The position of the run relative to the Up-direction path used to create the run. 
   Namespace:   Autodesk.Revit.DB.Architecture  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2013 
Syntax
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Members
| Member name | Description | 
|---|---|
| Left | The creation path for the run is the left edge. | 
| Center | The creation path for the run is the center. | 
| Right | The creation path for the run is the right edge. | 
| LeftExterior | The creation path for the run is the left stringer exterior edge. | 
| RightExterior | The creation path for the run is the right stringer exterior edge. |