Set structural section in element. 
   Namespace:   Autodesk.Revit.DB.Structure.StructuralSections  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 16.0.0.0 (16.0.0.0) 
  Since:  2015 
Syntax
| C# | 
|---|
|  | 
| Visual Basic | 
|---|
|  | 
| Visual C++ | 
|---|
|  | 
Parameters
- document
-  Type:  Autodesk.Revit.DB Document  
 The document that owns the family for beam, brace or structural column.
- familySymbolId
-  Type:  Autodesk.Revit.DB ElementId  
 ID of family symbol for beam, brace or structural column.
- structuralSection
-  Type:  Autodesk.Revit.DB.Structure.StructuralSections StructuralSection  
 Structural section with values that will be set.
Return Value
True is returned when requested shape with values was properly set. Return false otherwise.Remarks
 Only beams, braces and structural columns can have structural section associated with it. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL |