Adds Member Forces to element. 
   Namespace:   Autodesk.Revit.DB.Structure  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 16.0.0.0 (16.0.0.0) 
  Since:  2016 
Syntax
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Parameters
- start
 -  Type:  System Boolean  
Member Forces position on analytical model stick element. True for start, false for end. 
- force
 -  Type:  Autodesk.Revit.DB XYZ  
The translational forces at specified position of the element. The x value of XYZ object represents force along x-axis of the analytical model coordinate system, y along y-axis, z along z-axis respectively. 
- moment
 -  Type:  Autodesk.Revit.DB XYZ  
The rotational forces at specified position of the element. The x value of XYZ object represents moment about x-axis of the analytical model coordinate system, y about y-axis, z about z-axis respectively. 
Remarks
 If element already have member forces defined for that end, newly provided values replace current one. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL |