Return structural section from element. 
   Namespace:   Autodesk.Revit.DB.Structure.StructuralSections  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 18.0.0.0 (18.2.0.0) 
  Since:  2015 
Syntax
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| Visual Basic | 
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Parameters
- document
-  Type:  Autodesk.Revit.DB Document  
 The document that owns the family for beam, brace or structural column.
- elementId
-  Type:  Autodesk.Revit.DB ElementId  
 ID of family symbol or family instance for beam, brace or structural column.
Return Value
Structural section returned if element have one. For elements that do not have structural section or can not have structural section a null reference ( Nothing in Visual Basic) will be returned.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 |