Id of the parameter driving the multiplanar depth. The depth is measured center-to-center of the bar. A valid shape parameter must be assigned to DepthParamId before the MultiplanarDefinition can be used in RebarShape creation. 
   Namespace:   Autodesk.Revit.DB.Structure  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | When setting this property: A non-optional argument was NULL |