Returns the mass subcategory ElementId used for ConceptualSurfaceType for this MassSurfaceData.
Namespace: Autodesk.Revit.DB.AnalysisAssembly: RevitAPI (in RevitAPI.dll) Version: 20.0.0.0 (20.0.0.377)
Since: 2012
Syntax
Remarks
This value is determined by starting with the subcategory property and adjusting it according to properties
such as "isSlab" or "isUnderground".