\Loads\PressureLoad.cs</Link>
     </Compile>
+    <Compile Include="..\FemDesign.Core\Loads\StageLoadCase.cs">
+      <Link>Core\Loads\StageLoadCase.cs</Link>
+    </Compile>
     <Compile Include="..\FemDesign.Core\Loads\SurfaceLoad.cs">
       <Link>Core\Loads\SurfaceLoad.cs</Link>
     </Compile>
@@ -596,6 +629,9 @@
     <Compile Include="..\FemDesign.Core\Releases\RigidityDataLibType3.cs">
       <Link>Core\Releases\RigidityDataLibType3.cs</Link>
     </Compile>
+    <Compile Include="..\FemDesign.Core\Releases\RigidityDataType0.cs">
+      <Link>Core\Releases\RigidityDataType0.cs</Link>
+    </Compile>
     <Compile Include="..\FemDesign.Core\Releases\RigidityDataType1.cs">
       <Link>Core\Releases\RigidityDataType1.cs</Link>
     </Compile>
@@ -686,6 +722,9 @@
     <Compile Include="..\FemDesign.Core\Results\Node\PointSupportReaction.cs">
       <Link>Core\Results\PointSupportReaction.cs</Link>
     </Compile>
+    <Compile Include="..\FemDesign.Core\Results\Node\PointSupportReactionMinMax.cs">
+      <Link>Core\Results\PointSupportReactionMinMax.cs</Link>
+    </Compile>
     <Compile Include="..\FemDesign.Core\Results\QuantityEstimation.cs">
       <Link>Core\Results\QuantityEstimation.cs</Link>
     </Compile>
@@ -695,9 +734,6 @@
     <Compile Include="..\FemDesign.Core\Results\ResultsReader.cs">
       <Link>Core\Results\ResultsReader.cs</Link>
     </Compile>
-    <Compile Include="..\FemDesign.Core\Results\ResultTypeEnum.cs">
-      <Link>Core\Results\ResultTypeEnum.cs</Link>
-    </Compile>
     <Compile Include="..\FemDesign.Core\Results\Shell\ShellDerivedForce.cs">
       <Link>Core\Results\ShellDerivedForce.cs</Link>
     </Compile>
@@ -761,6 +797,9 @@
     <Compile Include="..\FemDesign.Core\Shells\SlabPart.cs">
       <Link>Core\Shells\SlabPart.cs</Link>
     </Compile>
+    <Compile Include="..\FemDesign.Core\Shells\SlabStiffnessFactors.cs">
+      <Link>Core\Shells\SlabStiffnessFactors.cs</Link>
+    </Compile>
     <Compile Include="..\FemDesign.Core\Shells\SlabTypeEnum.cs">
       <Link>Core\Shells\SlabTypeEnum.cs</Link>
     </Compile>
@@ -770,15 +809,6 @@
     <Compile Include="..\FemDesign.Core\Shells\WallCorbel.cs">
       <Link>Core\Shells\WallCorbel.cs</Link>
     </Compile>
-    <Compile Include="..\FemDesign.Core\Stage\ActivatedLoadCase.cs">
-      <Link>Core\AdvancedFem\ActivatedLoadCase.cs</Link>
-    </Compile>
-    <Compile Include="..\FemDesign.Core\Stage\ConstructionStages.cs">
-      <Link>Core\AdvancedFem\ConstructionStages.cs</Link>
-    </Compile>
-    <Compile Include="..\FemDesign.Core\Stage\Stage.cs">
-      <Link>Core\AdvancedFem\Stage.cs</Link>
-    </Compile>
     <Compile Include="..\FemDesign.Core\StructureGrid\Axes.cs">
       <Link>Core\StructureGrid\Axes.cs</Link>
     </Compile>
@@ -812,9 +842,21 @@
     <Compile Include="..\FemDesign.Core\Supports\PointSupport.cs">
       <Link>Core\Supports\PointSupport.cs</Link>
     </Compile>
+    <Compile Include="..\FemDesign.Core\Supports\StiffnessPoints.cs">
+      <Link>Core\Supports\StiffnessPoints.cs</Link>
+    </Compile>
     <Compile Include="..\FemDesign.Core\Supports\Supports.cs">
       <Link>Core\Supports\Supports.cs</Link>
     </Compile>
+    <Compile Include="..\FemDesign.Core\Stage\Stage.cs">
+      <Link>Core\Stage\Stage.cs</Link>
+    </Compile>
+    <Compile Include="..\FemDesign.Core\Stage\ConstructionStages.cs">
+      <Link>Core\Stage\ConstructionStages.cs</Link>
+    </Compile>
+    <Compile Include="..\FemDesign.Core\Stage\ActivatedLoadCase.cs">
+      <Link>Core\Stage\ActivatedLoadCase.cs</Link>
+    </Compile>
     <Compile Include="..\FemDesign.Core\Supports\SurfaceSupport.cs">
       <Link>Core\Supports\SurfaceSupport.cs</Link>
     </Compile>
@@ -865,17 +907,18 @@
     <Compile Include="Dynamo\GenericClasses\GuidListType.cs" />
     <Compile Include="Dynamo\GenericClasses\LibraryBase.cs" />
     <Compile Include="Dynamo\GenericClasses\LocationValue.cs" />
+    <Compile Include="Dynamo\GenericClasses\NamedEntityBase.cs" />
     <Compile Include="Dynamo\GenericClasses\RestrictedObject.cs" />
     <Compile Include="Dynamo\GenericClasses\StartEndType.cs" />
     <Compile Include="Dynamo\GenericClasses\Tolerance.cs" />
     <Compile Include="Dynamo\Geometry\Contour.cs" />
     <Compile Include="Dynamo\Geometry\Face.cs" />
     <Compile Include="Dynamo\Geometry\Edge.cs" />
-    <Compile Include="Dynamo\Geometry\FdCoordinateSystem.cs" />
-    <Compile Include="Dynamo\Geometry\FdPoint2d.cs" />
-    <Compile Include="Dynamo\Geometry\FdPoint3d.cs" />
-    <Compile Include="Dynamo\Geometry\FdVector2d.cs" />
-    <Compile Include="Dynamo\Geometry\FdVector3d.cs" />
+    <Compile Include="Dynamo\Geometry\CoordinateSystem.cs" />
+    <Compile Include="Dynamo\Geometry\Point2d.cs" />
+    <Compile Include="Dynamo\Geometry\Point3d.cs" />
+    <Compile Include="Dynamo\Geometry\Vector2d.cs" />
+    <Compile Include="Dynamo\Geometry\Vector3d.cs" />
     <Compile Include="Dynamo\Geometry\LineSegment.cs" />
     <Compile Include="Dynamo\Geometry\Polyline.cs" />
     <Compile Include="Dynamo\Geometry\RectangleType.cs" />
@@ -983,6 +1026,7 @@
     <Compile Include="Dynamo\Results\NodalResponseFactor.cs" />
     <Compile Include="Dynamo\Results\NodalVibration.cs" />
     <Compile Include="Dynamo\Results\PointSupportReaction.cs" />
+    <Compile Include="Dynamo\Results\PointSupportReactionMinMax.cs" />
     <Compile Include="Dynamo\Results\QuantityEstimation.cs" />
     <Compile Include="Dynamo\Results\ResultAttribute.cs" />
     <Compile Include="Dynamo\Results\ResultReader.cs" />
@@ -1007,6 +1051,8 @@
     <Compile Include="Dynamo\Shells\SlabPart.cs" />
     <Compile Include="Dynamo\Shells\Thickness.cs" />
     <Compile Include="Dynamo\Shells\WallCorbel.cs" />
+    <Compile Include="Dynamo\Stage\ActivatedLoadCase.cs" />
+    <Compile Include="Dynamo\Stage\Stage.cs" />
     <Compile Include="Dynamo\StructureGrid\Axes.cs" />
     <Compile Include="Dynamo\StructureGrid\Axis.cs" />
     <Compile Include="Dynamo\StructureGrid\Storey.cs" />
@@ -1017,6 +1063,7 @@
     <Compile Include="Dynamo\Supports\PointSupport.cs" />
     <Compile Include="Dynamo\Supports\Supports.cs" />
     <Compile Include="Dynamo\Supports\SurfaceSupport.cs" />
+    <Compile Include="Dynamo\Stage\ConstructionStages.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Properties\Resources.Designer.cs">
       <AutoGen>True</AutoGen>
diff --git a/FemDesign.Examples/C#/Example 1 - Creating a simple beam/Program.cs b/FemDesign.Examples/C#/Example 1 - Creating a simple beam/Program.cs
index 9c5b3c7d4..3efa994a6 100644
--- a/FemDesign.Examples/C#/Example 1 - Creating a simple beam/Program.cs	
+++ b/FemDesign.Examples/C#/Example 1 - Creating a simple beam/Program.cs	
@@ -50,7 +50,8 @@ static void Main()
             // Create load cases
             var deadload = new Loads.LoadCase("Deadload", Loads.LoadCaseType.DeadLoad, Loads.LoadCaseDuration.Permanent);
             var liveload = new Loads.LoadCase("Liveload", Loads.LoadCaseType.Static, Loads.LoadCaseDuration.Permanent);
-            var loadcases = new List<Loads.LoadCase>() { deadload, liveload };
+            var stressload = new Loads.LoadCase("Stresses", Loads.LoadCaseType.Static, Loads.LoadCaseDuration.Permanent);
+            var loadcases = new List<Loads.LoadCase>() { deadload, liveload, stressload };
 
 
             // Create load combinations
@@ -71,10 +72,13 @@ static void Main()
             var lineLoadEnd = new Geometry.Vector3d(0.0, 0.0, -4.0);
             var lineLoad = Loads.LineLoad.VariableForce(edge, lineLoadStart, lineLoadEnd, liveload);
 
+            var lineStress = new Loads.LineStressLoad(edge, 10, stressload);
+
             var loads = new List<GenericClasses.ILoadElement>() {
                 pointForce,
                 pointMoment,
-                lineLoad
+                lineLoad,
+                lineStress
             };
 
 
diff --git a/FemDesign.Examples/C#/Example 3 - Analyse a beam/Program.cs b/FemDesign.Examples/C#/Example 3 - Analyse a beam/Program.cs
index fa1a4edba..f9b9091e4 100644
--- a/FemDesign.Examples/C#/Example 3 - Analyse a beam/Program.cs	
+++ b/FemDesign.Examples/C#/Example 3 - Analyse a beam/Program.cs	
@@ -123,11 +123,6 @@ static void Main()
 
             // Run a specific analysis
             model.RunAnalysis(analysisType, resultTypes: results, cmdGlobalCfg: config, endSession: true);
-
-
-
-            // TO DO
-            //model.ReadResult(ResultType);
         }
     }
-}
+}
\ No newline at end of file
diff --git a/FemDesign.Examples/C#/Example10 - ConstructionStages/Program.cs b/FemDesign.Examples/C#/Example10 - ConstructionStages/Program.cs
index 80a40fb91..92cface1f 100644
--- a/FemDesign.Examples/C#/Example10 - ConstructionStages/Program.cs	
+++ b/FemDesign.Examples/C#/Example10 - ConstructionStages/Program.cs	
@@ -90,13 +90,6 @@ static void Main(string[] args)
             var imposedCase = new Loads.LoadCase("IMPOSED", Loads.LoadCaseType.Static, Loads.LoadCaseDuration.Permanent);
             var loadcases = new List<Loads.LoadCase>() { deadLoadCase, windCase, imposedCase };
 
-            // Create load combinations
-            var slsFactors = new List<double>() { 1.0, 1.0, 1.0 };
-            var SLS = new Loads.LoadCombination("SLS", Loads.LoadCombType.ServiceabilityCharacteristic, loadcases, slsFactors);
-            var ulsFactors = new List<double>() { 1.35, 1.5, 1.2 };
-            var ULS = new Loads.LoadCombination("ULS", Loads.LoadCombType.UltimateOrdinary, loadcases, ulsFactors);
-            var loadCombinations = new List<Loads.LoadCombination>() { SLS, ULS };
-
             // Create loads
             var pointMoment = new Loads.PointLoad(p2, new Geometry.Vector3d(0.0, 5.0, 0.0), deadLoadCase, null, Loads.ForceLoadType.Moment);
 
@@ -123,12 +116,22 @@ static void Main(string[] args)
             // Create the stages
             var stage1 = new Stage(1, "STAGE_1", stageOneLoadCases, elementsStageOne);
             var stage2 = new Stage(2, "STAGE_2", stageTwoLoadCases, elementsStageTwo);
-            var stage3 = new Stage(3, "STAGE_3", null, elementsStageThree);
-            var stage4 = new Stage(4, "STAGE_4", null, null);
-            var stage5 = new Stage(5, "STAGE_5", null, null);
+            var stage3 = new Stage(3, "STAGE_3", elements: elementsStageThree);
+            var stage4 = new Stage(4, "STAGE_4");
+            var stage5 = new Stage(5, "STAGE_5");
 
             var stages = new List<Stage>() { stage1, stage2, stage3, stage4, stage5 };
 
+
+            // Create load combinations
+            var slsFactors = new List<double>() { 1.0, 1.0, 1.0 };
+            var SLS = new Loads.LoadCombination("SLS", Loads.LoadCombType.ServiceabilityCharacteristic, loadcases, slsFactors);
+            var ulsFactors = new List<double>() { 1.35, 1.5, 1.2 };
+            var ULS = new Loads.LoadCombination("ULS", Loads.LoadCombType.UltimateOrdinary, loadcases, ulsFactors);
+            var CSCombination = new Loads.LoadCombination("Stage combination", Loads.LoadCombType.UltimateOrdinary, loadcases, ulsFactors);
+            CSCombination.SetStageLoadCase(stage1, 1.0);
+            var loadCombinations = new List<Loads.LoadCombination>() { SLS, ULS, CSCombination };
+
             // Create the model
             Model model = new Model(Country.S);
             model.AddElements(elements);
diff --git a/FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/CreateStiffnessPoints.sln b/FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/CreateStiffnessPoints.sln
new file mode 100644
index 000000000..6ecc539cf
--- /dev/null
+++ b/FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/CreateStiffnessPoints.sln	
@@ -0,0 +1,25 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.1.32421.90
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CreateStiffnessPoints", "CreateStiffnessPoints.csproj", "{BE21154D-59B3-40F1-A567-14312741EFD5}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{BE21154D-59B3-40F1-A567-14312741EFD5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{BE21154D-59B3-40F1-A567-14312741EFD5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{BE21154D-59B3-40F1-A567-14312741EFD5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{BE21154D-59B3-40F1-A567-14312741EFD5}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {46A8FE65-03A3-490A-9D1A-E2503F24BD9B}
+	EndGlobalSection
+EndGlobal
diff --git a/FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/Parse.cs b/FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/Parse.cs
new file mode 100644
index 000000000..8db84c234
--- /dev/null
+++ b/FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/Parse.cs	
@@ -0,0 +1,30 @@
+using Newtonsoft.Json;
+
+namespace FemDesign.Examples
+{
+    public class DataParser
+    {
+        public static string ConvertCsvFileToJsonObject(string path)
+        {
+            var csv = new List<string[]>();
+            var lines = File.ReadAllLines(path);
+
+            foreach (string line in lines)
+                csv.Add(line.Split(','));
+
+            var properties = lines[0].Split(',');
+
+            var listObjResult = new List<Dictionary<string, string>>();
+
+            for (int i = 1; i < lines.Length; i++)
+            {
+                var objResult = new Dictionary<string, string>();
+                for (int j = 0; j < properties.Length; j++)
+                    objResult.Add(properties[j], csv[i][j]);
+
+                listObjResult.Add(objResult);
+            }
+            return JsonConvert.SerializeObject(listObjResult);
+        }
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/PointLocation.txt b/FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/PointLocation.txt
new file mode 100644
index 000000000..a80667373
--- /dev/null
+++ b/FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/PointLocation.txt	
@@ -0,0 +1,6 @@
+X,Y,Z
+1,1,0
+3,1,0
+3,3,0
+1,3,0
+2,2,0
\ No newline at end of file
diff --git a/FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/Practical example - Stiffness Point from CSV.csproj b/FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/Practical example - Stiffness Point from CSV.csproj
new file mode 100644
index 000000000..d471b5bbf
--- /dev/null
+++ b/FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/Practical example - Stiffness Point from CSV.csproj	
@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\..\FemDesign.Core\FemDesign.Core.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="PointLocation.txt">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
+</Project>
diff --git a/FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/Program.cs b/FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/Program.cs
new file mode 100644
index 000000000..401e06422
--- /dev/null
+++ b/FemDesign.Examples/C#/Practical example - Create Stiffness Point from a CSV/Program.cs	
@@ -0,0 +1,38 @@
+using FemDesign.Examples;
+using FemDesign;
+using Newtonsoft.Json;
+
+// Convert the csv file data to a Point3d object
+var jsonObject = DataParser.ConvertCsvFileToJsonObject("PointLocation.txt");
+var points = JsonConvert.DeserializeObject<FemDesign.Geometry.Point3d[]>(jsonObject);
+if (points is null || points.Length < 1)
+    throw new Exception("Empty json file.");
+
+// Empty List to contain all the Structural Elements
+var struElements = new List<FemDesign.GenericClasses.IStructureElement>();
+
+// Define Stiffness
+var motionsSurface = new FemDesign.Releases.Motions(10000, 10000, 10000, 10000, 10000, 10000);
+var motionsPoint = new FemDesign.Releases.Motions(10, 10, 10, 10, 10, 10);
+
+
+// Define Geometry
+var region = FemDesign.Geometry.Region.RectangleXY(FemDesign.Geometry.Point3d.Origin, 4, 4);
+
+// Create a Surface Support
+var surfaceSupport = new FemDesign.Supports.SurfaceSupport(region, motionsSurface, null);
+struElements.Add(surfaceSupport);
+
+
+// Create the stiffness points
+foreach (var point in points)
+{
+	var stiffPoints = new FemDesign.Supports.StiffnessPoint(surfaceSupport, point, motionsPoint);
+	struElements.Add(stiffPoints);
+}
+
+// Create Model
+var model = new FemDesign.Model(FemDesign.Country.S);
+model.AddElements(struElements);
+
+model.Open();
\ No newline at end of file
diff --git a/FemDesign.Examples/Grasshopper/Example 5 - Using custom sections.gh b/FemDesign.Examples/Grasshopper/Example 5 - Using custom sections.gh
index e18b394dfc7b6c10ab9f7c4adba5c26c986e8744..d2cfaa81cf98eb1bbac84f478d628931f7e7fc78 100644
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diff --git a/FemDesign.Examples/Grasshopper/Example 5 - my example section.struxml b/FemDesign.Examples/Grasshopper/Example 5 - my example section.struxml
index 02d1e9b65..2db17c540 100644
--- a/FemDesign.Examples/Grasshopper/Example 5 - my example section.struxml	
+++ b/FemDesign.Examples/Grasshopper/Example 5 - my example section.struxml	
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-    <section last_change="2022-05-05T09:56:32.333" guid="67bd4c1f-3332-40b7-b4da-0ba4df61f08b" action="added" fd_name_code="My custom sections" fd_name_type="Concrete" fd_name_size="Custom 300" name="Custom I-section" type="custom" fd-mat="3">
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diff --git a/FemDesign.Grasshopper/Bars/BarsBeam.cs b/FemDesign.Grasshopper/Bars/BarsBeam.cs
index b2f30d91c..4d146fd73 100644
--- a/FemDesign.Grasshopper/Bars/BarsBeam.cs
+++ b/FemDesign.Grasshopper/Bars/BarsBeam.cs
@@ -19,9 +19,7 @@ protected override void RegisterInputParams(GH_InputParamManager pManager)
         {
             pManager.AddCurveParameter("Curve", "Curve", "LineCurve or ArcCurve", GH_ParamAccess.item);
             pManager.AddGenericParameter("Material", "Material", "Material.", GH_ParamAccess.item);
-            pManager[pManager.ParamCount - 1].Optional = true;
             pManager.AddGenericParameter("Section", "Section", "Section. If 1 item this item defines both start and end. If two items the first item defines the start and the last item defines the end.", GH_ParamAccess.list);
-            pManager[pManager.ParamCount - 1].Optional = true;
             pManager.AddGenericParameter("Connectivity", "Connectivity", "Connectivity. If 1 item this item defines both start and end. If two items the first item defines the start and the last item defines the end. Optional, default value if undefined.", GH_ParamAccess.list);
             pManager[pManager.ParamCount - 1].Optional = true;
             pManager.AddGenericParameter("Eccentricity", "Eccentricity", "Eccentricity. If 1 item this item defines both start and end. If two items the first item defines the start and the last item defines the end. Optional, default value if undefined.", GH_ParamAccess.list);
@@ -44,17 +42,10 @@ protected override void SolveInstance(IGH_DataAccess DA)
             if (!DA.GetData(0, ref curve)) { return; }
 
             FemDesign.Materials.Material material = null;
-            if (!DA.GetData(1, ref material))
-            {
-                material = FemDesign.Materials.MaterialDatabase.GetDefault().MaterialByName("C30/37");
-            }
+            if (!DA.GetData(1, ref material)) { return; }
 
             List<FemDesign.Sections.Section> sections = new List<Sections.Section>();
-            if (!DA.GetDataList(2, sections))
-            {
-                sections = new List<Sections.Section>();
-                sections.Add(FemDesign.Sections.SectionDatabase.GetDefault().SectionByName("Concrete sections, Rectangle, 250x600"));
-            }
+            if (!DA.GetDataList(2, sections)) { return; }
 
             List<FemDesign.Bars.Connectivity> connectivities = new List<Bars.Connectivity>();
             if (!DA.GetDataList(3, connectivities))
@@ -122,7 +113,7 @@ protected override System.Drawing.Bitmap Icon
         }
         public override Guid ComponentGuid
         {
-            get { return new Guid("135b6331-bf19-4d89-9e81-9e5e0d137f67"); }
+            get { return new Guid("{ED5BB11A-1A9A-438E-9BD3-A2283DB9C025}"); }
         }
         public override GH_Exposure Exposure => GH_Exposure.primary;
 
diff --git a/FemDesign.Grasshopper/Bars/BarsColumn.cs b/FemDesign.Grasshopper/Bars/BarsColumn.cs
index 32ddb83ff..db54697b4 100644
--- a/FemDesign.Grasshopper/Bars/BarsColumn.cs
+++ b/FemDesign.Grasshopper/Bars/BarsColumn.cs
@@ -7,63 +7,54 @@
 
 namespace FemDesign.Grasshopper
 {
-    public class BarsColumn: GH_Component
+    public class BarsColumn : GH_Component
     {
-       public BarsColumn(): base("Bars.Column", "Column", "Create a bar element of type column.", CategoryName.Name(),
-            SubCategoryName.Cat2a())
+        public BarsColumn() : base("Bars.Column", "Column", "Create a bar element of type column.", CategoryName.Name(),
+             SubCategoryName.Cat2a())
         {
 
-       }
-       protected override void RegisterInputParams(GH_InputParamManager pManager)
-       {
-           pManager.AddCurveParameter("Line", "Line", "Line. Local x of line must equal positive global Z.", GH_ParamAccess.item);
-           pManager.AddGenericParameter("Material", "Material", "Material.", GH_ParamAccess.item);
-            pManager[pManager.ParamCount - 1].Optional = true;
+        }
+        protected override void RegisterInputParams(GH_InputParamManager pManager)
+        {
+            pManager.AddCurveParameter("Line", "Line", "Line. Local x of line must equal positive global Z.", GH_ParamAccess.item);
+            pManager.AddGenericParameter("Material", "Material", "Material.", GH_ParamAccess.item);
             pManager.AddGenericParameter("Section", "Section", "Section. If 1 item this item defines both start and end. If two items the first item defines the start and the last item defines the end.", GH_ParamAccess.list);
-            pManager[pManager.ParamCount - 1].Optional = true;
             pManager.AddGenericParameter("Connectivity", "Connectivity", "Connectivity. If 1 item this item defines both start and end. If two items the first item defines the start and the last item defines the end. Optional, default value if undefined.", GH_ParamAccess.list);
-           pManager[pManager.ParamCount - 1].Optional = true;
-           pManager.AddGenericParameter("Eccentricity", "Eccentricity", "Eccentricity. If 1 item this item defines both start and end. If two items the first item defines the start and the last item defines the end. Optional, default value if undefined.", GH_ParamAccess.list);
-           pManager[pManager.ParamCount - 1].Optional = true;
-           pManager.AddVectorParameter("LocalY", "LocalY", "Set local y-axis. Vector must be perpendicular to Curve mid-point local x-axis. This parameter overrides OrientLCS", GH_ParamAccess.item);
-           pManager[pManager.ParamCount - 1].Optional = true;
-           pManager.AddBooleanParameter("OrientLCS", "OrientLCS", "Orient LCS to GCS? If true the LCS of this object will be oriented to the GCS trying to align local z to global z if possible or align local y to global y if possible (if object is vertical). If false local y-axis from Curve coordinate system at mid-point will be used.", GH_ParamAccess.item, true);
-           pManager.AddTextParameter("Identifier", "Identifier", "Identifier. Optional, default value if undefined.", GH_ParamAccess.item, "C");
-           pManager[pManager.ParamCount - 1].Optional = true;
-       } 
-       protected override void RegisterOutputParams(GH_OutputParamManager pManager)
-       {
-           pManager.AddGenericParameter("Bar", "Bar", "Bar.", GH_ParamAccess.item);
-       }
-       protected override void SolveInstance(IGH_DataAccess DA)
-       {
-            // get input            
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddGenericParameter("Eccentricity", "Eccentricity", "Eccentricity. If 1 item this item defines both start and end. If two items the first item defines the start and the last item defines the end. Optional, default value if undefined.", GH_ParamAccess.list);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddVectorParameter("LocalY", "LocalY", "Set local y-axis. Vector must be perpendicular to Curve mid-point local x-axis. This parameter overrides OrientLCS", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddBooleanParameter("OrientLCS", "OrientLCS", "Orient LCS to GCS? If true the LCS of this object will be oriented to the GCS trying to align local z to global z if possible or align local y to global y if possible (if object is vertical). If false local y-axis from Curve coordinate system at mid-point will be used.", GH_ParamAccess.item, true);
+            pManager.AddTextParameter("Identifier", "Identifier", "Identifier. Optional, default value if undefined.", GH_ParamAccess.item, "C");
+            pManager[pManager.ParamCount - 1].Optional = true;
+        }
+        protected override void RegisterOutputParams(GH_OutputParamManager pManager)
+        {
+            pManager.AddGenericParameter("Bar", "Bar", "Bar.", GH_ParamAccess.item);
+        }
+        protected override void SolveInstance(IGH_DataAccess DA)
+        {
+            // get input
             Curve curve = null;
             if (!DA.GetData(0, ref curve)) { return; }
 
             FemDesign.Materials.Material material = null;
-            if (!DA.GetData(1, ref material))
-            {
-                material = FemDesign.Materials.MaterialDatabase.GetDefault().MaterialByName("C30/37");
-            }
+            if (!DA.GetData(1, ref material)) { return; }
 
             List<FemDesign.Sections.Section> sections = new List<Sections.Section>();
-            if (!DA.GetDataList(2, sections))
-            {
-                sections = new List<Sections.Section>();
-                sections.Add(FemDesign.Sections.SectionDatabase.GetDefault().SectionByName("Concrete sections, Rectangle, 250x600"));
-            }
+            if (!DA.GetDataList(2, sections)) { return; }
 
             List<FemDesign.Bars.Connectivity> connectivities = new List<Bars.Connectivity>();
             if (!DA.GetDataList(3, connectivities))
             {
-                connectivities = new List<Bars.Connectivity>{FemDesign.Bars.Connectivity.Rigid};
+                connectivities = new List<Bars.Connectivity> { FemDesign.Bars.Connectivity.Rigid };
             }
 
             List<FemDesign.Bars.Eccentricity> eccentricities = new List<Bars.Eccentricity>();
             if (!DA.GetDataList(4, eccentricities))
             {
-                eccentricities = new List<Bars.Eccentricity>{FemDesign.Bars.Eccentricity.Default};
+                eccentricities = new List<Bars.Eccentricity> { FemDesign.Bars.Eccentricity.Default };
             }
 
             Vector3d v = Vector3d.Zero;
@@ -92,9 +83,9 @@ protected override void SolveInstance(IGH_DataAccess DA)
             FemDesign.Geometry.Edge edge = Convert.FromRhinoLineCurve((LineCurve)curve);
 
             // create bar
-             var type = FemDesign.Bars.BarType.Column;
+            var type = FemDesign.Bars.BarType.Column;
             FemDesign.Bars.Bar bar = new FemDesign.Bars.Bar(edge, type, material, sections.ToArray(), eccentricities.ToArray(), connectivities.ToArray(), identifier);
-            
+
             // set local y-axis
             if (!v.Equals(Vector3d.Zero))
             {
@@ -105,26 +96,26 @@ protected override void SolveInstance(IGH_DataAccess DA)
             else
             {
                 if (orientLCS)
-                {  
+                {
                     bar.BarPart.OrientCoordinateSystemToGCS();
                 }
             }
-            
+
             // output
             DA.SetData(0, bar);
 
-       }
-       protected override System.Drawing.Bitmap Icon
-       {
-           get
-           {
+        }
+        protected override System.Drawing.Bitmap Icon
+        {
+            get
+            {
                 return FemDesign.Properties.Resources.ColumnDefine;
-           }
-       }
-       public override Guid ComponentGuid
-       {
-           get { return new Guid("3105b98e-ed85-46f4-9295-ed1d0d1af432"); }
-       }
+            }
+        }
+        public override Guid ComponentGuid
+        {
+            get { return new Guid("{5001B207-03E3-4571-A012-A05B7AC3F717}"); }
+        }
 
         public override GH_Exposure Exposure => GH_Exposure.primary;
     }
diff --git a/FemDesign.Grasshopper/Bars/BarsConnectivityConstruct.cs b/FemDesign.Grasshopper/Bars/BarsConnectivityConstruct.cs
index 6da8f3b04..2694cda70 100644
--- a/FemDesign.Grasshopper/Bars/BarsConnectivityConstruct.cs
+++ b/FemDesign.Grasshopper/Bars/BarsConnectivityConstruct.cs
@@ -14,9 +14,9 @@ public class BarsConnectivityConstruct: GH_Component
         }
         protected override void RegisterInputParams(GH_InputParamManager pManager)
         {
-            pManager.AddBooleanParameter("m_x", "m_x", "Translation local-x axis. True if rigid, false if free.", GH_ParamAccess.item);
-            pManager.AddBooleanParameter("m_y", "m_z", "Translation local-y axis. True if rigid, false if free.", GH_ParamAccess.item);
-            pManager.AddBooleanParameter("m_z", "m_z", "Translation local-z axis. True if rigid, false if free.", GH_ParamAccess.item);
+            pManager.AddBooleanParameter("t_x", "t_x", "Translation local-x axis. True if rigid, false if free.", GH_ParamAccess.item);
+            pManager.AddBooleanParameter("t_y", "t_y", "Translation local-y axis. True if rigid, false if free.", GH_ParamAccess.item);
+            pManager.AddBooleanParameter("t_z", "t_z", "Translation local-z axis. True if rigid, false if free.", GH_ParamAccess.item);
             pManager.AddBooleanParameter("r_x", "r_x", "Rotation around local-x axis. True if rigid, false if free.", GH_ParamAccess.item);
             pManager.AddBooleanParameter("r_y", "r_y", "Rotation around local-y axis. True if rigid, false if free.", GH_ParamAccess.item);
             pManager.AddBooleanParameter("r_z", "r_z", "Rotation around local-z axis. True if rigid, false if free.", GH_ParamAccess.item);
@@ -28,16 +28,16 @@ protected override void RegisterOutputParams(GH_OutputParamManager pManager)
         protected override void SolveInstance(IGH_DataAccess DA)
         {
             // get indata
-            bool m_x = false, m_y = false, m_z = false, r_x = false, r_y = false, r_z = false;
-            if (!DA.GetData(0, ref m_x)) { return; }
-            if (!DA.GetData(1, ref m_y)) { return; }
-            if (!DA.GetData(2, ref m_z)) { return; }
+            bool t_x = false, t_y = false, t_z = false, r_x = false, r_y = false, r_z = false;
+            if (!DA.GetData(0, ref t_x)) { return; }
+            if (!DA.GetData(1, ref t_y)) { return; }
+            if (!DA.GetData(2, ref t_z)) { return; }
             if (!DA.GetData(3, ref r_x)) { return; }
             if (!DA.GetData(4, ref r_y)) { return; }
             if (!DA.GetData(5, ref r_z)) { return; }
 
             // return
-            DA.SetData(0, new FemDesign.Bars.Connectivity(m_x, m_y, m_z, r_x, r_y, r_z));
+            DA.SetData(0, new FemDesign.Bars.Connectivity(t_x, t_y, t_z, r_x, r_y, r_z));
         }
         protected override System.Drawing.Bitmap Icon
         {
diff --git a/FemDesign.Grasshopper/Bars/BarsConnectivityDefineSemiRigid.cs b/FemDesign.Grasshopper/Bars/BarsConnectivityDefineSemiRigid.cs
index 410b98d1a..0431f006f 100644
--- a/FemDesign.Grasshopper/Bars/BarsConnectivityDefineSemiRigid.cs
+++ b/FemDesign.Grasshopper/Bars/BarsConnectivityDefineSemiRigid.cs
@@ -14,11 +14,11 @@ public class BarsConnectivityDefineSemiRigid: GH_Component
         }
         protected override void RegisterInputParams(GH_InputParamManager pManager)
         {
-            pManager.AddNumberParameter("m_x", "m_x", "Release stiffness. Translation local-x axis. Optional, default value is fully rigid. [kN/m]", GH_ParamAccess.item);
+            pManager.AddNumberParameter("t_x", "t_x", "Release stiffness. Translation local-x axis. Optional, default value is fully rigid. [kN/m]", GH_ParamAccess.item);
             pManager[pManager.ParamCount -1].Optional = true;
-            pManager.AddNumberParameter("m_y", "m_z", "Release stiffness. Translation local-y axis. Optional, default value is fully rigid. [kN/m]", GH_ParamAccess.item);
+            pManager.AddNumberParameter("t_y", "t_z", "Release stiffness. Translation local-y axis. Optional, default value is fully rigid. [kN/m]", GH_ParamAccess.item);
             pManager[pManager.ParamCount -1].Optional = true;
-            pManager.AddNumberParameter("m_z", "m_z", "Release stiffness. Translation local-z axis. Optional, default value is fully rigid. [kN/m]", GH_ParamAccess.item);
+            pManager.AddNumberParameter("t_z", "t_z", "Release stiffness. Translation local-z axis. Optional, default value is fully rigid. [kN/m]", GH_ParamAccess.item);
             pManager[pManager.ParamCount -1].Optional = true;
             pManager.AddNumberParameter("r_x", "r_x", "Release stiffness. Rotation around local-x axis. Optional, default value is fully rigid. [kNm/rad]", GH_ParamAccess.item);
             pManager[pManager.ParamCount -1].Optional = true;
diff --git a/FemDesign.Grasshopper/Bars/BarsModify.cs b/FemDesign.Grasshopper/Bars/BarsModify.cs
index 0e34655f0..1a5324c38 100644
--- a/FemDesign.Grasshopper/Bars/BarsModify.cs
+++ b/FemDesign.Grasshopper/Bars/BarsModify.cs
@@ -117,8 +117,7 @@ protected override void SolveInstance(IGH_DataAccess DA)
             string identifier = null;
             if (DA.GetData(9, ref identifier))
             {
-                bar.Name = identifier;
-                bar.BarPart.Name = bar.Name;
+                bar.Identifier = identifier;
             }
 
             // output
diff --git a/FemDesign.Grasshopper/Bars/BarsTruss.cs b/FemDesign.Grasshopper/Bars/BarsTruss.cs
index 53db50274..47d6200e0 100644
--- a/FemDesign.Grasshopper/Bars/BarsTruss.cs
+++ b/FemDesign.Grasshopper/Bars/BarsTruss.cs
@@ -16,9 +16,7 @@ protected override void RegisterInputParams(GH_InputParamManager pManager)
         {
             pManager.AddCurveParameter("Line", "Line", "LineCurve", GH_ParamAccess.item);
             pManager.AddGenericParameter("Material", "Material", "Material.", GH_ParamAccess.item);
-            pManager[pManager.ParamCount - 1].Optional = true;
             pManager.AddGenericParameter("Section", "Section", "Section.", GH_ParamAccess.item);
-            pManager[pManager.ParamCount - 1].Optional = true;
             pManager.AddVectorParameter("LocalY", "LocalY", "Set local y-axis. Vector must be perpendicular to Curve mid-point local x-axis. This parameter overrides OrientLCS", GH_ParamAccess.item);
             pManager[pManager.ParamCount - 1].Optional = true;
             pManager.AddBooleanParameter("OrientLCS", "OrientLCS", "Orient LCS to GCS? If true the LCS of this object will be oriented to the GCS trying to align local z to global z if possible or align local y to global y if possible (if object is vertical). If false local y-axis from Curve coordinate system at mid-point will be used.", GH_ParamAccess.item, true);
@@ -37,16 +35,10 @@ protected override void SolveInstance(IGH_DataAccess DA)
             if (!DA.GetData(0, ref curve)) { return; }
 
             FemDesign.Materials.Material material = null;
-            if (!DA.GetData(1, ref material))
-            {
-                material = FemDesign.Materials.MaterialDatabase.GetDefault().MaterialByName("C30/37");
-            }
+            if (!DA.GetData(1, ref material)) { return; }
 
             FemDesign.Sections.Section section = null;
-            if (!DA.GetData(2, ref section))
-            {
-                section = FemDesign.Sections.SectionDatabase.GetDefault().SectionByName("Concrete sections, Rectangle, 250x600");
-            }
+            if (!DA.GetData(2, ref section)) { return; }
 
             Vector3d v = Vector3d.Zero;
             if (!DA.GetData(3, ref v))
@@ -103,7 +95,7 @@ protected override System.Drawing.Bitmap Icon
         }
         public override Guid ComponentGuid
         {
-            get { return new Guid("bfc07633-529a-4a98-a45b-ce657e916f83"); }
+            get { return new Guid("{EC481150-B491-406E-8549-92625E18FBEC}"); }
         }
         public override GH_Exposure Exposure => GH_Exposure.primary;
 
diff --git a/FemDesign.Grasshopper/Bars/BarsTrussLimitedCapacity.cs b/FemDesign.Grasshopper/Bars/BarsTrussLimitedCapacity.cs
index da0ea5c29..2c50279de 100644
--- a/FemDesign.Grasshopper/Bars/BarsTrussLimitedCapacity.cs
+++ b/FemDesign.Grasshopper/Bars/BarsTrussLimitedCapacity.cs
@@ -82,7 +82,7 @@ protected override void SolveInstance(IGH_DataAccess DA)
             FemDesign.Geometry.Edge edge = Convert.FromRhinoLineCurve((LineCurve)curve);
 
             // bar
-            FemDesign.Bars.Bar bar = new FemDesign.Bars.Bar(edge, material, section, identifier: identifier);
+            FemDesign.Bars.Bar bar = Bars.Bar.Truss(edge, material, section, identifier);
             bar.MaxCompression = maxCompression;
             bar.MaxTension = maxTension;
             bar.CompressionPlasticity = compressionPlasticity;
diff --git a/FemDesign.Grasshopper/Bars/OBSOLETE/BarsBeam_OBSOLETE.cs b/FemDesign.Grasshopper/Bars/OBSOLETE/BarsBeam_OBSOLETE.cs
new file mode 100644
index 000000000..cca0bbbb4
--- /dev/null
+++ b/FemDesign.Grasshopper/Bars/OBSOLETE/BarsBeam_OBSOLETE.cs
@@ -0,0 +1,130 @@
+// https://strusoft.com/
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Grasshopper.Kernel;
+using Rhino.Geometry;
+
+namespace FemDesign.Grasshopper
+{
+    public class BarsBeam_OBSOLETE : GH_Component
+    {
+        public BarsBeam_OBSOLETE() : base("Bars.Beam", "Beam", "Create a bar element of type beam.",
+            CategoryName.Name(),
+            SubCategoryName.Cat2a())
+        {
+
+        }
+        protected override void RegisterInputParams(GH_InputParamManager pManager)
+        {
+            pManager.AddCurveParameter("Curve", "Curve", "LineCurve or ArcCurve", GH_ParamAccess.item);
+            pManager.AddGenericParameter("Material", "Material", "Material.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddGenericParameter("Section", "Section", "Section. If 1 item this item defines both start and end. If two items the first item defines the start and the last item defines the end.", GH_ParamAccess.list);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddGenericParameter("Connectivity", "Connectivity", "Connectivity. If 1 item this item defines both start and end. If two items the first item defines the start and the last item defines the end. Optional, default value if undefined.", GH_ParamAccess.list);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddGenericParameter("Eccentricity", "Eccentricity", "Eccentricity. If 1 item this item defines both start and end. If two items the first item defines the start and the last item defines the end. Optional, default value if undefined.", GH_ParamAccess.list);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddVectorParameter("LocalY", "LocalY", "Set local y-axis. Vector must be perpendicular to Curve mid-point local x-axis. This parameter overrides OrientLCS", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddBooleanParameter("OrientLCS", "OrientLCS", "Orient LCS to GCS? If true the LCS of this object will be oriented to the GCS trying to align local z to global z if possible or align local y to global y if possible (if object is vertical). If false local y-axis from Curve coordinate system at mid-point will be used.", GH_ParamAccess.item, true);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddTextParameter("Identifier", "Identifier", "Identifier. Optional, default value if undefined.", GH_ParamAccess.item, "B");
+            pManager[pManager.ParamCount - 1].Optional = true;
+        }
+        protected override void RegisterOutputParams(GH_OutputParamManager pManager)
+        {
+            pManager.AddGenericParameter("Bar", "Bar", "Bar.", GH_ParamAccess.item);
+        }
+        protected override void SolveInstance(IGH_DataAccess DA)
+        {
+            // get input
+            Curve curve = null;
+            if (!DA.GetData(0, ref curve)) { return; }
+
+            FemDesign.Materials.Material material = null;
+            if (!DA.GetData(1, ref material))
+            {
+                material = FemDesign.Materials.MaterialDatabase.GetDefault().MaterialByName("C30/37");
+            }
+
+            List<FemDesign.Sections.Section> sections = new List<Sections.Section>();
+            if (!DA.GetDataList(2, sections))
+            {
+                sections = new List<Sections.Section>();
+                sections.Add(FemDesign.Sections.SectionDatabase.GetDefault().SectionByName("Concrete sections, Rectangle, 250x600"));
+            }
+
+            List<FemDesign.Bars.Connectivity> connectivities = new List<Bars.Connectivity>();
+            if (!DA.GetDataList(3, connectivities))
+            {
+                connectivities = new List<Bars.Connectivity> { FemDesign.Bars.Connectivity.Rigid };
+            }
+
+            List<FemDesign.Bars.Eccentricity> eccentricities = new List<Bars.Eccentricity>();
+            if (!DA.GetDataList(4, eccentricities))
+            {
+                eccentricities = new List<Bars.Eccentricity> { FemDesign.Bars.Eccentricity.Default };
+            }
+
+            Vector3d v = Vector3d.Zero;
+            if (!DA.GetData(5, ref v))
+            {
+                // pass
+            }
+
+            bool orientLCS = true;
+            if (!DA.GetData(6, ref orientLCS))
+            {
+                // pass
+            }
+
+            string identifier = "B";
+            if (!DA.GetData(7, ref identifier))
+            {
+                // pass
+            }
+
+
+            // convert geometry
+            FemDesign.Geometry.Edge edge = Convert.FromRhinoLineOrArc2(curve);
+
+            // create bar
+            var type = FemDesign.Bars.BarType.Beam;
+            FemDesign.Bars.Bar bar = new FemDesign.Bars.Bar(edge, type, material, sections.ToArray(), eccentricities.ToArray(), connectivities.ToArray(), identifier);
+
+            // set local y-axis
+            if (!v.Equals(Vector3d.Zero))
+            {
+                bar.BarPart.LocalY = v.FromRhino();
+            }
+
+            // else orient coordinate system to GCS
+            else
+            {
+                if (orientLCS)
+                {
+                    bar.BarPart.OrientCoordinateSystemToGCS();
+                }
+            }
+
+            // output
+            DA.SetData(0, bar);
+
+        }
+        protected override System.Drawing.Bitmap Icon
+        {
+            get
+            {
+                return FemDesign.Properties.Resources.BeamDefine;
+            }
+        }
+        public override Guid ComponentGuid
+        {
+            get { return new Guid("135b6331-bf19-4d89-9e81-9e5e0d137f67"); }
+        }
+        public override GH_Exposure Exposure => GH_Exposure.hidden;
+
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Grasshopper/Bars/OBSOLETE/BarsColumn_OBSOLETE.cs b/FemDesign.Grasshopper/Bars/OBSOLETE/BarsColumn_OBSOLETE.cs
new file mode 100644
index 000000000..7b36e49ff
--- /dev/null
+++ b/FemDesign.Grasshopper/Bars/OBSOLETE/BarsColumn_OBSOLETE.cs
@@ -0,0 +1,131 @@
+// https://strusoft.com/
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Grasshopper.Kernel;
+using Rhino.Geometry;
+
+namespace FemDesign.Grasshopper
+{
+    public class BarsColumn_OBSOLETE: GH_Component
+    {
+       public BarsColumn_OBSOLETE(): base("Bars.Column", "Column", "Create a bar element of type column.", CategoryName.Name(),
+            SubCategoryName.Cat2a())
+        {
+
+       }
+       protected override void RegisterInputParams(GH_InputParamManager pManager)
+       {
+           pManager.AddCurveParameter("Line", "Line", "Line. Local x of line must equal positive global Z.", GH_ParamAccess.item);
+           pManager.AddGenericParameter("Material", "Material", "Material.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddGenericParameter("Section", "Section", "Section. If 1 item this item defines both start and end. If two items the first item defines the start and the last item defines the end.", GH_ParamAccess.list);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddGenericParameter("Connectivity", "Connectivity", "Connectivity. If 1 item this item defines both start and end. If two items the first item defines the start and the last item defines the end. Optional, default value if undefined.", GH_ParamAccess.list);
+           pManager[pManager.ParamCount - 1].Optional = true;
+           pManager.AddGenericParameter("Eccentricity", "Eccentricity", "Eccentricity. If 1 item this item defines both start and end. If two items the first item defines the start and the last item defines the end. Optional, default value if undefined.", GH_ParamAccess.list);
+           pManager[pManager.ParamCount - 1].Optional = true;
+           pManager.AddVectorParameter("LocalY", "LocalY", "Set local y-axis. Vector must be perpendicular to Curve mid-point local x-axis. This parameter overrides OrientLCS", GH_ParamAccess.item);
+           pManager[pManager.ParamCount - 1].Optional = true;
+           pManager.AddBooleanParameter("OrientLCS", "OrientLCS", "Orient LCS to GCS? If true the LCS of this object will be oriented to the GCS trying to align local z to global z if possible or align local y to global y if possible (if object is vertical). If false local y-axis from Curve coordinate system at mid-point will be used.", GH_ParamAccess.item, true);
+           pManager.AddTextParameter("Identifier", "Identifier", "Identifier. Optional, default value if undefined.", GH_ParamAccess.item, "C");
+           pManager[pManager.ParamCount - 1].Optional = true;
+       } 
+       protected override void RegisterOutputParams(GH_OutputParamManager pManager)
+       {
+           pManager.AddGenericParameter("Bar", "Bar", "Bar.", GH_ParamAccess.item);
+       }
+       protected override void SolveInstance(IGH_DataAccess DA)
+       {
+            // get input            
+            Curve curve = null;
+            if (!DA.GetData(0, ref curve)) { return; }
+
+            FemDesign.Materials.Material material = null;
+            if (!DA.GetData(1, ref material))
+            {
+                material = FemDesign.Materials.MaterialDatabase.GetDefault().MaterialByName("C30/37");
+            }
+
+            List<FemDesign.Sections.Section> sections = new List<Sections.Section>();
+            if (!DA.GetDataList(2, sections))
+            {
+                sections = new List<Sections.Section>();
+                sections.Add(FemDesign.Sections.SectionDatabase.GetDefault().SectionByName("Concrete sections, Rectangle, 250x600"));
+            }
+
+            List<FemDesign.Bars.Connectivity> connectivities = new List<Bars.Connectivity>();
+            if (!DA.GetDataList(3, connectivities))
+            {
+                connectivities = new List<Bars.Connectivity>{FemDesign.Bars.Connectivity.Rigid};
+            }
+
+            List<FemDesign.Bars.Eccentricity> eccentricities = new List<Bars.Eccentricity>();
+            if (!DA.GetDataList(4, eccentricities))
+            {
+                eccentricities = new List<Bars.Eccentricity>{FemDesign.Bars.Eccentricity.Default};
+            }
+
+            Vector3d v = Vector3d.Zero;
+            if (!DA.GetData(5, ref v))
+            {
+                // pass
+            }
+
+            bool orientLCS = true;
+            if (!DA.GetData(6, ref orientLCS))
+            {
+                // pass
+            }
+
+            string identifier = "C";
+            if (!DA.GetData(7, ref identifier))
+            {
+                // pass
+            }
+
+            // convert geometry
+            if (curve.GetType() != typeof(LineCurve))
+            {
+                throw new System.ArgumentException("Curve must be a LineCurve");
+            }
+            FemDesign.Geometry.Edge edge = Convert.FromRhinoLineCurve((LineCurve)curve);
+
+            // create bar
+             var type = FemDesign.Bars.BarType.Column;
+            FemDesign.Bars.Bar bar = new FemDesign.Bars.Bar(edge, type, material, sections.ToArray(), eccentricities.ToArray(), connectivities.ToArray(), identifier);
+            
+            // set local y-axis
+            if (!v.Equals(Vector3d.Zero))
+            {
+                bar.BarPart.LocalY = v.FromRhino();
+            }
+
+            // else orient coordinate system to GCS
+            else
+            {
+                if (orientLCS)
+                {  
+                    bar.BarPart.OrientCoordinateSystemToGCS();
+                }
+            }
+            
+            // output
+            DA.SetData(0, bar);
+
+       }
+       protected override System.Drawing.Bitmap Icon
+       {
+           get
+           {
+                return FemDesign.Properties.Resources.ColumnDefine;
+           }
+       }
+       public override Guid ComponentGuid
+       {
+           get { return new Guid("3105b98e-ed85-46f4-9295-ed1d0d1af432"); }
+       }
+
+        public override GH_Exposure Exposure => GH_Exposure.hidden;
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Grasshopper/Bars/OBSOLETE/BarsTruss_OBSOLETE.cs b/FemDesign.Grasshopper/Bars/OBSOLETE/BarsTruss_OBSOLETE.cs
new file mode 100644
index 000000000..1193f3844
--- /dev/null
+++ b/FemDesign.Grasshopper/Bars/OBSOLETE/BarsTruss_OBSOLETE.cs
@@ -0,0 +1,111 @@
+// https://strusoft.com/
+using System;
+using Grasshopper.Kernel;
+using Rhino.Geometry;
+
+namespace FemDesign.Grasshopper
+{
+    public class BarsTruss_OBSOLETE: GH_Component
+    {
+        public BarsTruss_OBSOLETE(): base("Bars.Truss", "Truss", "Create a bar element of type truss.", CategoryName.Name(),
+            SubCategoryName.Cat2a())
+        {
+
+        }
+        protected override void RegisterInputParams(GH_InputParamManager pManager)
+        {
+            pManager.AddCurveParameter("Line", "Line", "LineCurve", GH_ParamAccess.item);
+            pManager.AddGenericParameter("Material", "Material", "Material.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddGenericParameter("Section", "Section", "Section.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddVectorParameter("LocalY", "LocalY", "Set local y-axis. Vector must be perpendicular to Curve mid-point local x-axis. This parameter overrides OrientLCS", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddBooleanParameter("OrientLCS", "OrientLCS", "Orient LCS to GCS? If true the LCS of this object will be oriented to the GCS trying to align local z to global z if possible or align local y to global y if possible (if object is vertical). If false local y-axis from Curve coordinate system at mid-point will be used.", GH_ParamAccess.item, true);
+            pManager.AddTextParameter("Identifier", "Identifier", "Identifier. Optional, default value if undefined.", GH_ParamAccess.item, "T");
+            pManager[pManager.ParamCount - 1].Optional = true;
+        }
+        protected override void RegisterOutputParams(GH_OutputParamManager pManager)
+        {
+            pManager.AddGenericParameter("Bar", "Bar", "Bar.", GH_ParamAccess.item);
+        }
+        protected override void SolveInstance(IGH_DataAccess DA)
+        {
+            // get input
+            
+            Curve curve = null;
+            if (!DA.GetData(0, ref curve)) { return; }
+
+            FemDesign.Materials.Material material = null;
+            if (!DA.GetData(1, ref material))
+            {
+                material = FemDesign.Materials.MaterialDatabase.GetDefault().MaterialByName("C30/37");
+            }
+
+            FemDesign.Sections.Section section = null;
+            if (!DA.GetData(2, ref section))
+            {
+                section = FemDesign.Sections.SectionDatabase.GetDefault().SectionByName("Concrete sections, Rectangle, 250x600");
+            }
+
+            Vector3d v = Vector3d.Zero;
+            if (!DA.GetData(3, ref v))
+            {
+                // pass
+            }
+
+            bool orientLCS = true;
+            if (!DA.GetData(4, ref orientLCS))
+            {
+                // pass
+            }
+
+            string identifier = "T";
+            if (!DA.GetData(5, ref identifier))
+            {
+                // pass
+            }
+
+            // convert geometry
+            if (curve.GetType() != typeof(LineCurve))
+            {
+                throw new System.ArgumentException("Curve must be a LineCurve");
+            }
+            FemDesign.Geometry.Edge edge = Convert.FromRhinoLineCurve((LineCurve)curve);
+
+            // bar
+            FemDesign.Bars.Bar bar = new Bars.Truss(edge, material, section, identifier);
+
+            // set local y-axis
+            if (!v.Equals(Vector3d.Zero))
+            {
+                bar.BarPart.LocalY = v.FromRhino();
+            }
+
+            // else orient coordinate system to GCS
+            else
+            {
+                if (orientLCS)
+                {
+                    bar.BarPart.OrientCoordinateSystemToGCS();
+                }
+            }
+
+            // return
+            DA.SetData(0, bar);
+        }
+        protected override System.Drawing.Bitmap Icon
+        {
+            get
+            {
+                return FemDesign.Properties.Resources.TrussDefine;
+            }
+        }
+        public override Guid ComponentGuid
+        {
+            get { return new Guid("bfc07633-529a-4a98-a45b-ce657e916f83"); }
+        }
+        public override GH_Exposure Exposure => GH_Exposure.hidden;
+
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Grasshopper/Calculate/ApplicationRunAnalysis.cs b/FemDesign.Grasshopper/Calculate/ApplicationRunAnalysis.cs
index a6fff2899..d6659d023 100644
--- a/FemDesign.Grasshopper/Calculate/ApplicationRunAnalysis.cs
+++ b/FemDesign.Grasshopper/Calculate/ApplicationRunAnalysis.cs
@@ -17,7 +17,7 @@ public ModelRunAnalysis() : base("Application.RunAnalysis", "RunAnalysis", "Run
         protected override void RegisterInputParams(GH_InputParamManager pManager)
         {
             pManager.AddGenericParameter("FdModel", "FdModel", "FdModel to open.", GH_ParamAccess.item);
-            pManager.AddTextParameter("FilePathStruxml", "FilePathStruxml", "File path where to save the model as .struxml.\nIf not specified, the file will be saved using the name and location folder of your .gh script.", GH_ParamAccess.item);
+            pManager.AddTextParameter("FilePathStruxml", "FilePath", "File path where to save the model as .struxml.\nIf not specified, the file will be saved using the name and location folder of your .gh script.", GH_ParamAccess.item);
             pManager[pManager.ParamCount - 1].Optional = true;
             pManager.AddGenericParameter("Analysis", "Analysis", "Analysis.", GH_ParamAccess.item);
             pManager.AddTextParameter("ResultTypes", "ResultTypes", "Results to be extracted from model. This might require the model to have been analysed. Item or list.", GH_ParamAccess.list);
diff --git a/FemDesign.Grasshopper/ConstructionStages/ActivatedLoadCase.cs b/FemDesign.Grasshopper/ConstructionStages/ActivatedLoadCase.cs
index f28424816..a9b62b50c 100644
--- a/FemDesign.Grasshopper/ConstructionStages/ActivatedLoadCase.cs
+++ b/FemDesign.Grasshopper/ConstructionStages/ActivatedLoadCase.cs
@@ -4,6 +4,10 @@
 using Grasshopper.Kernel;
 using Rhino.Geometry;
 using FemDesign.Loads;
+using System.Linq;
+using Grasshopper.Kernel.Special;
+
+using FemDesign.Grasshopper.Extension.ComponentExtension;
 
 namespace FemDesign.Grasshopper
 {
@@ -19,7 +23,7 @@ protected override void RegisterInputParams(GH_InputParamManager pManager)
             pManager.AddGenericParameter("LoadCase", "LoadCase", "LoadCase to be activated.\n\nLoadCase may also be \"PTC T0\" or \"PTC T8\" to activate a PTC load", GH_ParamAccess.item);
             pManager.AddNumberParameter("Factor", "Factor", "Factor", GH_ParamAccess.item, 1.0);
             pManager[pManager.ParamCount - 1].Optional = true;
-            pManager.AddIntegerParameter("Partitioning", "Partitioning", "0 - only_in_this_stage\n1 - from_this_stage_on\n2 - shifted_from_first_stage\n3 - only_stage_activated_elem.\nDefault: from_this_stage_on.", GH_ParamAccess.item, 1);
+            pManager.AddTextParameter("Partitioning", "Partitioning", "Connect 'ValueList' to get the options.\n0 - only_in_this_stage\n1 - from_this_stage_on\n2 - shifted_from_first_stage\n3 - only_stage_activated_elem.\nDefault: from_this_stage_on.", GH_ParamAccess.item, "from_this_stage_on");
             pManager[pManager.ParamCount - 1].Optional = true;
         }
         protected override void RegisterOutputParams(GH_OutputParamManager pManager)
@@ -39,14 +43,10 @@ protected override void SolveInstance(IGH_DataAccess DA)
             double factor = 1;
             DA.GetData(1, ref factor);
 
-            int partitioning = 1;
-            ActivationType type = (ActivationType)partitioning; //from_this_stage_on
+            string partitioning = "1";
             DA.GetData(2, ref partitioning);
 
-            if (Enum.IsDefined(typeof(ActivationType), partitioning))
-            {
-                type = (ActivationType)partitioning;
-            }
+            ActivationType type = FemDesign.GenericClasses.EnumParser.Parse<ActivationType>(partitioning);
 
             FemDesign.ActivatedLoadCase activatedLoadCase;
             if (isLoadCase)
@@ -61,6 +61,13 @@ protected override void SolveInstance(IGH_DataAccess DA)
             DA.SetData(0, activatedLoadCase);
         }
 
+        protected override void BeforeSolveInstance()
+        {
+            var resultTypes = Enum.GetNames(typeof(ActivationType)).ToList();
+            ValueListUtils.updateValueLists(this, 2, resultTypes, null);
+
+        }
+
         protected override System.Drawing.Bitmap Icon
         {
             get
diff --git a/FemDesign.Grasshopper/ConstructionStages/Stage.cs b/FemDesign.Grasshopper/ConstructionStages/Stage.cs
index 8f0f1f21b..11d6db5ef 100644
--- a/FemDesign.Grasshopper/ConstructionStages/Stage.cs
+++ b/FemDesign.Grasshopper/ConstructionStages/Stage.cs
@@ -9,9 +9,9 @@
 
 namespace FemDesign.Grasshopper
 {
-    public class Stage : GH_Component
+    public class StageComponent : GH_Component
     {
-        public Stage() : base("Stage", "Stage", "Creates a construction stage.", CategoryName.Name(),
+        public StageComponent() : base("Stage", "Stage", "Creates a construction stage.", CategoryName.Name(),
             SubCategoryName.Cat7a())
         {
 
@@ -30,7 +30,7 @@ protected override void RegisterInputParams(GH_InputParamManager pManager)
         }
         protected override void RegisterOutputParams(GH_OutputParamManager pManager)
         {
-            pManager.AddGenericParameter("Stages", "Stages", "", GH_ParamAccess.item);
+            pManager.AddGenericParameter("Stage", "Stage", "", GH_ParamAccess.item);
         }
         protected override void SolveInstance(IGH_DataAccess DA)
         {
diff --git a/FemDesign.Grasshopper/Deconstruct/LineStressLoadDeconstruct.cs b/FemDesign.Grasshopper/Deconstruct/LineStressLoadDeconstruct.cs
new file mode 100644
index 000000000..4be0755db
--- /dev/null
+++ b/FemDesign.Grasshopper/Deconstruct/LineStressLoadDeconstruct.cs
@@ -0,0 +1,57 @@
+// https://strusoft.com/
+using System;
+using Grasshopper.Kernel;
+
+namespace FemDesign.Grasshopper
+{
+    public class LineStressLoadDeconstruct : GH_Component
+    {
+        public LineStressLoadDeconstruct() : base("LineStressLoad.Deconstruct", "Deconstruct", "Deconstruct a LineStressLoad.", "FEM-Design", "Deconstruct")
+        {
+
+        }
+        protected override void RegisterInputParams(GH_InputParamManager pManager)
+        {
+            pManager.AddGenericParameter("LineStressLoad", "LineStressLoad", "Line stress load. Use SortLoads to extract LineStressLoads.", GH_ParamAccess.item);
+        }
+        protected override void RegisterOutputParams(GH_OutputParamManager pManager)
+        {
+            pManager.AddTextParameter("Guid", "Guid", "Guid.", GH_ParamAccess.item);
+            pManager.AddCurveParameter("Curve", "Curve", "Curve.", GH_ParamAccess.item);
+            pManager.AddVectorParameter("Direction", "Direction", "Direction.", GH_ParamAccess.item);
+            pManager.AddNumberParameter("n1", "n1", "Force at start.", GH_ParamAccess.item);
+            pManager.AddNumberParameter("n2", "n2", "Force at end.", GH_ParamAccess.item);
+            pManager.AddNumberParameter("m1", "m1", "Moment at start.", GH_ParamAccess.item);
+            pManager.AddNumberParameter("m2", "m2", "Moment at end.", GH_ParamAccess.item);
+            pManager.AddTextParameter("LoadCaseGuid", "LoadCaseGuid", "LoadCase guid reference.", GH_ParamAccess.item);
+            pManager.AddTextParameter("Comment", "Comment", "Comment.", GH_ParamAccess.item);
+        }
+        protected override void SolveInstance(IGH_DataAccess DA)
+        {
+            // get input
+            FemDesign.Loads.LineStressLoad stressLoad = null;
+            if (!DA.GetData(0, ref stressLoad))
+            {
+                return;
+            }
+            if (stressLoad == null)
+            {
+                return;
+            }
+
+            DA.SetData("Guid", stressLoad.LoadCaseGuid);
+            DA.SetData("Curve", stressLoad.Edge.ToRhino());
+            DA.SetData("Direction", stressLoad.Direction.ToRhino());
+            DA.SetData("n1", stressLoad.TopBotLocVal[0].TopVal);
+            DA.SetData("m1", stressLoad.TopBotLocVal[0].BottomVal);
+            DA.SetData("n2", stressLoad.TopBotLocVal[1].TopVal);
+            DA.SetData("m2", stressLoad.TopBotLocVal[1].BottomVal);
+            DA.SetData("LoadCaseGuid", stressLoad.LoadCaseGuid);
+            DA.SetData("Comment", stressLoad.Comment);
+        }
+        protected override System.Drawing.Bitmap Icon => FemDesign.Properties.Resources.LineStressLoadDeconstruct;
+        public override Guid ComponentGuid => new Guid("6b4b792a-a7cc-44de-af6a-5e30a9429fa1");
+        public override GH_Exposure Exposure => GH_Exposure.quarternary;
+
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Grasshopper/Deconstruct/LoadCombinationDeconstruct.cs b/FemDesign.Grasshopper/Deconstruct/LoadCombinationDeconstruct.cs
index b1fe2f47b..7d725dc45 100644
--- a/FemDesign.Grasshopper/Deconstruct/LoadCombinationDeconstruct.cs
+++ b/FemDesign.Grasshopper/Deconstruct/LoadCombinationDeconstruct.cs
@@ -1,30 +1,32 @@
 // https://strusoft.com/
 using System;
+using System.Linq;
 using System.Collections.Generic;
 using Grasshopper.Kernel;
 
 namespace FemDesign.Grasshopper
 {
-    public class LoadCombinationDeconstruct: GH_Component
+    public class LoadCombinationDeconstruct : GH_Component
     {
-       public LoadCombinationDeconstruct(): base("LoadCombination.Deconstruct", "Deconstruct", "Deconstruct a LoadCombination.", "FEM-Design", "Deconstruct")
-       {
+        public LoadCombinationDeconstruct() : base("LoadCombination.Deconstruct", "Deconstruct", "Deconstruct a LoadCombination.", "FEM-Design", "Deconstruct")
+        {
 
-       }
-       protected override void RegisterInputParams(GH_InputParamManager pManager)
-       {
-           pManager.AddGenericParameter("LoadCombination", "LoadCombination", "LoadCombination.", GH_ParamAccess.item);           
-       } 
-       protected override void RegisterOutputParams(GH_OutputParamManager pManager)
-       {
-           pManager.AddTextParameter("Guid", "Guid", "Guid.", GH_ParamAccess.list);
-           pManager.AddTextParameter("Name", "Name", "Name.", GH_ParamAccess.list);
-           pManager.AddTextParameter("Type", "Type", "Type." , GH_ParamAccess.list);
-           pManager.AddTextParameter("LoadCases", "LoadCases", "LoadCases.", GH_ParamAccess.list);
-           pManager.AddNumberParameter("Gammas", "Gammas", "Gammas.", GH_ParamAccess.list);
-       }
-       protected override void SolveInstance(IGH_DataAccess DA)
-       {
+        }
+        protected override void RegisterInputParams(GH_InputParamManager pManager)
+        {
+            pManager.AddGenericParameter("LoadCombination", "LoadCombination", "LoadCombination.", GH_ParamAccess.item);
+        }
+        protected override void RegisterOutputParams(GH_OutputParamManager pManager)
+        {
+            pManager.AddTextParameter("Guid", "Guid", "Guid.", GH_ParamAccess.list);
+            pManager.AddTextParameter("Name", "Name", "Name.", GH_ParamAccess.list);
+            pManager.AddTextParameter("Type", "Type", "Type.", GH_ParamAccess.list);
+            pManager.AddGenericParameter("LoadCases", "LoadCases", "LoadCases. Note that load cases may also include a single construction stage and any single of the special load cases such as seisemic, PTC or Neg. shaft friction load case.", GH_ParamAccess.list);
+            pManager.AddNumberParameter("Gammas", "Gammas", "Gammas.", GH_ParamAccess.list);
+            pManager.AddTextParameter("LoadCaseTypes", "LoadCaseTypes", "Load case types. One of 'Load case', 'stage' or 'Special load case'.", GH_ParamAccess.list);
+        }
+        protected override void SolveInstance(IGH_DataAccess DA)
+        {
             // get input
             FemDesign.Loads.LoadCombination obj = null;
             if (!DA.GetData(0, ref obj))
@@ -39,33 +41,26 @@ protected override void SolveInstance(IGH_DataAccess DA)
             // The following code is to convert 'item' to 'list object'
             // It is required to construct the Load Combination without graftening the data
 
-            var guidList = new List<object> { obj.Guid }; 
+            var guidList = new List<object> { obj.Guid };
 
-            var nameList = new List<object> { obj.Name }; 
+            var nameList = new List<object> { obj.Name };
 
-            var objectTypeList = new List<object> { obj.Type.ToString() }; 
+            var objectTypeList = new List<object> { obj.Type.ToString() };
 
+            var pairs = obj.GetCaseAndGammas();
+
+            // TODO: Remove when Moving load load cases is implemented
+            pairs = pairs.Where(p => p.CaseType != "Moving load case").ToList();
 
-            // return
             DA.SetDataList(0, guidList);
             DA.SetDataList(1, nameList);
             DA.SetDataList(2, objectTypeList);
-            DA.SetDataList(3, obj.GetLoadCaseGuidsAsString());
-            DA.SetDataList(4, obj.GetGammas());
-            
-       }
-       protected override System.Drawing.Bitmap Icon
-       {
-           get
-           {
-                return FemDesign.Properties.Resources.LoadCombinationDeconstruct;
-           }
-       }
-       public override Guid ComponentGuid
-       {
-           get { return new Guid("c1cf57c6-be8c-42a8-a489-4145c2d88896"); }
-       }
-
+            DA.SetDataList(3, pairs.Select(p => p.Case));
+            DA.SetDataList(4, pairs.Select(p => p.Gamma));
+            DA.SetDataList(5, pairs.Select(p => p.CaseType));
+        }
+        protected override System.Drawing.Bitmap Icon => FemDesign.Properties.Resources.LoadCombinationDeconstruct;
+        public override Guid ComponentGuid => new Guid("21050992-3259-4a57-a7a6-77b7566e0603");
         public override GH_Exposure Exposure => GH_Exposure.quarternary;
 
     }
diff --git a/FemDesign.Grasshopper/Deconstruct/StagesDeconstruct.cs b/FemDesign.Grasshopper/Deconstruct/StagesDeconstruct.cs
index 4cef5afcc..0c109084b 100644
--- a/FemDesign.Grasshopper/Deconstruct/StagesDeconstruct.cs
+++ b/FemDesign.Grasshopper/Deconstruct/StagesDeconstruct.cs
@@ -17,11 +17,11 @@ protected override void RegisterInputParams(GH_InputParamManager pManager)
         }
         protected override void RegisterOutputParams(GH_OutputParamManager pManager)
         {
-            pManager.AddIntegerParameter("Id", "Id", "Stage id", GH_ParamAccess.item);
-            pManager.AddGenericParameter("Elements", "Elements", "", GH_ParamAccess.list);
+            pManager.AddIntegerParameter("Index", "Index", "Stage id", GH_ParamAccess.item);
             pManager.AddTextParameter("Description", "Description", "", GH_ParamAccess.item);
-            pManager.AddBooleanParameter("InitialStressState", "InitialState", "", GH_ParamAccess.item);
+            pManager.AddGenericParameter("Elements", "Elements", "", GH_ParamAccess.list);
             pManager.AddGenericParameter("ActivatedLoadCases", "ActivatedLoadCases", "", GH_ParamAccess.list);
+            pManager.AddBooleanParameter("InitialStressState", "InitialState", "", GH_ParamAccess.item);
         }
         protected override void SolveInstance(IGH_DataAccess DA)
         {
@@ -35,17 +35,17 @@ protected override void SolveInstance(IGH_DataAccess DA)
             var activeLoadCases = stage.ActivatedLoadCases;
 
             DA.SetData(0, id);
-            DA.SetDataList(1, elements);
-            DA.SetData(2, description);
-            DA.SetData(3, initialStressState);
-            DA.SetDataList(4, activeLoadCases);
+            DA.SetData(1, description);
+            DA.SetDataList(2, elements);
+            DA.SetDataList(3, activeLoadCases);
+            DA.SetData(4, initialStressState);
 
         }
         protected override System.Drawing.Bitmap Icon
         {
             get
             {
-                return null;
+                return FemDesign.Properties.Resources.StagesDeconstruct;
             }
         }
         public override Guid ComponentGuid
diff --git a/FemDesign.Grasshopper/Deconstruct/SupportDeconstuctor.cs b/FemDesign.Grasshopper/Deconstruct/SupportDeconstuctor.cs
index b92839f4a..600bd23a0 100644
--- a/FemDesign.Grasshopper/Deconstruct/SupportDeconstuctor.cs
+++ b/FemDesign.Grasshopper/Deconstruct/SupportDeconstuctor.cs
@@ -20,8 +20,8 @@ protected override void RegisterOutputParams(GH_OutputParamManager pManager)
             pManager.AddTextParameter("AnalyticalID", "AnalyticalID", "Analytical ID.", GH_ParamAccess.item);
             pManager.AddGenericParameter("Geometry", "Geometry", "Geometry. [m]", GH_ParamAccess.item);
             pManager.AddGenericParameter("MovingLocal", "MovingLocal", "MovingLocal.", GH_ParamAccess.item);
-            pManager.AddVectorParameter("LocalX", "LocalX", "LocalX.", GH_ParamAccess.item);
-            pManager.AddVectorParameter("LocalY", "LocalY", "LocalY.", GH_ParamAccess.item);
+            pManager.AddVectorParameter("GroupLocalX", "GroupLocalX", "The value refer to Group LocalX and NOT the local coordinate system of the underlying geometry.", GH_ParamAccess.item);
+            pManager.AddVectorParameter("GroupLocalY", "GroupLocalY", "The value refer to Group LocalY and NOT the local coordinate system of the underlying geometry.", GH_ParamAccess.item);
             pManager.AddGenericParameter("Motions", "Motions", "Motions.", GH_ParamAccess.item);
             pManager.AddGenericParameter("Rotations", "Rotations", "Rotations.", GH_ParamAccess.item);
             pManager.AddGenericParameter("Plastic Limits Forces Motions", "PlaLimMotions", "Plastic limits forces for motion springs.", GH_ParamAccess.item);
diff --git a/FemDesign.Grasshopper/FemDesign.Grasshopper.csproj b/FemDesign.Grasshopper/FemDesign.Grasshopper.csproj
index 3832afdb3..5c7c34cd9 100644
--- a/FemDesign.Grasshopper/FemDesign.Grasshopper.csproj
+++ b/FemDesign.Grasshopper/FemDesign.Grasshopper.csproj
@@ -74,8 +74,11 @@
     <Compile Include="AdvancedFem\Obsolete\CoverTwoWayOBSOLETE.cs" />
     <Compile Include="AdvancedFem\CoverTwoWay.cs" />
     <Compile Include="Bars\BarsBeam.cs" />
-    <Compile Include="Bars\BarsBeamSimple.cs" />
     <Compile Include="Bars\BarsColumn.cs" />
+    <Compile Include="Bars\BarsTruss.cs" />
+    <Compile Include="Bars\OBSOLETE\BarsBeam_OBSOLETE.cs" />
+    <Compile Include="Bars\BarsBeamSimple.cs" />
+    <Compile Include="Bars\OBSOLETE\BarsColumn_OBSOLETE.cs" />
     <Compile Include="Bars\BarsColumnSimple.cs" />
     <Compile Include="Bars\BarsConnectivityConstruct.cs" />
     <Compile Include="Bars\BarsConnectivityDefineSemiRigid.cs" />
@@ -83,7 +86,7 @@
     <Compile Include="Bars\BarsConnectivityRigid.cs" />
     <Compile Include="Bars\BarsEccentricityConstruct.cs" />
     <Compile Include="Bars\BarsModify.cs" />
-    <Compile Include="Bars\BarsTruss.cs" />
+    <Compile Include="Bars\OBSOLETE\BarsTruss_OBSOLETE.cs" />
     <Compile Include="Bars\BarsTrussLimitedCapacity.cs" />
     <Compile Include="Bars\Buckling\BucklingDataSetOnConcreteBar.cs" />
     <Compile Include="Bars\Buckling\BucklingDataSetOnSteelBar.cs" />
@@ -104,6 +107,7 @@
     <Compile Include="ConstructionStages\ActivatedLoadCase.cs" />
     <Compile Include="ConstructionStages\Stage.cs" />
     <Compile Include="Deconstruct\EdgeConnectionDeconstruct.cs" />
+    <Compile Include="Deconstruct\LineStressLoadDeconstruct.cs" />
     <Compile Include="Deconstruct\LoadCategoryDeconstruct.cs" />
     <Compile Include="Deconstruct\LoadGroupDeconstruct.cs" />
     <Compile Include="Deconstruct\ModelDeconstrut.cs" />
@@ -112,6 +116,7 @@
     <Compile Include="Extension\ComponentExtensions.cs" />
     <Compile Include="Geometry\GeomUtility.cs" />
     <Compile Include="Helpers\_GhRibbonLayout.cs" />
+    <Compile Include="Loads\LineStressLoadDefine.cs" />
     <Compile Include="Loads\LineLoadForce.cs" />
     <Compile Include="Loads\LineLoadMoment.cs" />
     <Compile Include="Loads\LoadCategoryConstruct.cs" />
@@ -121,6 +126,8 @@
     <Compile Include="Materials\OBSOLETE\MaterialDatabaseFromStruxmlOBSOLETE.cs" />
     <Compile Include="Materials\TimberPanelTypeFromStruxml.cs" />
     <Compile Include="Model\ModelConstruct.cs" />
+    <Compile Include="Obsolete\LoadCombinationDeconstructOBSOLETE.cs" />
+    <Compile Include="Obsolete\LoadCombinationConstructOBSOLETE.cs" />
     <Compile Include="Obsolete\ShellEdgeConnectionDefineOBSOLETE.cs" />
     <Compile Include="Results\BarInternalForce.cs" />
     <Compile Include="Results\BarStress.cs" />
@@ -146,9 +153,13 @@
     <Compile Include="Sections\SectionDatabaseFromStruxml.cs" />
     <Compile Include="Sections\SectionDatabaseDefault.cs" />
     <Compile Include="Sections\SectionDatabaseSave.cs" />
+    <Compile Include="Sections\SectionDefine.cs" />
     <Compile Include="Sections\SectionGetSectionByName.cs" />
+    <Compile Include="Shells\SlabPlate.cs" />
+    <Compile Include="Shells\SlabWall.cs" />
     <Compile Include="Supports\LineSupportSimple.cs" />
     <Compile Include="Supports\PointSupportConstruct.cs" />
+    <Compile Include="Supports\StiffnessPoints.cs" />
     <Compile Include="Utils\LoadGroupCombine.cs" />
     <Compile Include="Loads\LoadGroupConstruct.cs" />
     <Compile Include="Loads\LoadCategoryDatabaseDefault.cs" />
@@ -289,7 +300,7 @@
     <Compile Include="Sections\OBSOLETE\SectionDatabaseFromStruxmlOBSOLETE.cs" />
     <Compile Include="Sections\OBSOLETE\SectionDatabaseListSectionNamesOBSOLETE.cs" />
     <Compile Include="Sections\OBSOLETE\SectionDatabaseSaveOBSOLETE.cs" />
-    <Compile Include="Sections\SectionDefine.cs" />
+    <Compile Include="Sections\OBSOLETE\SectionDefineOBSOLETE.cs" />
     <Compile Include="Sections\OBSOLETE\SectionGetSectionByNameOBSOLETE.cs" />
     <Compile Include="Shells\PanelSetExternalEdgeConnectionForContinuousAnalyticalModel.cs" />
     <Compile Include="Shells\ProfiledPlateConstruct.cs" />
@@ -298,11 +309,11 @@
     <Compile Include="Shells\EdgeConnectionHinged.cs" />
     <Compile Include="Shells\EdgeConnectionRigid.cs" />
     <Compile Include="Shells\ShellOrthotropyConstruct.cs" />
-    <Compile Include="Shells\SlabPlateConstruct.cs" />
+    <Compile Include="Shells\OBSOLETE\SlabPlateConstruct_OBSOLETE.cs" />
     <Compile Include="Shells\SlabPlateVariableThickness.cs" />
     <Compile Include="Shells\SlabSetAverageMeshSize.cs" />
     <Compile Include="Shells\SlabSetEdgeConnection.cs" />
-    <Compile Include="Shells\SlabWall.cs" />
+    <Compile Include="Shells\OBSOLETE\SlabWall_OBSOLETE.cs" />
     <Compile Include="Shells\SlabWallVariableThickness.cs" />
     <Compile Include="Shells\ThicknessConstruct.cs" />
     <Compile Include="Shells\TimberPlateConstruct.cs" />
@@ -784,25 +795,30 @@
   </ItemGroup>
   <ItemGroup>
     <None Include="packages.config" />
-    <None Include="Resources\icons\FootfallFullExcitation.bmp" />
+    <EmbeddedResource Include="Resources\icons\FootfallFullExcitation.bmp" />
   </ItemGroup>
   <ItemGroup>
-    <None Include="Resources\icons\FootfallSelfExcitation.bmp" />
+    <EmbeddedResource Include="Resources\icons\FootfallSelfExcitation.bmp" />
   </ItemGroup>
   <ItemGroup>
-    <None Include="Resources\icons\MaterialTimberPlateMaterial.bmp" />
+    <EmbeddedResource Include="Resources\icons\MaterialTimberPlateMaterial.bmp" />
   </ItemGroup>
   <ItemGroup>
-    <None Include="Resources\icons\PanelDeconstruct.bmp" />
+    <EmbeddedResource Include="Resources\icons\PanelDeconstruct.bmp" />
   </ItemGroup>
   <ItemGroup>
-    <None Include="Resources\icons\PanelTimberPlateDefine.bmp" />
+    <EmbeddedResource Include="Resources\icons\PanelTimberPlateDefine.bmp" />
   </ItemGroup>
   <ItemGroup>
-    <None Include="Resources\icons\CalculateFootfall.bmp" />
+    <EmbeddedResource Include="Resources\icons\CalculateFootfall.bmp" />
   </ItemGroup>
   <ItemGroup>
     <Content Include="images\logo.png" />
+    <None Include="Resources\icons\deconstruct_icon.png" />
+    <None Include="Resources\icons\StagesDeconstruct.png" />
+    <None Include="Resources\icons\LineStressLoadDeconstruct.png" />
+    <None Include="Resources\icons\LineStressLoadConstruct.png" />
+    <EmbeddedResource Include="Resources\icons\StiffnessPoint.png" />
     <EmbeddedResource Include="Resources\icons\RebarAddToElement.jpg" />
     <EmbeddedResource Include="Resources\icons\Stages.png" />
     <EmbeddedResource Include="Resources\icons\Stage_ActivatedLoad.png" />
@@ -810,38 +826,28 @@
     <EmbeddedResource Include="Resources\icons\ResultType.png" />
     <EmbeddedResource Include="Resources\icons\results.png" />
     <EmbeddedResource Include="Resources\icons\quantity.png" />
-    <None Include="Resources\icons\LoadGroupDeconstruct.bmp" />
-    <None Include="Resources\icons\CombineLoadGroups.bmp" />
-    <None Include="Resources\icons\LoadCategory.bmp" />
-    <None Include="Resources\icons\LoadCategoryDeconstruct.bmp" />
-    <None Include="Resources\icons\LoadCategoryDatabaseDefault.bmp" />
-    <None Include="Resources\icons\LoadCategoryDatabaseListCategoryNames.bmp" />
-    <None Include="Resources\icons\LoadCategoryDatabaseGetCategoryByName.bmp" />
-    <None Include="Resources\Fd_TabIcon_24_24.png" />
+    <EmbeddedResource Include="Resources\icons\LoadGroupDeconstruct.bmp" />
+    <EmbeddedResource Include="Resources\icons\CombineLoadGroups.bmp" />
+    <EmbeddedResource Include="Resources\icons\LoadCategory.bmp" />
+    <EmbeddedResource Include="Resources\icons\LoadCategoryDeconstruct.bmp" />
+    <EmbeddedResource Include="Resources\icons\LoadCategoryDatabaseDefault.bmp" />
+    <EmbeddedResource Include="Resources\icons\LoadCategoryDatabaseListCategoryNames.bmp" />
+    <EmbeddedResource Include="Resources\icons\LoadCategoryDatabaseGetCategoryByName.bmp" />
+    <EmbeddedResource Include="Resources\Fd_TabIcon_24_24.png" />
     <EmbeddedResource Include="Resources\icons\feabar.png" />
     <EmbeddedResource Include="Resources\icons\feanode.png" />
     <EmbeddedResource Include="Resources\icons\feashell.png" />
-    <Content Include="Resources\icons\LoadCoefficientsDataBase.bmp" />
-    <Content Include="Resources\icons\LoadGroup.bmp" />
+    <EmbeddedResource Include="Resources\icons\LoadGroup.bmp" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\FemDesign.Core\FemDesign.Core.csproj">
       <Project>{1d91ebf4-a473-4c5b-a171-ab2da1b7017b}</Project>
       <Name>FemDesign.Core</Name>
     </ProjectReference>
-    <None Include="Resources\icons\Help.bmp" />
-  </ItemGroup>
-  <ItemGroup>
-    <None Include="Resources\fem-design.png" />
-  </ItemGroup>
-  <ItemGroup>
-    <None Include="Resources\fdlogo.png" />
-  </ItemGroup>
-  <ItemGroup>
-    <None Include="Resources\fem-design-21.png" />
+    <EmbeddedResource Include="Resources\icons\Help.bmp" />
   </ItemGroup>
   <ItemGroup>
-    <None Include="Resources\Untitled.png" />
+    <EmbeddedResource Include="Resources\fdlogo.png" />
   </ItemGroup>
   <ItemGroup />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSHARP.Targets" />
diff --git a/FemDesign.Grasshopper/Info/Info.cs b/FemDesign.Grasshopper/Info/Info.cs
index 121ce5cbd..a600fedfd 100644
--- a/FemDesign.Grasshopper/Info/Info.cs
+++ b/FemDesign.Grasshopper/Info/Info.cs
@@ -47,7 +47,7 @@ protected override void SolveInstance(IGH_DataAccess DA)
             var current = Info.GetCurrentFemDesignApiVersion();
 
             if (current != VersionWhenFirstCreated)
-                AddRuntimeMessage(GH_RuntimeMessageLevel.Warning, $"The version of this script ({current}) is different than the version it was created with ({VersionWhenFirstCreated})");
+                AddRuntimeMessage(GH_RuntimeMessageLevel.Warning, $"The version of FEM-Design API installed ({current}) is different than the version when this script was created ({VersionWhenFirstCreated}). Most things are expected to work anyways. If you update the components marked with the \"OLD\"-tag it is recommended that you also create a new \"Info\"-component to indicate that this script has been updated to the current version ({current}).");
         }
         public override void CreateAttributes()
         {
diff --git a/FemDesign.Grasshopper/Loads/LineStressLoadDefine.cs b/FemDesign.Grasshopper/Loads/LineStressLoadDefine.cs
new file mode 100644
index 000000000..9c7a07bd6
--- /dev/null
+++ b/FemDesign.Grasshopper/Loads/LineStressLoadDefine.cs
@@ -0,0 +1,79 @@
+// https://strusoft.com/
+using System;
+using GH = Grasshopper;
+using Grasshopper.Kernel;
+using Rhino.Geometry;
+
+namespace FemDesign.Grasshopper
+{
+    public class LineStressLoad : GH_Component
+    {
+        public LineStressLoad() : base("LineStressLoad.Define", "Define", "Creates a line stress load.", CategoryName.Name(), SubCategoryName.Cat3())
+        {
+
+        }
+        protected override void RegisterInputParams(GH_InputParamManager pManager)
+        {
+            pManager.AddCurveParameter("Curve", "Curve", "Curve defining the line stress load.", GH_ParamAccess.item);
+            pManager.AddVectorParameter("Direction", "Direction", "Reference axis for Moment Stress. Default is LocalY", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddNumberParameter("n1", "n1", "Force at start. Or the force at both the start and end of the curve. [kN]\n+ compression\n- tension", GH_ParamAccess.item);
+            pManager.AddNumberParameter("n2", "n2", "Force at end. Optional. [kN]", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddNumberParameter("m1", "m1", "Moment at start. Or the moment at both the start and end of the curve. [kNm]", GH_ParamAccess.item, 0.0);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddNumberParameter("m2", "m2", "Moment at end. Optional. [kNm]", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+
+            pManager.AddGenericParameter("LoadCase", "LoadCase", "LoadCase.", GH_ParamAccess.item);
+
+            pManager.AddTextParameter("Comment", "Comment", "Comment.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+        }
+        protected override void RegisterOutputParams(GH_OutputParamManager pManager)
+        {
+            pManager.AddGenericParameter("StressLoad", "StressLoad", "Line stress load.", GH_ParamAccess.item);
+        }
+        protected override void SolveInstance(IGH_DataAccess DA)
+        {
+            Curve curve = null;
+            if (!DA.GetData("Curve", ref curve)) return;
+
+            var edge = Convert.FromRhino(curve);
+            var direction = edge.CoordinateSystem.LocalY.ToRhino();
+            DA.GetData("Direction", ref direction);
+
+            double n1 = 0.0;
+            if (!DA.GetData("n1", ref n1)) return;
+
+            double n2 = n1;
+            DA.GetData("n2", ref n2);
+
+            double m1 = 0.0;
+            DA.GetData("m1", ref m1);
+
+            double m2 = m1;
+            DA.GetData("m2", ref m2);
+
+            Loads.LoadCase loadCase = null;
+            if (!DA.GetData("LoadCase", ref loadCase)) return;
+
+            string comment = null;
+            DA.GetData("Comment", ref comment);
+
+            try
+            {
+                var obj = new Loads.LineStressLoad(edge, direction.FromRhino(), n1, n2, m1, m2, loadCase, comment);
+                DA.SetData("StressLoad", obj);
+            }
+            catch (ArgumentException e)
+            {
+                this.AddRuntimeMessage(GH_RuntimeMessageLevel.Error, e.Message);
+            }
+        }
+        protected override System.Drawing.Bitmap Icon => FemDesign.Properties.Resources.LineStressLoadConstruct;
+        public override Guid ComponentGuid => new Guid("22908c81-003d-4281-bc8c-c85029d13af6");
+        public override GH_Exposure Exposure => GH_Exposure.secondary;
+
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Grasshopper/Loads/LoadCombinationConstruct.cs b/FemDesign.Grasshopper/Loads/LoadCombinationConstruct.cs
index bd80ff71d..765e901e0 100644
--- a/FemDesign.Grasshopper/Loads/LoadCombinationConstruct.cs
+++ b/FemDesign.Grasshopper/Loads/LoadCombinationConstruct.cs
@@ -1,82 +1,216 @@
 // https://strusoft.com/
 using System;
+using System.Linq;
 using System.Collections.Generic;
-using Grasshopper.Kernel;
+
 using Rhino.Geometry;
+using Grasshopper.Kernel;
 using Grasshopper.Kernel.Special;
-using FemDesign.Loads;
+using Grasshopper.Kernel.Types;
 using FemDesign.Grasshopper.Extension.ComponentExtension;
 
+using FemDesign.Loads;
+
 namespace FemDesign.Grasshopper
 {
-	public class LoadCombinationConstruct : GH_Component
-	{
-		public LoadCombinationConstruct() : base("LoadCombination.Construct", "Construct", "Construct a LoadCombination from a LoadCase or a list of LoadCases.", CategoryName.Name(), SubCategoryName.Cat3())
-		{
-
-		}
-		protected override void RegisterInputParams(GH_InputParamManager pManager)
-		{
-			pManager.AddTextParameter("Name", "Name", "Name of LoadCombination.", GH_ParamAccess.item);
-			pManager.AddTextParameter("Type", "Type", "Connect 'ValueList' to get the options.\nultimate_ordinary\nultimate_accidental\nultimate_seismic\nserviceability_quasi_permanent\nserviceability_frequent\nserviceability_characteristic.", GH_ParamAccess.item, "ultimate_ordinary");
-			pManager[1].Optional = true;
-			pManager.AddGenericParameter("LoadCase", "LoadCase", "LoadCase to include in LoadCombination. Single LoadCase or list of LoadCases.", GH_ParamAccess.list);
-			pManager.AddNumberParameter("Gamma", "Gamma", "Gamma value for respective LoadCase. Single value or list of values. [-]", GH_ParamAccess.list);
-		}
-		protected override void RegisterOutputParams(GH_OutputParamManager pManager)
-		{
-			pManager.AddGenericParameter("LoadCombination", "LoadCombination.", "LoadCombination.", GH_ParamAccess.item);
-		}
-		protected override void SolveInstance(IGH_DataAccess DA)
-		{
-			// get data
-			string name = null, type = "ultimate_ordinary";
-			List<LoadCase> loadCases = new List<LoadCase>();
-			List<double> gammas = new List<double>();
-			if (!DA.GetData(0, ref name)) { return; }
-
-			DA.GetData(1, ref type);
-
-
-			if (!DA.GetDataList(2, loadCases)) { return; }
-			if (!DA.GetDataList(3, gammas)) { return; }
-
-			var _type = FemDesign.GenericClasses.EnumParser.Parse<LoadCombType>(type);
-
-			if (name == null || type == null || loadCases == null || gammas == null) { return; }
-
-
-			LoadCombination obj = new LoadCombination(name, _type, loadCases, gammas);
-
-			DA.SetData(0, obj);
-		}
-
-		protected override void BeforeSolveInstance()
-		{
-			ValueListUtils.updateValueLists(this, 1, new List<string>
-			{ "ultimate_ordinary",
-				"ultimate_accidental",
-				"ultimate_seismic",
-				"serviceability_quasi_permanent",
-				"serviceability_frequent",
-				"serviceability_characteristic"
-			}, null, 0);
-		}
-
-
-		protected override System.Drawing.Bitmap Icon
-		{
-			get
-			{
-
-				return FemDesign.Properties.Resources.LoadCombinationDefine;
-			}
-		}
-		public override Guid ComponentGuid
-		{
-			get { return new Guid("043982aa-8f6a-41f3-896c-9c9f2f16a8ea"); }
-		}
-
-		public override GH_Exposure Exposure => GH_Exposure.quarternary;
-	}
+    public class LoadCombinationConstruct : GH_Component
+    {
+        public LoadCombinationConstruct() : base("LoadCombination.Construct", "Construct", "Construct a LoadCombination from a LoadCase or a list of LoadCases.", CategoryName.Name(), SubCategoryName.Cat3())
+        {
+
+        }
+        protected override void RegisterInputParams(GH_InputParamManager pManager)
+        {
+            pManager.AddTextParameter("Name", "Name", "Name of LoadCombination.", GH_ParamAccess.item);
+            pManager.AddTextParameter("Type", "Type", "Connect 'ValueList' to get the options.\nultimate_ordinary\nultimate_accidental\nultimate_seismic\nserviceability_quasi_permanent\nserviceability_frequent\nserviceability_characteristic.", GH_ParamAccess.item, "ultimate_ordinary");
+            pManager[1].Optional = true;
+            pManager.AddGenericParameter("LoadCase", "LoadCase", "Load cases to include in LoadCombination.\n\nThis may also include a single construction stage and/or any special load case strings. Connect a ValueList to get the options for the special load cases.", GH_ParamAccess.list);
+            pManager.AddNumberParameter("Gamma", "Gamma", "Gamma value for respective LoadCase. Must be equal to the number of load cases.", GH_ParamAccess.list);
+        }
+        protected override void RegisterOutputParams(GH_OutputParamManager pManager)
+        {
+            pManager.AddGenericParameter("LoadCombination", "LoadCombination.", "LoadCombination.", GH_ParamAccess.item);
+        }
+
+        protected override void SolveInstance(IGH_DataAccess DA)
+        {
+            string name = null, type = "ultimate_ordinary";
+            List<object> loadCasesOrOthers = new List<object>();
+            List<double> gammas = new List<double>();
+            if (!DA.GetData(0, ref name)) { return; }
+            if (!DA.GetDataList(2, loadCasesOrOthers)) { return; }
+            if (!DA.GetDataList(3, gammas)) { return; }
+
+            DA.GetData(1, ref type);
+
+            if (loadCasesOrOthers.Count != gammas.Count)
+            {
+                AddRuntimeMessage(GH_RuntimeMessageLevel.Error, $"The number of load cases ({loadCasesOrOthers.Count}) and gamma values ({gammas.Count}) must be equal.");
+                return;
+            }
+
+            var _type = FemDesign.GenericClasses.EnumParser.Parse<LoadCombType>(type);
+
+            if (name == null || type == null || loadCasesOrOthers == null || gammas == null) { return; }
+
+            LoadCombination loadCombination = new LoadCombination(name, _type);
+
+            LoadCase loadCase = null;
+            Stage stage = null;
+            string text = null;
+            for (int i = 0; i < loadCasesOrOthers.Count; i++)
+            {
+                object loadCaseLike = loadCasesOrOthers[i];
+                double gamma = gammas[i];
+
+                if (loadCaseLike.GetType() == typeof(GH_ObjectWrapper))
+                {
+                    GH_ObjectWrapper wrapper = (GH_ObjectWrapper)loadCaseLike;
+
+                    if (wrapper.Value.TryCast(ref loadCase))
+                        loadCombination.AddLoadCase(loadCase, gamma);
+
+                    //if (wrapper.CastTo(out stage))
+                    else if (wrapper.Value.TryCast(ref stage))
+                        loadCombination.SetStageLoadCase(stage, gamma);
+                }
+
+                else if (loadCaseLike.GetType() == typeof(GH_String))
+                {
+                    GH_String wrapper = (GH_String)loadCaseLike;
+
+                    if (wrapper.Value.TryCast(ref text))
+                    {
+                        string sanitized = text.ToLower()
+                            .Replace("_", " ")
+                            .Replace(".", "")
+                            .Replace(",", "")
+                            .Trim();
+                        switch (sanitized)
+                        {
+                            case "seis max":
+                            case "seismic max":
+                                loadCombination.SeismicMax = new LoadCombinationCaseBase(gamma);
+                                break;
+
+                            case "seis fx-mx":
+                            case "seis res fx-mx":
+                            case "seismic fx-mx":
+                            case "seismic res fx-mx":
+                                loadCombination.SeismicResFxMinusMx = new LoadCombinationCaseBase(gamma);
+                                break;
+
+                            case "seis fx+mx":
+                            case "seis res fx+mx":
+                            case "seismic fx+mx":
+                            case "seismic res fx+mx":
+                                loadCombination.SeismicResFxPlusMx = new LoadCombinationCaseBase(gamma);
+                                break;
+
+                            case "seis fy-my":
+                            case "seis res fy-my":
+                            case "seismic fy-my":
+                            case "seismic res fy-my":
+                                loadCombination.SeismicResFyMinusMy = new LoadCombinationCaseBase(gamma);
+                                break;
+
+                            case "seis fy+my":
+                            case "seis res fy+my":
+                            case "seismic fy+my":
+                            case "seismic res fy+my":
+                                loadCombination.SeismicResFyPlusMy = new LoadCombinationCaseBase(gamma);
+                                break;
+
+                            case "seis fz":
+                            case "seis res fz":
+                            case "seismic fz":
+                            case "seismic res fz":
+                                loadCombination.SeismicResFz = new LoadCombinationCaseBase(gamma);
+                                break;
+
+                            case "t0":
+                            case "ptc t0":
+                                loadCombination.PtcT0 = new LoadCombinationCaseBase(gamma);
+                                break;
+
+                            case "t8":
+                            case "ptc t8":
+                                loadCombination.PtcT8 = new LoadCombinationCaseBase(gamma);
+                                break;
+
+                            case "pile":
+                            case "pile loadcase":
+                            case "pile load case":
+                            case "ldcase pile":
+                            case "loadcase pile":
+                            case "load case pile":
+                            case "neg shaft friction":
+                                loadCombination.PileLoadCase = new LoadCombinationCaseBase(gamma);
+                                break;
+
+                            case "final cs":
+                            case "final stage":
+                            case "final construction stage":
+                                loadCombination.SetFinalStageLoadCase(gamma);
+                                break;
+
+                            default:
+                                AddRuntimeMessage(GH_RuntimeMessageLevel.Error, $"'{wrapper.Value}' is not a valid special load case string.");
+                                break;
+                        }
+                    }
+                }
+
+                else
+                    AddRuntimeMessage(GH_RuntimeMessageLevel.Error, $"'{loadCaseLike}' of type {loadCaseLike.GetType().FullName} is not a valid LoadCase-like object.");
+            }
+
+            DA.SetData(0, loadCombination);
+        }
+
+        protected override void BeforeSolveInstance()
+        {
+            ValueListUtils.updateValueLists(this, 1, new List<string>
+            { "ultimate_ordinary",
+                "ultimate_accidental",
+                "ultimate_seismic",
+                "serviceability_quasi_permanent",
+                "serviceability_frequent",
+                "serviceability_characteristic"
+            }, null, GH_ValueListMode.DropDown);
+
+            ValueListUtils.updateValueLists(this, 2, new List<string>
+            {
+                "Seismic max.",
+                "Seis res, Fx+Mx",
+                "Seis res, Fx-Mx",
+                "Seis res, Fy+My",
+                "Seis res, Fy-My",
+                "Seis res, Fz",
+                "Final construction stage",
+                "PTC T0",
+                "PTC T8",
+                "Neg. Shaft friction"
+            }, null, GH_ValueListMode.DropDown);
+        }
+
+        protected override System.Drawing.Bitmap Icon => FemDesign.Properties.Resources.LoadCombinationDefine;
+        public override Guid ComponentGuid => new Guid("4dc97ef5-44a8-4117-8abd-c94fdadd1f11");
+        public override GH_Exposure Exposure => GH_Exposure.quarternary;
+    }
+
+    public static class CastingExtensions
+    {
+        public static bool TryCast<T>(this object obj, ref T result)
+        {
+            if (obj is T)
+            {
+                result = (T)obj;
+                return true;
+            }
+
+            result = default(T);
+            return false;
+        }
+    }
 }
\ No newline at end of file
diff --git a/FemDesign.Grasshopper/Loads/LoadCombinationSetupCalculation.cs b/FemDesign.Grasshopper/Loads/LoadCombinationSetupCalculation.cs
index 5c73f136c..35f65f29e 100644
--- a/FemDesign.Grasshopper/Loads/LoadCombinationSetupCalculation.cs
+++ b/FemDesign.Grasshopper/Loads/LoadCombinationSetupCalculation.cs
@@ -30,7 +30,7 @@ protected override void RegisterInputParams(GH_InputParamManager pManager)
             pManager[pManager.ParamCount - 1].Optional = true; 
             pManager.AddBooleanParameter("f2nd", "f2nd", "2nd order analysis.", GH_ParamAccess.item, false);
             pManager[pManager.ParamCount - 1].Optional = true; 
-            pManager.AddNumberParameter("Im", "Im", "Imperfection shape for 2nd order analysis.", GH_ParamAccess.item, 0);
+            pManager.AddIntegerParameter("Im", "Im", "Imperfection shape for 2nd order analysis.", GH_ParamAccess.item, 0);
             pManager[pManager.ParamCount - 1].Optional = true; 
             pManager.AddIntegerParameter("Waterlevel", "Waterlevel", "Ground water level. [m]", GH_ParamAccess.item, 0);
             pManager[pManager.ParamCount - 1].Optional = true;
diff --git a/FemDesign.Grasshopper/Loads/LoadGroupConstruct.cs b/FemDesign.Grasshopper/Loads/LoadGroupConstruct.cs
index 465447fb8..047af41c8 100644
--- a/FemDesign.Grasshopper/Loads/LoadGroupConstruct.cs
+++ b/FemDesign.Grasshopper/Loads/LoadGroupConstruct.cs
@@ -53,7 +53,7 @@ protected override void SolveInstance(IGH_DataAccess DA)
         {
             // get data
             string name = null;
-            double gamma_d = 0, unfavourableSafetyFactor = 0, favourableSafetyFactor = 0, unfavourableSafetyFactorAccidental = 0, favourableSafetyFactorAccidental = 0, xi = 0.89;
+            double unfavourableSafetyFactor = 0, favourableSafetyFactor = 0, unfavourableSafetyFactorAccidental = 0, favourableSafetyFactorAccidental = 0, xi = 0.89;
             int loadCaseRelation = 0, type = 0, potentiallyLeadingAction = 1;
             List<FemDesign.Loads.LoadCase> loadCases = new List<FemDesign.Loads.LoadCase>();
             FemDesign.Loads.LoadCategory psi = null;
diff --git a/FemDesign.Grasshopper/Materials/OBSOLETE/MaterialGetMaterialByNameOBSOLETE2.cs b/FemDesign.Grasshopper/Materials/OBSOLETE/MaterialGetMaterialByNameOBSOLETE2.cs
index 9c50468ba..57808c199 100644
--- a/FemDesign.Grasshopper/Materials/OBSOLETE/MaterialGetMaterialByNameOBSOLETE2.cs
+++ b/FemDesign.Grasshopper/Materials/OBSOLETE/MaterialGetMaterialByNameOBSOLETE2.cs
@@ -34,7 +34,7 @@ protected override void SolveInstance(IGH_DataAccess DA)
             {
                 material = materials.Where(x => x.Name == materialName).First();
             }
-            catch (Exception ex)
+            catch (Exception)
             {
                 AddRuntimeMessage(GH_RuntimeMessageLevel.Error, $"{materialName} does not exist!");
             }
diff --git a/FemDesign.Grasshopper/Obsolete/LoadCombinationConstructOBSOLETE.cs b/FemDesign.Grasshopper/Obsolete/LoadCombinationConstructOBSOLETE.cs
new file mode 100644
index 000000000..501bc2e9b
--- /dev/null
+++ b/FemDesign.Grasshopper/Obsolete/LoadCombinationConstructOBSOLETE.cs
@@ -0,0 +1,82 @@
+// https://strusoft.com/
+using System;
+using System.Collections.Generic;
+using Grasshopper.Kernel;
+using Rhino.Geometry;
+using Grasshopper.Kernel.Special;
+using FemDesign.Loads;
+using FemDesign.Grasshopper.Extension.ComponentExtension;
+
+namespace FemDesign.Grasshopper
+{
+    public class LoadCombinationConstructOBSOLETE : GH_Component
+    {
+        public LoadCombinationConstructOBSOLETE() : base("LoadCombination.Construct", "Construct", "Construct a LoadCombination from a LoadCase or a list of LoadCases.", CategoryName.Name(), SubCategoryName.Cat3())
+        {
+
+        }
+        protected override void RegisterInputParams(GH_InputParamManager pManager)
+        {
+            pManager.AddTextParameter("Name", "Name", "Name of LoadCombination.", GH_ParamAccess.item);
+            pManager.AddTextParameter("Type", "Type", "Connect 'ValueList' to get the options.\nultimate_ordinary\nultimate_accidental\nultimate_seismic\nserviceability_quasi_permanent\nserviceability_frequent\nserviceability_characteristic.", GH_ParamAccess.item, "ultimate_ordinary");
+            pManager[1].Optional = true;
+            pManager.AddGenericParameter("LoadCase", "LoadCase", "LoadCase to include in LoadCombination. Single LoadCase or list of LoadCases.", GH_ParamAccess.list);
+            pManager.AddNumberParameter("Gamma", "Gamma", "Gamma value for respective LoadCase. Single value or list of values. [-]", GH_ParamAccess.list);
+        }
+        protected override void RegisterOutputParams(GH_OutputParamManager pManager)
+        {
+            pManager.AddGenericParameter("LoadCombination", "LoadCombination.", "LoadCombination.", GH_ParamAccess.item);
+        }
+        protected override void SolveInstance(IGH_DataAccess DA)
+        {
+            // get data
+            string name = null, type = "ultimate_ordinary";
+            List<LoadCase> loadCases = new List<LoadCase>();
+            List<double> gammas = new List<double>();
+            if (!DA.GetData(0, ref name)) { return; }
+
+            DA.GetData(1, ref type);
+
+
+            if (!DA.GetDataList(2, loadCases)) { return; }
+            if (!DA.GetDataList(3, gammas)) { return; }
+
+            var _type = FemDesign.GenericClasses.EnumParser.Parse<LoadCombType>(type);
+
+            if (name == null || type == null || loadCases == null || gammas == null) { return; }
+
+
+            LoadCombination obj = new LoadCombination(name, _type, loadCases, gammas);
+
+            DA.SetData(0, obj);
+        }
+
+        protected override void BeforeSolveInstance()
+        {
+            ValueListUtils.updateValueLists(this, 1, new List<string>
+            { "ultimate_ordinary",
+                "ultimate_accidental",
+                "ultimate_seismic",
+                "serviceability_quasi_permanent",
+                "serviceability_frequent",
+                "serviceability_characteristic"
+            }, null, 0);
+        }
+
+
+        protected override System.Drawing.Bitmap Icon
+        {
+            get
+            {
+
+                return FemDesign.Properties.Resources.LoadCombinationDefine;
+            }
+        }
+        public override Guid ComponentGuid
+        {
+            get { return new Guid("043982aa-8f6a-41f3-896c-9c9f2f16a8ea"); }
+        }
+
+        public override GH_Exposure Exposure => GH_Exposure.hidden;
+    }
+}
diff --git a/FemDesign.Grasshopper/Obsolete/LoadCombinationDeconstructOBSOLETE.cs b/FemDesign.Grasshopper/Obsolete/LoadCombinationDeconstructOBSOLETE.cs
new file mode 100644
index 000000000..687b5f4a0
--- /dev/null
+++ b/FemDesign.Grasshopper/Obsolete/LoadCombinationDeconstructOBSOLETE.cs
@@ -0,0 +1,72 @@
+// https://strusoft.com/
+using System;
+using System.Collections.Generic;
+using Grasshopper.Kernel;
+
+namespace FemDesign.Grasshopper
+{
+    public class LoadCombinationDeconstructOBSOLETE : GH_Component
+    {
+        public LoadCombinationDeconstructOBSOLETE() : base("LoadCombination.Deconstruct", "Deconstruct", "Deconstruct a LoadCombination.", "FEM-Design", "Deconstruct")
+        {
+
+        }
+        protected override void RegisterInputParams(GH_InputParamManager pManager)
+        {
+            pManager.AddGenericParameter("LoadCombination", "LoadCombination", "LoadCombination.", GH_ParamAccess.item);
+        }
+        protected override void RegisterOutputParams(GH_OutputParamManager pManager)
+        {
+            pManager.AddTextParameter("Guid", "Guid", "Guid.", GH_ParamAccess.list);
+            pManager.AddTextParameter("Name", "Name", "Name.", GH_ParamAccess.list);
+            pManager.AddTextParameter("Type", "Type", "Type.", GH_ParamAccess.list);
+            pManager.AddTextParameter("LoadCases", "LoadCases", "LoadCases.", GH_ParamAccess.list);
+            pManager.AddNumberParameter("Gammas", "Gammas", "Gammas.", GH_ParamAccess.list);
+        }
+        protected override void SolveInstance(IGH_DataAccess DA)
+        {
+            // get input
+            FemDesign.Loads.LoadCombination obj = null;
+            if (!DA.GetData(0, ref obj))
+            {
+                return;
+            }
+            if (obj == null)
+            {
+                return;
+            }
+
+            // The following code is to convert 'item' to 'list object'
+            // It is required to construct the Load Combination without graftening the data
+
+            var guidList = new List<object> { obj.Guid };
+
+            var nameList = new List<object> { obj.Name };
+
+            var objectTypeList = new List<object> { obj.Type.ToString() };
+
+
+            // return
+            DA.SetDataList(0, guidList);
+            DA.SetDataList(1, nameList);
+            DA.SetDataList(2, objectTypeList);
+            DA.SetDataList(3, obj.GetLoadCaseGuidsAsString());
+            DA.SetDataList(4, obj.GetGammas());
+
+        }
+        protected override System.Drawing.Bitmap Icon
+        {
+            get
+            {
+                return FemDesign.Properties.Resources.LoadCombinationDeconstruct;
+            }
+        }
+        public override Guid ComponentGuid
+        {
+            get { return new Guid("c1cf57c6-be8c-42a8-a489-4145c2d88896"); }
+        }
+
+        public override GH_Exposure Exposure => GH_Exposure.quarternary;
+
+    }
+}
diff --git a/FemDesign.Grasshopper/Properties/Resources.Designer.cs b/FemDesign.Grasshopper/Properties/Resources.Designer.cs
index c9034ea1c..8ceb8cbe0 100644
--- a/FemDesign.Grasshopper/Properties/Resources.Designer.cs
+++ b/FemDesign.Grasshopper/Properties/Resources.Designer.cs
@@ -290,6 +290,16 @@ internal static System.Drawing.Bitmap CoverTwoWay {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap deconstruct_icon {
+            get {
+                object obj = ResourceManager.GetObject("deconstruct_icon", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized resource of type System.Drawing.Bitmap.
         /// </summary>
@@ -590,6 +600,26 @@ internal static System.Drawing.Bitmap LineLoadMoment {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap LineStressLoadConstruct {
+            get {
+                object obj = ResourceManager.GetObject("LineStressLoadConstruct", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap LineStressLoadDeconstruct {
+            get {
+                object obj = ResourceManager.GetObject("LineStressLoadDeconstruct", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized resource of type System.Drawing.Bitmap.
         /// </summary>
@@ -1650,6 +1680,16 @@ internal static System.Drawing.Bitmap Stages {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap StagesDeconstruct {
+            get {
+                object obj = ResourceManager.GetObject("StagesDeconstruct", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized resource of type System.Drawing.Bitmap.
         /// </summary>
@@ -1690,6 +1730,16 @@ internal static System.Drawing.Bitmap StiffnessMatrix4TypeDeconstruct {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap StiffnessPoint {
+            get {
+                object obj = ResourceManager.GetObject("StiffnessPoint", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized resource of type System.Drawing.Bitmap.
         /// </summary>
diff --git a/FemDesign.Grasshopper/Properties/Resources.resx b/FemDesign.Grasshopper/Properties/Resources.resx
index 6d08b0e57..38c5baf68 100644
--- a/FemDesign.Grasshopper/Properties/Resources.resx
+++ b/FemDesign.Grasshopper/Properties/Resources.resx
@@ -6557,4 +6557,19 @@
   <data name="RebarAddToElement" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Resources\icons\RebarAddToElement.jpg;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
   </data>
+  <data name="StiffnessPoint" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\icons\StiffnessPoint.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="LineStressLoadConstruct" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\icons\LineStressLoadConstruct.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="LineStressLoadDeconstruct" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\icons\LineStressLoadDeconstruct.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="deconstruct_icon" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\icons\deconstruct_icon.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="StagesDeconstruct" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\icons\StagesDeconstruct.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/FemDesign.Grasshopper/Resources/icons/LineStressLoadConstruct.png b/FemDesign.Grasshopper/Resources/icons/LineStressLoadConstruct.png
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HcmV?d00001

diff --git a/FemDesign.Grasshopper/Sections/OBSOLETE/SectionDefineOBSOLETE.cs b/FemDesign.Grasshopper/Sections/OBSOLETE/SectionDefineOBSOLETE.cs
new file mode 100644
index 000000000..c45e5cb31
--- /dev/null
+++ b/FemDesign.Grasshopper/Sections/OBSOLETE/SectionDefineOBSOLETE.cs
@@ -0,0 +1,115 @@
+// https://strusoft.com/
+using System;
+using System.Linq;
+using System.Collections.Generic;
+using Grasshopper.Kernel;
+using Grasshopper.Kernel.Special;
+
+using FemDesign.Grasshopper.Extension.ComponentExtension;
+
+namespace FemDesign.Grasshopper
+{
+    public class SectionDefine_OBSOLETE : GH_Component
+    {
+        public SectionDefine_OBSOLETE() : base("Section.Define", "Define", "Define a new custom section.", CategoryName.Name(), SubCategoryName.Cat4b())
+        {
+
+        }
+        protected override void RegisterInputParams(GH_InputParamManager pManager)
+        {
+            pManager.AddSurfaceParameter("Surfaces", "Srfs", "Item or list of surfaces of section. Surfaces must lie in the XY-plane at z=0.", GH_ParamAccess.list);
+            pManager.AddTextParameter("Name", "Name", "Name of section", GH_ParamAccess.item);
+            pManager.AddTextParameter("MaterialType", "MatType", "Connect 'ValueList' to get the options.\nSteelRolled\nSteelColdWorked\nSteelWelded\nConcrete\nTimber\nUnknown\nUndefined", GH_ParamAccess.item);
+            pManager.AddTextParameter("GroupName", "GroupName", "Name of section group", GH_ParamAccess.item);
+            pManager.AddTextParameter("TypeName", "TypeName", "Name of section type", GH_ParamAccess.item);
+            pManager.AddTextParameter("SizeName", "SizeName", "Name of section size", GH_ParamAccess.item);
+        }
+        protected override void RegisterOutputParams(GH_OutputParamManager pManager)
+        {
+            pManager.AddGenericParameter("Custom Section", "Custom Section", "CustomSection.", GH_ParamAccess.item);
+        }
+        protected override void SolveInstance(IGH_DataAccess DA)
+        {
+            List<Rhino.Geometry.Brep> breps = new List<Rhino.Geometry.Brep>();
+            if (!DA.GetDataList(0, breps))
+            {
+                return;
+            }
+
+            string name = null;
+            if (!DA.GetData(1, ref name))
+            {
+                return;
+            }
+
+            string matType = null;
+            if (!DA.GetData(2, ref matType))
+            {
+                return;
+            }
+
+            string groupName = null;
+            if (!DA.GetData(3, ref groupName))
+            {
+                return;
+            }
+
+            string typeName = null;
+            if (!DA.GetData(4, ref typeName))
+            {
+                return;
+            }
+
+            string sizeName = null;
+            if (!DA.GetData(5, ref sizeName))
+            {
+                return;
+            }
+
+            if (name == null || matType == null || groupName == null || typeName == null || sizeName == null)
+            {
+                return;
+            }
+
+            // convert geometry
+            List<FemDesign.Geometry.Region> regions = new List<FemDesign.Geometry.Region>();
+            foreach (Rhino.Geometry.Brep brep in breps)
+            {
+                regions.Add(brep.FromRhino());
+            }
+
+            // create region group
+            FemDesign.Geometry.RegionGroup regionGroup = new FemDesign.Geometry.RegionGroup(regions);
+
+            // get mat type
+            FemDesign.Materials.MaterialTypeEnum matTypeEnum = (FemDesign.Materials.MaterialTypeEnum)Enum.Parse(typeof(FemDesign.Materials.MaterialTypeEnum), matType);
+
+            // create section
+            FemDesign.Sections.Section section = new FemDesign.Sections.Section(regionGroup, name, "custom", matTypeEnum, groupName, typeName, sizeName);
+
+            // return
+            DA.SetData(0, section);
+        }
+        protected override System.Drawing.Bitmap Icon
+        {
+            get
+            {
+                return FemDesign.Properties.Resources.SectionDefine;
+            }
+        }
+        public override Guid ComponentGuid
+        {
+            get { return new Guid("637c784c-7832-4a23-8cd7-a8a942dbb272"); }
+        }
+
+        protected override void BeforeSolveInstance()
+        {
+            ValueListUtils.updateValueLists(this, 2, Enum.GetNames(typeof( FemDesign.Materials.MaterialTypeEnum )).ToList()
+            , null, GH_ValueListMode.DropDown);
+        }
+
+        public override GH_Exposure Exposure => GH_Exposure.hidden;
+
+
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Grasshopper/Sections/SectionDatabaseSave.cs b/FemDesign.Grasshopper/Sections/SectionDatabaseSave.cs
index b52dd5852..83492cc7c 100644
--- a/FemDesign.Grasshopper/Sections/SectionDatabaseSave.cs
+++ b/FemDesign.Grasshopper/Sections/SectionDatabaseSave.cs
@@ -45,7 +45,7 @@ protected override void SolveInstance(IGH_DataAccess DA)
             foreach(var section in sections)
                 obj.AddNewSection(section);
 
-            database.SerializeSectionDatabase(filePath);
+            obj.SerializeSectionDatabase(filePath);
         }
         protected override System.Drawing.Bitmap Icon
         {
diff --git a/FemDesign.Grasshopper/Sections/SectionDefine.cs b/FemDesign.Grasshopper/Sections/SectionDefine.cs
index ef8fac235..d7604e83e 100644
--- a/FemDesign.Grasshopper/Sections/SectionDefine.cs
+++ b/FemDesign.Grasshopper/Sections/SectionDefine.cs
@@ -1,9 +1,11 @@
-// https://strusoft.com/
+// https://strusoft.com/
 using System;
 using System.Linq;
 using System.Collections.Generic;
 using Grasshopper.Kernel;
+using Grasshopper.Kernel.Special;
 
+using FemDesign.Grasshopper.Extension.ComponentExtension;
 
 namespace FemDesign.Grasshopper
 {
@@ -16,11 +18,10 @@ public class SectionDefine : GH_Component
         protected override void RegisterInputParams(GH_InputParamManager pManager)
         {
             pManager.AddSurfaceParameter("Surfaces", "Srfs", "Item or list of surfaces of section. Surfaces must lie in the XY-plane at z=0.", GH_ParamAccess.list);
-            pManager.AddTextParameter("Name", "Name", "Name of section", GH_ParamAccess.item);
-            pManager.AddTextParameter("MaterialType", "MatType", "Material type. Choice: SteelRolled/SteelColdWorked/SteelWelded/Concrete/Timber", GH_ParamAccess.item);
+            pManager.AddTextParameter("MaterialType", "MatType", "Connect 'ValueList' to get the options.\nSteelRolled\nSteelColdWorked\nSteelWelded\nConcrete\nTimber\nUnknown\nUndefined", GH_ParamAccess.item);
             pManager.AddTextParameter("GroupName", "GroupName", "Name of section group", GH_ParamAccess.item);
             pManager.AddTextParameter("TypeName", "TypeName", "Name of section type", GH_ParamAccess.item);
-            pManager.AddTextParameter("SizeName", "SizeName", "Name of section size", GH_ParamAccess.item);
+            pManager.AddTextParameter("SizeName", "SizeName", "Name of section size. The name must be unique", GH_ParamAccess.item);
         }
         protected override void RegisterOutputParams(GH_OutputParamManager pManager)
         {
@@ -34,37 +35,31 @@ protected override void SolveInstance(IGH_DataAccess DA)
                 return;
             }
 
-            string name = null;
-            if (!DA.GetData(1, ref name))
-            {
-                return;
-            }
-
             string matType = null;
-            if (!DA.GetData(2, ref matType))
+            if (!DA.GetData(1, ref matType))
             {
                 return;
             }
 
             string groupName = null;
-            if (!DA.GetData(3, ref groupName))
+            if (!DA.GetData(2, ref groupName))
             {
                 return;
             }
 
             string typeName = null;
-            if (!DA.GetData(4, ref typeName))
+            if (!DA.GetData(3, ref typeName))
             {
                 return;
             }
 
             string sizeName = null;
-            if (!DA.GetData(5, ref sizeName))
+            if (!DA.GetData(4, ref sizeName))
             {
                 return;
             }
 
-            if (name == null || matType == null || groupName == null || typeName == null || sizeName == null)
+            if (matType == null || groupName == null || typeName == null || sizeName == null)
             {
                 return;
             }
@@ -83,7 +78,7 @@ protected override void SolveInstance(IGH_DataAccess DA)
             FemDesign.Materials.MaterialTypeEnum matTypeEnum = (FemDesign.Materials.MaterialTypeEnum)Enum.Parse(typeof(FemDesign.Materials.MaterialTypeEnum), matType);
 
             // create section
-            FemDesign.Sections.Section section = new FemDesign.Sections.Section(regionGroup, name, "custom", matTypeEnum, groupName, typeName, sizeName);
+            FemDesign.Sections.Section section = new FemDesign.Sections.Section(regionGroup, "custom", matTypeEnum, groupName, typeName, sizeName);
 
             // return
             DA.SetData(0, section);
@@ -97,8 +92,15 @@ protected override System.Drawing.Bitmap Icon
         }
         public override Guid ComponentGuid
         {
-            get { return new Guid("637c784c-7832-4a23-8cd7-a8a942dbb272"); }
+            get { return new Guid("{FD3B284F-1199-4870-8902-5937A1BADE71}"); }
         }
+
+        protected override void BeforeSolveInstance()
+        {
+            ValueListUtils.updateValueLists(this, 1, Enum.GetNames(typeof(FemDesign.Materials.MaterialTypeEnum)).ToList()
+            , null, GH_ValueListMode.DropDown);
+        }
+
         public override GH_Exposure Exposure => GH_Exposure.tertiary;
 
 
diff --git a/FemDesign.Grasshopper/Shells/SlabPlateConstruct.cs b/FemDesign.Grasshopper/Shells/OBSOLETE/SlabPlateConstruct_OBSOLETE.cs
similarity index 91%
rename from FemDesign.Grasshopper/Shells/SlabPlateConstruct.cs
rename to FemDesign.Grasshopper/Shells/OBSOLETE/SlabPlateConstruct_OBSOLETE.cs
index 67f76387a..76a60b2ee 100644
--- a/FemDesign.Grasshopper/Shells/SlabPlateConstruct.cs
+++ b/FemDesign.Grasshopper/Shells/OBSOLETE/SlabPlateConstruct_OBSOLETE.cs
@@ -6,9 +6,9 @@
 
 namespace FemDesign.Grasshopper
 {
-    public class SlabPlateConstruct: GH_Component
+    public class SlabPlateConstruct_OBSOLETE: GH_Component
     {
-        public SlabPlateConstruct(): base("Plate.Construct", "Construct", "Construct a plate element.", CategoryName.Name(), SubCategoryName.Cat2b())
+        public SlabPlateConstruct_OBSOLETE(): base("Plate", "Construct", "Construct a plate element.", CategoryName.Name(), SubCategoryName.Cat2b())
         {
 
         }
@@ -46,10 +46,7 @@ protected override void SolveInstance(IGH_DataAccess DA)
             DA.GetData(1, ref thickness);
 
             FemDesign.Materials.Material material = null;
-            if(!DA.GetData(2, ref material))
-            {
-                material = FemDesign.Materials.MaterialDatabase.GetDefault().MaterialByName("C30/37");
-            };
+            if(!DA.GetData(2, ref material)) { return; }
 
             FemDesign.Shells.ShellEccentricity eccentricity = FemDesign.Shells.ShellEccentricity.Default;
             if(!DA.GetData(3, ref eccentricity))
@@ -125,7 +122,7 @@ public override Guid ComponentGuid
         {
             get { return new Guid("8c85f3e3-c50b-49ef-9cc0-5f90867bc0a1"); }
         }
-        public override GH_Exposure Exposure => GH_Exposure.primary;
+        public override GH_Exposure Exposure => GH_Exposure.hidden;
 
     }
 }
\ No newline at end of file
diff --git a/FemDesign.Grasshopper/Shells/OBSOLETE/SlabWall_OBSOLETE.cs b/FemDesign.Grasshopper/Shells/OBSOLETE/SlabWall_OBSOLETE.cs
new file mode 100644
index 000000000..c03585795
--- /dev/null
+++ b/FemDesign.Grasshopper/Shells/OBSOLETE/SlabWall_OBSOLETE.cs
@@ -0,0 +1,126 @@
+// https://strusoft.com/
+using System;
+using System.Collections.Generic;
+using Grasshopper.Kernel;
+using Rhino.Geometry;
+
+namespace FemDesign.Grasshopper
+{
+    public class SlabWall_OBSOLETE: GH_Component
+    {
+        public SlabWall_OBSOLETE(): base("Wall", "Construct", "Construct a wall element.", CategoryName.Name(), SubCategoryName.Cat2b())
+        {
+
+        }
+        protected override void RegisterInputParams(GH_InputParamManager pManager)
+        {
+            pManager.AddSurfaceParameter("Surface", "Surface", "Surface must be flat and vertical", GH_ParamAccess.item);
+            pManager.AddNumberParameter("Thickness", "Thickness", "Thickness. [m]", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddGenericParameter("Material", "Material", "Material.", GH_ParamAccess.item);
+            pManager.AddGenericParameter("ShellEccentricity", "Eccentricity", "ShellEccentricity. Optional.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddGenericParameter("ShellOrthotropy", "Orthotropy", "ShellOrthotropy. Optional.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddGenericParameter("EdgeConnection", "EdgeConnection", "EdgeConnection. Optional.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddVectorParameter("LocalX", "LocalX", "Set local x-axis. Vector must be perpendicular to surface local z-axis. Local y-axis will be adjusted accordingly. Optional, local x-axis from surface coordinate system used if undefined.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddVectorParameter("LocalZ", "LocalZ", "Set local z-axis. Vector must be perpendicular to surface local x-axis. Local y-axis will be adjusted accordingly. Optional, local z-axis from surface coordinate system used if undefined.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true; 
+            pManager.AddTextParameter("Identifier", "Identifier", "Identifier. Optional.", GH_ParamAccess.item, "P");
+            pManager[pManager.ParamCount - 1].Optional = true;
+        }
+        protected override void RegisterOutputParams(GH_OutputParamManager pManager)
+        {
+            pManager.AddGenericParameter("Slab", "Slab", "Slab.", GH_ParamAccess.item);
+        }
+        protected override void SolveInstance(IGH_DataAccess DA)
+        {
+            // get input
+            Brep surface = null;
+            if(!DA.GetData(0, ref surface)) { return; }
+
+            double thickness = 0.15;
+            DA.GetData(1, ref thickness);
+
+            FemDesign.Materials.Material material = null;
+            if (!DA.GetData(2, ref material)) { return; }
+
+            FemDesign.Shells.ShellEccentricity eccentricity = FemDesign.Shells.ShellEccentricity.Default;
+            if(!DA.GetData(3, ref eccentricity))
+            {
+                // pass
+            }
+            
+            FemDesign.Shells.ShellOrthotropy orthotropy = FemDesign.Shells.ShellOrthotropy.Default;
+            if(!DA.GetData(4, ref orthotropy))
+            {
+                // pass
+            }
+            
+            FemDesign.Shells.EdgeConnection edgeConnection = FemDesign.Shells.EdgeConnection.Rigid;
+            if(!DA.GetData(5, ref edgeConnection))
+            {
+                // pass
+            }
+
+            Rhino.Geometry.Vector3d x = Vector3d.Zero;
+            if (!DA.GetData(6, ref x))
+            {
+                // pass
+            }
+
+            Rhino.Geometry.Vector3d z = Vector3d.Zero;
+            if (!DA.GetData(7, ref z))
+            {
+                // pass
+            }
+            
+            string identifier = "P";
+            if(!DA.GetData(8, ref identifier))
+            {
+                // pass
+            }
+            if (surface == null || material == null || eccentricity == null || orthotropy == null || edgeConnection == null || identifier == null) { return; }
+
+            //
+            FemDesign.Geometry.Region region = surface.FromRhino();
+
+            //
+            List<FemDesign.Shells.Thickness> thicknessObj = new List<FemDesign.Shells.Thickness>();
+            thicknessObj.Add(new FemDesign.Shells.Thickness(region.CoordinateSystem.Origin, thickness));
+
+            //
+            FemDesign.Shells.Slab obj = FemDesign.Shells.Slab.Wall(identifier, material, region, edgeConnection, eccentricity, orthotropy, thicknessObj);
+
+            // set local x-axis
+            if (!x.Equals(Vector3d.Zero))
+            {
+                obj.SlabPart.LocalX = x.FromRhino();
+            }
+
+            // set local z-axis
+            if (!z.Equals(Vector3d.Zero))
+            {
+                obj.SlabPart.LocalZ = z.FromRhino();
+            }
+            
+            // return
+            DA.SetData(0, obj);
+        }
+        protected override System.Drawing.Bitmap Icon
+        {
+            get
+            {
+                return FemDesign.Properties.Resources.Wall;
+            }
+        }
+        public override Guid ComponentGuid
+        {
+            get { return new Guid("e26cd4b0-0582-4ea5-8705-3b9695937277"); }
+        }
+        public override GH_Exposure Exposure => GH_Exposure.hidden;
+
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Grasshopper/Shells/SlabPlate.cs b/FemDesign.Grasshopper/Shells/SlabPlate.cs
new file mode 100644
index 000000000..498828911
--- /dev/null
+++ b/FemDesign.Grasshopper/Shells/SlabPlate.cs
@@ -0,0 +1,127 @@
+// https://strusoft.com/
+using System;
+using System.Collections.Generic;
+using Grasshopper.Kernel;
+using Rhino.Geometry;
+
+namespace FemDesign.Grasshopper
+{
+    public class SlabPlate: GH_Component
+    {
+        public SlabPlate(): base("Plate", "Construct", "Construct a plate element.", CategoryName.Name(), SubCategoryName.Cat2b())
+        {
+
+        }
+        protected override void RegisterInputParams(GH_InputParamManager pManager)
+        {
+            pManager.AddSurfaceParameter("Surface", "Surface", "Surface must be flat.", GH_ParamAccess.item);
+            pManager.AddNumberParameter("Thickness", "Thickness", "Thickness. [m]", GH_ParamAccess.item, 0.15);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddGenericParameter("Material", "Material", "Material.", GH_ParamAccess.item);
+            pManager.AddGenericParameter("ShellEccentricity", "Eccentricity", "ShellEccentricity. Optional.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddGenericParameter("ShellOrthotropy", "Orthotropy", "ShellOrthotropy. Optional.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddGenericParameter("EdgeConnection", "EdgeConnection", "EdgeConnection. Optional.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddVectorParameter("LocalX", "LocalX", "Set local x-axis. Vector must be perpendicular to surface local z-axis. Local y-axis will be adjusted accordingly. Optional, local x-axis from surface coordinate system used if undefined.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddVectorParameter("LocalZ", "LocalZ", "Set local z-axis. Vector must be perpendicular to surface local x-axis. Local y-axis will be adjusted accordingly. Optional, local z-axis from surface coordinate system used if undefined.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+            pManager.AddTextParameter("Identifier", "Identifier", "Identifier. Optional.", GH_ParamAccess.item, "P");
+            pManager[pManager.ParamCount - 1].Optional = true;
+        }
+        protected override void RegisterOutputParams(GH_OutputParamManager pManager)
+        {
+            pManager.AddGenericParameter("Slab", "Slab", "Slab.", GH_ParamAccess.item);
+        }
+        protected override void SolveInstance(IGH_DataAccess DA)
+        {
+            // get input
+            Brep surface = null;
+            if(!DA.GetData(0, ref surface)) { return; }
+
+            double thickness = 0.15;
+            DA.GetData(1, ref thickness);
+
+            FemDesign.Materials.Material material = null;
+            if(!DA.GetData(2, ref material)) { return; }
+
+            FemDesign.Shells.ShellEccentricity eccentricity = FemDesign.Shells.ShellEccentricity.Default;
+            if(!DA.GetData(3, ref eccentricity))
+            {
+                // pass
+            }
+            
+            FemDesign.Shells.ShellOrthotropy orthotropy = FemDesign.Shells.ShellOrthotropy.Default;
+            if(!DA.GetData(4, ref orthotropy))
+            {
+                // pass
+            }
+            
+            FemDesign.Shells.EdgeConnection edgeConnection = FemDesign.Shells.EdgeConnection.Rigid;
+            if(!DA.GetData(5, ref edgeConnection))
+            {
+                // pass
+            }
+
+            Rhino.Geometry.Vector3d x = Vector3d.Zero;
+            if (!DA.GetData(6, ref x))
+            {
+                // pass
+            }
+
+            Rhino.Geometry.Vector3d z = Vector3d.Zero;
+            if (!DA.GetData(7, ref z))
+            {
+                // pass
+            }
+            
+            string identifier = "P";
+            if(!DA.GetData(8, ref identifier))
+            {
+                // pass
+            }
+
+            if (surface == null || material == null || eccentricity == null || orthotropy == null || edgeConnection == null || identifier == null) { return; }
+
+            //
+            FemDesign.Geometry.Region region = surface.FromRhino();
+
+            //
+            List<FemDesign.Shells.Thickness> thicknessObj = new List<FemDesign.Shells.Thickness>();
+            thicknessObj.Add(new FemDesign.Shells.Thickness(region.CoordinateSystem.Origin, thickness));
+
+            //
+            FemDesign.Shells.Slab obj = FemDesign.Shells.Slab.Plate(identifier, material, region, edgeConnection, eccentricity, orthotropy, thicknessObj);
+
+            // set local x-axis
+            if (!x.Equals(Vector3d.Zero))
+            {
+                obj.SlabPart.LocalX = x.FromRhino();
+            }
+
+            // set local z-axis
+            if (!z.Equals(Vector3d.Zero))
+            {
+                obj.SlabPart.LocalZ = z.FromRhino();
+            }
+
+            // return
+            DA.SetData(0, obj);
+        }
+        protected override System.Drawing.Bitmap Icon
+        {
+            get
+            {
+                return FemDesign.Properties.Resources.Plate;
+            }
+        }
+        public override Guid ComponentGuid
+        {
+            get { return new Guid("{2C49099C-6ABF-4EFE-A30C-45A2B81BDC79}"); }
+        }
+        public override GH_Exposure Exposure => GH_Exposure.primary;
+
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Grasshopper/Shells/SlabWall.cs b/FemDesign.Grasshopper/Shells/SlabWall.cs
index fb536295e..07b4b1aff 100644
--- a/FemDesign.Grasshopper/Shells/SlabWall.cs
+++ b/FemDesign.Grasshopper/Shells/SlabWall.cs
@@ -18,7 +18,6 @@ protected override void RegisterInputParams(GH_InputParamManager pManager)
             pManager.AddNumberParameter("Thickness", "Thickness", "Thickness. [m]", GH_ParamAccess.item);
             pManager[pManager.ParamCount - 1].Optional = true;
             pManager.AddGenericParameter("Material", "Material", "Material.", GH_ParamAccess.item);
-            pManager[pManager.ParamCount - 1].Optional = true;
             pManager.AddGenericParameter("ShellEccentricity", "Eccentricity", "ShellEccentricity. Optional.", GH_ParamAccess.item);
             pManager[pManager.ParamCount - 1].Optional = true;
             pManager.AddGenericParameter("ShellOrthotropy", "Orthotropy", "ShellOrthotropy. Optional.", GH_ParamAccess.item);
@@ -46,10 +45,7 @@ protected override void SolveInstance(IGH_DataAccess DA)
             DA.GetData(1, ref thickness);
 
             FemDesign.Materials.Material material = null;
-            if (!DA.GetData(2, ref material))
-            {
-                material = FemDesign.Materials.MaterialDatabase.GetDefault().MaterialByName("C30/37");
-            };
+            if (!DA.GetData(2, ref material)) { return; }
 
             FemDesign.Shells.ShellEccentricity eccentricity = FemDesign.Shells.ShellEccentricity.Default;
             if(!DA.GetData(3, ref eccentricity))
@@ -122,7 +118,7 @@ protected override System.Drawing.Bitmap Icon
         }
         public override Guid ComponentGuid
         {
-            get { return new Guid("e26cd4b0-0582-4ea5-8705-3b9695937277"); }
+            get { return new Guid("{C3C9CD9E-BEE2-4B12-B0DE-60817FA7D2F5}"); }
         }
         public override GH_Exposure Exposure => GH_Exposure.primary;
 
diff --git a/FemDesign.Grasshopper/Supports/StiffnessPoints.cs b/FemDesign.Grasshopper/Supports/StiffnessPoints.cs
new file mode 100644
index 000000000..f440fdd24
--- /dev/null
+++ b/FemDesign.Grasshopper/Supports/StiffnessPoints.cs
@@ -0,0 +1,61 @@
+// https://strusoft.com/
+using System;
+using Grasshopper.Kernel;
+using Rhino.Geometry;
+using FemDesign.Releases;
+
+
+namespace FemDesign.Grasshopper
+{
+    public class StiffnessPoint : GH_Component
+    {
+        public StiffnessPoint() : base("StiffnessPoint", "StiffnessPoint", "Add Stiffness Point to a SurfaceSupport element.", CategoryName.Name(),
+            SubCategoryName.Cat1())
+        {
+
+        }
+        protected override void RegisterInputParams(GH_InputParamManager pManager)
+        {
+            pManager.AddGenericParameter("SurfaceSupport", "SurfaceSupport", "", GH_ParamAccess.item);
+            pManager.AddPointParameter("Position", "Position", "", GH_ParamAccess.item);
+            pManager.AddGenericParameter("Motions", "Motions", "Motions stiffness for the point.", GH_ParamAccess.item);
+            pManager.AddGenericParameter("Plastic Limits Forces Motions", "PlaLimM", "Plastic limits forces for motion springs. Optional.", GH_ParamAccess.item);
+            pManager[pManager.ParamCount - 1].Optional = true;
+        }
+        protected override void RegisterOutputParams(GH_OutputParamManager pManager)
+        {
+            pManager.AddGenericParameter("StiffnessPoint", "StiffnessPoint", "Define StiffnessPoint.", GH_ParamAccess.item);
+        }
+        protected override void SolveInstance(IGH_DataAccess DA)
+        {
+            FemDesign.Supports.SurfaceSupport surfaceSupport = null;
+            Point3d point = Point3d.Origin;
+            Motions motions = null;
+            MotionsPlasticLimits motionsPlasticLimit = null;
+
+            if (!DA.GetData(0, ref surfaceSupport)) { return; }
+            if (!DA.GetData(1, ref point)) { return; }
+            if (!DA.GetData(2, ref motions)) { return; }
+            DA.GetData(3, ref motionsPlasticLimit);
+
+            var stiffPoint = new FemDesign.Supports.StiffnessPoint(surfaceSupport, point.FromRhino(), motions, motionsPlasticLimit);
+
+
+            DA.SetData(0, stiffPoint);
+        }
+        protected override System.Drawing.Bitmap Icon
+        {
+            get
+            {
+                return FemDesign.Properties.Resources.StiffnessPoint;
+            }
+        }
+        public override Guid ComponentGuid
+        {
+            get { return new Guid("{3FA53044-C6D9-4483-BE65-AC8539FE43F6}"); }
+        }
+
+        public override GH_Exposure Exposure => GH_Exposure.tertiary;
+
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Tests/Bars/BarTests.cs b/FemDesign.Tests/Bars/BarTests.cs
new file mode 100644
index 000000000..174b5292c
--- /dev/null
+++ b/FemDesign.Tests/Bars/BarTests.cs
@@ -0,0 +1,178 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using FemDesign.Bars;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using FemDesign.Sections;
+using FemDesign.Materials;
+
+namespace FemDesign.Bars.Tests
+{
+    [TestClass()]
+    public class BarTests
+    {
+        [TestInitialize]
+        public void ResetInstanceCounters()
+        {
+            // Reset all instance counters before each tests
+            PrivateType barPartType = new PrivateType(typeof(BarPart));
+            barPartType.SetStaticFieldOrProperty("_barInstance", 0);
+            barPartType.SetStaticFieldOrProperty("_columnInstance", 0);
+            barPartType.SetStaticFieldOrProperty("_trussInstance", 0);
+        }
+
+        [TestMethod("Bar constructor 1")]
+        public void BarConstructorTest1()
+        {
+            var edge = new Geometry.LineEdge(new Geometry.Point3d(0, 0, 0), new Geometry.Point3d(1, 0, 0));
+            Bar bar = new Bar(edge, new Material(), GetTestSection(), "Truss");
+
+            Assert.AreEqual("Truss", bar.Identifier);
+            Assert.AreEqual(BarType.Truss, bar.Type);
+            Assert.AreEqual(1, bar.Instance);
+
+            Bar bar2 = new Bar(edge, new Material(), GetTestSection(), "Truss");
+            Assert.AreEqual(2, bar2.Instance);
+        }
+
+        [TestMethod("Name, Identifier etc.")]
+        public void BarTest()
+        {
+            var bar = GetTestBar();
+            bar.Identifier = "TestName";
+
+            Assert.AreEqual("TestName", bar.Identifier);
+            Assert.AreEqual("TestName.2", bar.Name);
+            Assert.AreEqual(2, bar.Instance);
+        }
+
+        [TestMethod("Name, Identifier etc. (BarPart)")]
+        public void BarPartTest()
+        {
+            var bar = GetTestBar();
+            bar.Identifier = "BP";
+
+            Assert.AreEqual("BP", bar.Identifier);
+            Assert.AreEqual("BP.2", bar.Name);
+            Assert.AreEqual(2, bar.Instance);
+
+            Assert.AreEqual("BP", bar.BarPart.Identifier);
+            Assert.AreEqual("BP.2.1", bar.BarPart.Name);
+            Assert.AreEqual(2, bar.BarPart.Instance);
+        }
+
+        [TestMethod("Identifier 1")]
+        public void BarTest3()
+        {
+            var bar = GetTestBar();
+            bar.Identifier = "BeamOfLight";
+            bar.Identifier = bar.Identifier;
+            bar.Identifier = bar.Identifier;
+            bar.Identifier = bar.Identifier;
+            bar.Identifier = bar.Identifier;
+            bar.Identifier = bar.Identifier;
+
+            Assert.AreEqual("BeamOfLight", bar.Identifier);
+        }
+
+        [TestMethod("Identifier 2")]
+        public void BarTest4()
+        {
+            var bar = GetTestBar();
+            bar.Identifier = "Repeat";
+            bar.Identifier = "Repeat";
+            bar.Identifier = "Repeat";
+            bar.Identifier = "Repeat";
+            bar.Identifier = "Repeat";
+
+            Assert.AreEqual("Repeat", bar.Identifier);
+        }
+
+        [TestMethod("Identifier validation")]
+        public void BarTest5()
+        {
+            var bar = GetTestBar();
+            
+            bar.Identifier = "Valid";
+            Assert.AreEqual("Valid", bar.Identifier);
+            
+            bar.Identifier = "Valid_1";
+            Assert.AreEqual("Valid_1", bar.Identifier);
+
+            bar.Identifier = "Valid.1.2.3";
+            Assert.AreEqual("Valid.1.2.3", bar.Identifier);
+
+            bar.Identifier = "Valid_åäöÅÄÖ~!£\"%^*()";
+            Assert.AreEqual("Valid_åäöÅÄÖ~!£\"%^*()", bar.Identifier);
+
+            Assert.ThrowsException<ArgumentException>(() => bar.Identifier = null);
+            Assert.ThrowsException<ArgumentException>(() => bar.Identifier = "");
+            Assert.ThrowsException<ArgumentException>(() => bar.Identifier = "invalid char >");
+            Assert.ThrowsException<ArgumentException>(() => bar.Identifier = "invalid char &");
+            Assert.ThrowsException<ArgumentException>(() => bar.Identifier = "invalid char $");
+        }
+
+        [TestMethod("LockedIdentifier 1")]
+        public void LockedIdentifierTest()
+        {
+            var bar = GetTestBar();
+            bar.LockedIdentifier = true;
+
+            Assert.IsTrue(bar.LockedIdentifier);
+            Assert.IsFalse(bar.Name.StartsWith("@"));
+
+            Assert.IsTrue(bar.BarPart.LockedIdentifier);
+            Assert.IsFalse(bar.BarPart.Name.StartsWith("@"));
+        }
+
+        [TestMethod("LockedIdentifier 2")]
+        public void LockedIdentifierTest2()
+        {
+            Bar bar = GetTestBar();
+            bar.LockedIdentifier = false;
+
+            Assert.IsFalse(bar.LockedIdentifier);
+            Assert.IsFalse(bar.Name.StartsWith("@"));
+
+            Assert.IsFalse(bar.BarPart.LockedIdentifier);
+            Assert.IsFalse(bar.BarPart.Name.StartsWith("@"));
+        }
+
+        private static Bar GetTestBar()
+        {
+            var edge = new Geometry.LineEdge(new Geometry.Point3d(0, 0, 0), new Geometry.Point3d(1, 0, 0));
+            Section section = GetTestSection();
+            Material material = new Material();
+
+            return new Beam(edge, material, section, identifier: "Test");
+        }
+
+        private static Section GetTestSection()
+        {
+            return new FemDesign.Sections.Section(
+                            new Geometry.RegionGroup(
+                                new Geometry.Region(
+                                    new List<Geometry.Contour> {
+                            new Geometry.Contour(
+                                new List<Geometry.Edge> {
+                                    new Geometry.CircleEdge(
+                                        0.010,
+                                        Geometry.Point3d.Origin,
+                                        Geometry.CoordinateSystem.Global()
+                                        )
+                                }
+                                )
+                                    }
+                                    )
+                                ),
+                            "custom",
+                            Materials.MaterialTypeEnum.Undefined,
+                            "TestGroup",
+                            "TestType",
+                            "TestSize"
+                            );
+        }
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Tests/Bars/CreateElements.cs b/FemDesign.Tests/Bars/CreateElementsTests.cs
similarity index 99%
rename from FemDesign.Tests/Bars/CreateElements.cs
rename to FemDesign.Tests/Bars/CreateElementsTests.cs
index 1e388f6a0..263af26c8 100644
--- a/FemDesign.Tests/Bars/CreateElements.cs
+++ b/FemDesign.Tests/Bars/CreateElementsTests.cs
@@ -9,7 +9,7 @@
 namespace FemDesign.Bars
 {
     [TestClass()]
-    public class CreateElements
+    public class CreateElementsTests
     {
         [TestCategory("FEM-Design required")]
         [TestMethod("Create a Linear Beam,Bar,Truss and Deserialise")]
diff --git a/FemDesign.Tests/Entities/StiffnessPointsTests.cs b/FemDesign.Tests/Entities/StiffnessPointsTests.cs
new file mode 100644
index 000000000..6d581d2f1
--- /dev/null
+++ b/FemDesign.Tests/Entities/StiffnessPointsTests.cs
@@ -0,0 +1,36 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System;
+using System.IO;
+using System.Collections.Generic;
+using System.Xml.Serialization;
+using FemDesign.Supports;
+
+namespace FemDesign.Entities
+{
+    [TestClass()]
+    public class StiffnessPointsTests
+    {
+        [TestMethod("Create")]
+        public void Create()
+        {
+            var rectangle = FemDesign.Geometry.Region.RectangleXY(Geometry.Point3d.Origin, 5, 5);
+            var surface = new SurfaceSupport(rectangle, Releases.Motions.RigidPoint());
+            var point = new FemDesign.Geometry.Point3d(5, 0.123, -0.39);
+            var stiffnessPoint = new FemDesign.Supports.StiffnessPoint(surface, point, Releases.Motions.RigidPoint(), new Releases.MotionsPlasticLimits(10,10,10,10,10,10));
+
+            var objText = SerializeToString(stiffnessPoint);
+            Console.Write(objText);
+        }
+
+        public static string SerializeToString(StiffnessPoint stiffPoint)
+        {
+            // serialize
+            XmlSerializer serializer = new XmlSerializer(typeof(StiffnessPoint));
+            using (TextWriter writer = new StringWriter())
+            {
+                serializer.Serialize(writer, stiffPoint);
+                return writer.ToString();
+            }
+        }
+    }
+}
diff --git a/FemDesign.Tests/FemDesign.Tests.csproj b/FemDesign.Tests/FemDesign.Tests.csproj
index 7236a8c4d..c286cbbc6 100644
--- a/FemDesign.Tests/FemDesign.Tests.csproj
+++ b/FemDesign.Tests/FemDesign.Tests.csproj
@@ -70,18 +70,21 @@
       <Link>Properties\GlobalAssemblyInfo.cs</Link>
     </Compile>
     <Compile Include="AuxiliaryResults\LabelledSectionTests.cs" />
-    <Compile Include="Bars\CreateElements.cs" />
+    <Compile Include="Bars\BarTests.cs" />
+    <Compile Include="Bars\CreateElementsTests.cs" />
+    <Compile Include="Entities\StiffnessPointsTests.cs" />
     <Compile Include="GenericClasses\EnumHelpersTests.cs" />
     <Compile Include="Geometry\EdgeTests.cs" />
     <Compile Include="Geometry\RegionTest.cs" />
     <Compile Include="Geometry\ProximityTests.cs" />
     <Compile Include="Loads\LoadCaseTests.cs" />
+    <Compile Include="Loads\LoadCombinationTests.cs" />
     <Compile Include="Loads\LoadGroupsCombineTests.cs" />
     <Compile Include="Materials\MaterialDatabaseTests.cs" />
     <Compile Include="Loads\LoadsTests.cs" />
     <Compile Include="Loads\ModelLoadCaseTests.cs" />
     <Compile Include="Model\ModelTests.cs" />
-    <Compile Include="Performance\BeamGeneration.cs" />
+    <Compile Include="Performance\BeamGenerationTests.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Results\BarDisplacementTests.cs" />
     <Compile Include="Results\BarInternalForcesTest.cs" />
@@ -117,6 +120,9 @@
     <None Include="Bars\sections.struxml">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>
+    <None Include="Loads\Load combination case types.struxml">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
     <None Include="Model\global-test-model_MASTER.struxml">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>
diff --git a/FemDesign.Tests/GenericClasses/EnumHelpersTests.cs b/FemDesign.Tests/GenericClasses/EnumHelpersTests.cs
index 6bfe361ba..b81c2c5de 100644
--- a/FemDesign.Tests/GenericClasses/EnumHelpersTests.cs
+++ b/FemDesign.Tests/GenericClasses/EnumHelpersTests.cs
@@ -27,5 +27,17 @@ public void ParseCountryTest()
                     Assert.Fail($"Should be able to parse country \"{countryCode}\" successfully");
                 }
         }
+
+        [TestMethod("Parse Activation Type")]
+        public void ParseLoadActivation()
+		{
+            Assert.IsTrue(EnumParser.Parse<ActivationType>("0") == ActivationType.OnlyInThisStage);
+            Assert.IsTrue(EnumParser.Parse<ActivationType>("1") == ActivationType.FromThisStageOn);
+            Assert.IsTrue(EnumParser.Parse<ActivationType>("2") == ActivationType.ShiftedFromFirstStage);
+            Assert.IsTrue(EnumParser.Parse<ActivationType>("3") == ActivationType.OnlyStageActivatedElements);
+
+            Assert.IsTrue(EnumParser.Parse<ActivationType>("only_in_this_stage") == ActivationType.OnlyInThisStage);
+            Assert.IsTrue(EnumParser.Parse<ActivationType>("only_stage_activated_elem") == ActivationType.OnlyStageActivatedElements);
+        }
     }
 }
\ No newline at end of file
diff --git a/FemDesign.Tests/Geometry/RegionTest.cs b/FemDesign.Tests/Geometry/RegionTest.cs
index 3b3f6ff2e..304d18a09 100644
--- a/FemDesign.Tests/Geometry/RegionTest.cs
+++ b/FemDesign.Tests/Geometry/RegionTest.cs
@@ -12,14 +12,15 @@ public class RegionTest
         [TestMethod("Create Rectangle Slab")]
         public void CreateRectangle()
         {
-            //
             var rectangleWall = FemDesign.Shells.Slab.Wall(
+                Point3d.Origin,
+                new Point3d(10, 10, 0),
                 10.0,
-                20.0,
                 0.1,
                 FemDesign.Materials.MaterialDatabase.GetDefault().MaterialByName("C30/37"));
 
             var rectangleWall2 = FemDesign.Shells.Slab.Plate(
+                Point3d.Origin,
                 10.0,
                 20.0,
                 0.1,
diff --git a/FemDesign.Tests/Loads/Load combination case types.struxml b/FemDesign.Tests/Loads/Load combination case types.struxml
new file mode 100644
index 000000000..627181801
--- /dev/null
+++ b/FemDesign.Tests/Loads/Load combination case types.struxml	
@@ -0,0 +1,440 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- (c) StruSoft 2012-2021, http://www.strusoft.com -->
+<database struxml_version="01.00.000" source_software="FEM-Design 21.00.005" start_time="1970-01-01T00:00:00.000" end_time="2022-10-28T14:38:37.000" guid="623ea81b-e09c-4278-9067-2bbe51a51a4c" convertid="00000000-0000-0000-0000-000000000000" standard="EC" country="S" xmlns="urn:strusoft">
+	<construction_stages last_change="2022-10-28T14:37:55.000" action="added">
+		<stage description="First stage">
+			<activated_load_case case="6ca669aa-55c6-4c0a-866e-49144b5c5f16" factor="1" partitioning="from_this_stage_on"></activated_load_case>
+			<activated_load_case case="2ce4d6d8-6231-4ce0-863d-0f333df1cc4d" factor="1" partitioning="from_this_stage_on"></activated_load_case>
+		</stage>
+		<stage description="Second stage">
+			<activated_load_case case="b04c0d6a-5957-4057-adbd-a95b5a553945" factor="1" partitioning="from_this_stage_on"></activated_load_case>
+		</stage>
+	</construction_stages>
+	<entities>
+		<soil_elements>
+			<strata name="SOIL.1" last_change="2022-10-28T07:51:20.000" action="added" default_filling="a53b6201-9cec-4402-9c05-21cea3da25b8" default_fillings_colour="B97A57" depth_level_limit="-10">
+				<contour>
+					<point x="12.4327116639066" y="12.3904258235923"></point>
+					<point x="12.9129966399232" y="12.3904258235923"></point>
+					<point x="12.9129966399232" y="13.2223085086807"></point>
+					<point x="12.4327116639066" y="13.2223085086807"></point>
+				</contour>
+				<stratum material="a53b6201-9cec-4402-9c05-21cea3da25b8" colour="AAAF37"></stratum>
+				<water_level colour="0040FF" name="a"></water_level>
+			</strata>
+			<borehole guid="c2109f53-1f2b-4095-8493-505f8ed9280d" last_change="2022-10-28T07:51:20.000" action="added" name="BH.1" x="12.4327116639066" y="12.3904258235923" final_ground_level="0">
+				<whole_level_data>
+					<strata_top_levels>0</strata_top_levels>
+					<water_levels>-10</water_levels>
+				</whole_level_data>
+			</borehole>
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+							<normal x="-1" y="0" z="0"></normal>
+						</edge>
+						<edge radius="0.012" start_angle="0" end_angle="1.5707963267949" type="arc">
+							<point x="0.0145" y="0.028" z="0"></point>
+							<normal x="0" y="0" z="-1"></normal>
+							<x_axis x="-1" y="0" z="0"></x_axis>
+						</edge>
+						<edge type="line">
+							<point x="0.0145" y="0.04" z="0"></point>
+							<point x="0.05" y="0.04" z="0"></point>
+							<normal x="0" y="1" z="0"></normal>
+						</edge>
+						<edge type="line">
+							<point x="0.05" y="0.04" z="0"></point>
+							<point x="0.05" y="0.048" z="0"></point>
+							<normal x="0" y="0" z="0"></normal>
+						</edge>
+						<edge type="line">
+							<point x="0.05" y="0.048" z="0"></point>
+							<point x="-0.05" y="0.048" z="0"></point>
+							<normal x="0" y="-1" z="0"></normal>
+						</edge>
+						<edge type="line">
+							<point x="-0.05" y="0.048" z="0"></point>
+							<point x="-0.05" y="0.04" z="0"></point>
+							<normal x="0" y="0" z="0"></normal>
+						</edge>
+						<edge type="line">
+							<point x="-0.05" y="0.04" z="0"></point>
+							<point x="-0.0145" y="0.04" z="0"></point>
+							<normal x="0" y="1" z="0"></normal>
+						</edge>
+						<edge radius="0.012" start_angle="0" end_angle="1.5707963267949" type="arc">
+							<point x="-0.0145" y="0.028" z="0"></point>
+							<normal x="0" y="0" z="-1"></normal>
+							<x_axis x="0" y="1" z="0"></x_axis>
+						</edge>
+						<edge type="line">
+							<point x="-0.0025" y="0.028" z="0"></point>
+							<point x="-0.0025" y="-0.028" z="0"></point>
+							<normal x="1" y="0" z="0"></normal>
+						</edge>
+						<edge radius="0.012" start_angle="0" end_angle="1.5707963267949" type="arc">
+							<point x="-0.0145" y="-0.028" z="0"></point>
+							<normal x="0" y="0" z="-1"></normal>
+							<x_axis x="1" y="0" z="0"></x_axis>
+						</edge>
+						<edge type="line">
+							<point x="-0.0145" y="-0.04" z="0"></point>
+							<point x="-0.05" y="-0.04" z="0"></point>
+							<normal x="0" y="-1" z="0"></normal>
+						</edge>
+						<edge type="line">
+							<point x="-0.05" y="-0.04" z="0"></point>
+							<point x="-0.05" y="-0.048" z="0"></point>
+							<normal x="0" y="0" z="0"></normal>
+						</edge>
+					</contour>
+				</region>
+			</region_group>
+			<end></end>
+		</section>
+		<complex_section guid="9a68f1d2-2ba3-4dd2-920e-305d333e6ab6" last_change="1970-01-01T00:00:00.000" action="added">
+			<section pos="0" guid="4987c406-68d0-42d5-a158-6ab8f608c851">
+				<ecc x="0" y="0" z="0"></ecc>
+				<end></end>
+			</section>
+			<section pos="1" guid="4987c406-68d0-42d5-a158-6ab8f608c851">
+				<ecc x="0" y="0" z="0"></ecc>
+				<end></end>
+			</section>
+		</complex_section>
+		<complex_section guid="89b4fbf8-a59f-4b01-9e31-1f26d6db8bd8" last_change="1970-01-01T00:00:00.000" action="added">
+			<section pos="0" guid="6bd231aa-f0f8-4f40-a212-65f8bbe0ea49">
+				<ecc x="0" y="0" z="0"></ecc>
+				<end></end>
+			</section>
+			<section pos="1" guid="6bd231aa-f0f8-4f40-a212-65f8bbe0ea49">
+				<ecc x="0" y="0" z="0"></ecc>
+				<end></end>
+			</section>
+		</complex_section>
+	</sections>
+	<materials>
+		<material guid="a53b6201-9cec-4402-9c05-21cea3da25b8" last_change="2022-10-28T07:51:03.000" action="added" standard="EC" country="S" name="a">
+			<stratum reference_level="0" Gamma_dry="16" Gamma_sat="18" nu="0.3">
+				<behaviour>
+					<undrained c_uk="130" c_uk_depth="0"></undrained>
+				</behaviour>
+				<model>
+					<linear value="2500" M0_depth="0"></linear>
+				</model>
+			</stratum>
+		</material>
+		<material guid="1ff47a81-e2bb-4699-8cc1-ea0a2e7f500d" last_change="2013-07-19T10:00:49.000" action="added" standard="EC" country="S" name="C35/45">
+			<concrete mass="2.54842" E_0="34000000" E_1="34000000" E_2="34000000" nu_0="0.2" nu_1="0.2" nu_2="0.2" alfa_0="0.00001" alfa_1="0.00001" alfa_2="0.00001" G_0="14166666.6666667" G_1="14166666.6666667" G_2="14166666.6666667" Fck="35" Fck_cube="45" Fctk="2.2" Fctm="3.2" Ecm="34000" gammaC_0="1.5" gammaC_1="1.2" gammaCE="1.2" gammaS_0="1.15" gammaS_1="1" alfaCc="1" alfaCt="1" Fcd_0="23.3333333333333" Fcd_1="29.1666666666667" Fctd_0="1.46666666666667" Fctd_1="1.83333333333333" Ecd_0="22666.6666666667" Ecd_1="28333.3333333333" Epsc2="0.002" Epscu2="0.0035" Epsc3="0.00175" Epscu3="0.0035" environment="0" creep="0" shrinkage="0" nu="0.2" alfa="0.00001"></concrete>
+		</material>
+		<material guid="25a4f1be-a29e-4895-91af-c698f1ee53ae" last_change="2018-08-28T10:01:02.000" action="added" standard="EC" country="S" name="S355J2">
+			<steel mass="7.85" E_0="210000000" E_1="210000000" E_2="210000000" nu_0="0.3" nu_1="0.3" nu_2="0.3" alfa_0="0.000012" alfa_1="0.000012" alfa_2="0.000012" G_0="80769230.7692308" G_1="80769230.7692308" G_2="80769230.7692308" Fyk16="355" Fyk40="345" Fyk63="335" Fyk80="325" Fyk100="315" Fyk150="295" Fyk200="285" Fyk250="275" Fyk400="265" Fuk3="510" Fuk40="470" Fuk100="470" Fuk150="450" Fuk250="450" Fuk400="450" gammaM0_0="1" gammaM0_1="1" gammaM1_0="1" gammaM1_1="1" gammaM2_0="1.2" gammaM2_1="1" gammaM5_0="1" gammaM5_1="1" Ek="210000" Ed_0="210000" Ed_1="210000" nu="0.3" G="80769" alfa="0.000012"></steel>
+		</material>
+	</materials>
+	<ptc_strand_types>
+		<predefined_type name="Y1860S7-15,7-F1-C1" guid="e7d4bb12-a9a1-4706-8b73-9d65a2ac5572" last_change="2022-10-27T08:10:27.000" action="added">
+			<ptc_strand_data f_pk="1860" A_p="150" E_p="195000" density="7.81" relaxation_class="2" Rho_1000="2.5"></ptc_strand_data>
+		</predefined_type>
+	</ptc_strand_types>
+	<vehicle_types>
+		<predefined_type name="EC LM1 Lane 1. (Truck) [Concentrated]" guid="6a9783d4-4a40-43d6-a423-313653524ce9" last_change="2020-11-18T12:09:57.000" action="added">
+			<point_load guid="3329590c-96bf-4b25-918f-9a6346d16922" last_change="2015-11-02T11:36:04.000" action="added" load_type="force">
+				<direction x="0" y="0" z="-1"></direction>
+				<load x="-1.2" y="-1" z="0" val="150"></load>
+			</point_load>
+			<point_load guid="75944593-3082-4b0f-98c3-089fcce353a0" last_change="2015-11-02T11:36:04.000" action="added" load_type="force">
+				<direction x="0" y="0" z="-1"></direction>
+				<load x="0" y="-1" z="0" val="150"></load>
+			</point_load>
+			<point_load guid="4268944a-f2b8-4539-af2d-a9a052c2f4db" last_change="2015-11-02T11:36:04.000" action="added" load_type="force">
+				<direction x="0" y="0" z="-1"></direction>
+				<load x="-1.2" y="1" z="0" val="150"></load>
+			</point_load>
+			<point_load guid="ed84a014-fb83-4f2b-9b3b-481536d47626" last_change="2015-11-02T11:36:04.000" action="added" load_type="force">
+				<direction x="0" y="0" z="-1"></direction>
+				<load x="0" y="1" z="0" val="150"></load>
+			</point_load>
+		</predefined_type>
+	</vehicle_types>
+	<end></end>
+</database>
diff --git a/FemDesign.Tests/Loads/LoadCombinationTests.cs b/FemDesign.Tests/Loads/LoadCombinationTests.cs
new file mode 100644
index 000000000..eac32ec1d
--- /dev/null
+++ b/FemDesign.Tests/Loads/LoadCombinationTests.cs
@@ -0,0 +1,108 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using FemDesign.Loads;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace FemDesign.Loads
+{
+    [TestClass()]
+    public class LoadCombinationTests
+    {
+        [TestCategory("FEM-Design required")]
+        [TestMethod("Load combinations - Deserialize")]
+        public void LoadCombinationTest1()
+        {
+            Model model = Model.DeserializeFromFilePath("Loads/Load combination case types.struxml");
+
+            Assert.AreEqual(4, model.Entities.Loads.LoadCombinations.Count);
+            var comb1 = model.Entities.Loads.LoadCombinations[0];
+            var comb2 = model.Entities.Loads.LoadCombinations[1];
+            var comb3 = model.Entities.Loads.LoadCombinations[2];
+            var comb4 = model.Entities.Loads.LoadCombinations[3];
+
+            // LoadCase and moving load load cases
+            Assert.AreEqual(1, comb1.ModelLoadCase.Count);
+            Assert.AreEqual(1, comb2.ModelLoadCase.Count);
+            Assert.AreEqual(1, comb3.ModelLoadCase.Count);
+            Assert.AreEqual(1, comb4.ModelLoadCase.Count);
+
+            Assert.IsFalse(comb1.ModelLoadCase[0].IsMovingLoadLoadCase);
+            Assert.IsFalse(comb2.ModelLoadCase[0].IsMovingLoadLoadCase);
+            Assert.IsFalse(comb3.ModelLoadCase[0].IsMovingLoadLoadCase);
+            Assert.IsTrue(comb4.ModelLoadCase[0].IsMovingLoadLoadCase);
+
+            Assert.IsNotNull(comb1.ModelLoadCase[0].LoadCase);
+            Assert.IsNotNull(comb2.ModelLoadCase[0].LoadCase);
+            Assert.IsNotNull(comb3.ModelLoadCase[0].LoadCase);
+            Assert.IsNull(comb4.ModelLoadCase[0].LoadCase);
+
+            // Seismic
+            Assert.IsNotNull(comb2.SeismicMax);
+            Assert.IsNotNull(comb2.SeismicResFxMinusMx);
+            Assert.IsNotNull(comb2.SeismicResFxPlusMx);
+            Assert.IsNotNull(comb2.SeismicResFyMinusMy);
+            Assert.IsNotNull(comb2.SeismicResFyPlusMy);
+            Assert.IsNotNull(comb2.SeismicResFz);
+
+            // PTC
+            Assert.IsNotNull(comb3.PtcT0);
+            Assert.IsNotNull(comb3.PtcT8);
+
+            // Pile
+            Assert.IsNotNull(comb3.PileLoadCase);
+
+            // Construction stages
+            Assert.AreEqual("cs.1", comb1.StageLoadCase._stageType);
+            Assert.AreEqual(1, comb1.StageLoadCase.StageIndex);
+            Assert.IsFalse(comb1.StageLoadCase.IsFinalStage);
+            Assert.IsNotNull(comb1.StageLoadCase.Stage);
+
+            Assert.AreEqual("cs.2", comb2.StageLoadCase._stageType);
+            Assert.AreEqual(2, comb2.StageLoadCase.StageIndex);
+            Assert.IsFalse(comb2.StageLoadCase.IsFinalStage);
+            Assert.IsNotNull(comb2.StageLoadCase.Stage);
+
+            Assert.AreEqual("final_cs", comb3.StageLoadCase._stageType);
+            Assert.AreEqual(-1, comb3.StageLoadCase.StageIndex);
+            Assert.IsTrue(comb3.StageLoadCase.IsFinalStage);
+            Assert.IsNull(comb3.StageLoadCase.Stage);
+        }
+
+        [TestCategory("FEM-Design required")]
+        [TestMethod("Load combinations - Serialize")]
+        public void LoadCombinationTest2()
+        {
+            Model expected = Model.DeserializeFromFilePath("Loads/Load combination case types.struxml");
+            expected.SerializeModel("Loads/out.struxml");
+            Model actual = Model.DeserializeFromFilePath("Loads/out.struxml");
+
+            Assert.AreEqual(expected.Entities.Loads.LoadCombinations.Count, actual.Entities.Loads.LoadCombinations.Count);
+            var e = expected.Entities.Loads.LoadCombinations;
+            var a = actual.Entities.Loads.LoadCombinations;
+
+            for (int i = 0; i < a.Count; i++)
+            {
+                Assert.AreEqual(e[i].ModelLoadCase.Count, a[i].ModelLoadCase.Count);
+                for (int j = 0; j < a[i].ModelLoadCase.Count; j++)
+                    Assert.AreEqual(e[i].ModelLoadCase[j].Gamma, a[i].ModelLoadCase[j].Gamma);
+
+                Assert.AreEqual(e[i].SeismicMax?.Gamma, a[i].SeismicMax?.Gamma);
+                Assert.AreEqual(e[i].SeismicResFxPlusMx?.Gamma, a[i].SeismicResFxPlusMx?.Gamma);
+                Assert.AreEqual(e[i].SeismicResFxMinusMx?.Gamma, a[i].SeismicResFxMinusMx?.Gamma);
+                Assert.AreEqual(e[i].SeismicResFyPlusMy?.Gamma, a[i].SeismicResFyPlusMy?.Gamma);
+                Assert.AreEqual(e[i].SeismicResFyMinusMy?.Gamma, a[i].SeismicResFyMinusMy?.Gamma);
+                Assert.AreEqual(e[i].SeismicResFz?.Gamma, a[i].SeismicResFz?.Gamma);
+
+                Assert.AreEqual(e[i].PtcT0?.Gamma, a[i].PtcT0?.Gamma);
+                Assert.AreEqual(e[i].PtcT8?.Gamma, a[i].PtcT8?.Gamma);
+
+                Assert.AreEqual(e[i].PileLoadCase?.Gamma, a[i].PileLoadCase?.Gamma);
+
+                Assert.AreEqual(e[i].StageLoadCase?._stageType, a[i].StageLoadCase?._stageType);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/FemDesign.Tests/Performance/BeamGeneration.cs b/FemDesign.Tests/Performance/BeamGenerationTests.cs
similarity index 98%
rename from FemDesign.Tests/Performance/BeamGeneration.cs
rename to FemDesign.Tests/Performance/BeamGenerationTests.cs
index 447fec18c..47ac53933 100644
--- a/FemDesign.Tests/Performance/BeamGeneration.cs
+++ b/FemDesign.Tests/Performance/BeamGenerationTests.cs
@@ -12,7 +12,7 @@
 namespace FemDesign.Performance
 {
     [TestClass()]
-    public class BeamGeneration
+    public class BeamGenerationTests
     {
         [TestMethod("GenerateBeam")]
         [TestCategory("FEM-Design required"), TestCategory("Performance")]
diff --git a/femdesign-api.sln b/femdesign-api.sln
index 973082be1..254b656bf 100644
--- a/femdesign-api.sln
+++ b/femdesign-api.sln
@@ -10,6 +10,7 @@ EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FemDesign.Dynamo", "FemDesign.Dynamo\FemDesign.Dynamo.csproj", "{419CA97B-DCA5-40EF-A640-7691622E3BE5}"
 	ProjectSection(ProjectDependencies) = postProject
 		{81B4BC3B-8FC7-46FA-8C79-DFAA1C16FE21} = {81B4BC3B-8FC7-46FA-8C79-DFAA1C16FE21}
+		{1D91EBF4-A473-4C5B-A171-AB2DA1B7017B} = {1D91EBF4-A473-4C5B-A171-AB2DA1B7017B}
 	EndProjectSection
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "FemDesign.Examples", "FemDesign.Examples", "{C68FA42C-7B20-4FE3-AED6-8B6619EE5410}"
@@ -46,6 +47,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Example 5 - Design a beam",
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FemDesign.Tests", "FemDesign.Tests\FemDesign.Tests.csproj", "{CCADA385-E5FB-4F08-BC50-1826BBEF9794}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Practical example - Stiffness Point from CSV", "FemDesign.Examples\C#\Practical example - Create Stiffness Point from a CSV\Practical example - Stiffness Point from CSV.csproj", "{CA1CEF5F-1122-4D9B-B21D-3FB260335598}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -61,6 +64,7 @@ Global
 		{04F35658-7446-4513-AA4D-17B4782D3D00}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{04F35658-7446-4513-AA4D-17B4782D3D00}.Release|Any CPU.Build.0 = Release|Any CPU
 		{419CA97B-DCA5-40EF-A640-7691622E3BE5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{419CA97B-DCA5-40EF-A640-7691622E3BE5}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{419CA97B-DCA5-40EF-A640-7691622E3BE5}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{419CA97B-DCA5-40EF-A640-7691622E3BE5}.Release|Any CPU.Build.0 = Release|Any CPU
 		{1E5D535D-C21B-454B-A62E-1DF4D968E677}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
@@ -127,6 +131,10 @@ Global
 		{CCADA385-E5FB-4F08-BC50-1826BBEF9794}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{CCADA385-E5FB-4F08-BC50-1826BBEF9794}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{CCADA385-E5FB-4F08-BC50-1826BBEF9794}.Release|Any CPU.Build.0 = Release|Any CPU
+		{CA1CEF5F-1122-4D9B-B21D-3FB260335598}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{CA1CEF5F-1122-4D9B-B21D-3FB260335598}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{CA1CEF5F-1122-4D9B-B21D-3FB260335598}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{CA1CEF5F-1122-4D9B-B21D-3FB260335598}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -146,6 +154,7 @@ Global
 		{8954D8AD-051F-4B44-87A4-559C00DB1CD6} = {C68FA42C-7B20-4FE3-AED6-8B6619EE5410}
 		{A261E23F-DF9D-4ED5-8DC6-0DB6ECB06B9F} = {C68FA42C-7B20-4FE3-AED6-8B6619EE5410}
 		{04FA45B2-F2AF-4394-99F8-E50A82E91658} = {C68FA42C-7B20-4FE3-AED6-8B6619EE5410}
+		{CA1CEF5F-1122-4D9B-B21D-3FB260335598} = {C68FA42C-7B20-4FE3-AED6-8B6619EE5410}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {DDF9D949-F79B-4EA6-A766-976B0BE0BC79}