Indicates the "kind" of a truss member. 
   Namespace:   Autodesk.Revit.DB.Structure  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
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Members
| Member name | Description | 
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| ETK_Unknown | Unknown element type. | 
| ETK_TrussTopChord | Truss top chord. | 
| ETK_TrussBottomChord | Truss bottom chord. | 
| ETK_TrussVertWeb | Truss VertWeb. | 
| ETK_TrussDiagWeb | Truss DiagWeb. |