Returns thickness of flange measured in the 0.5 * (width - webThickess),
sometimes used for sections with width > 300 mm.
Namespace: Autodesk.Revit.DB.Structure.StructuralSectionsAssembly: RevitAPI (in RevitAPI.dll) Version: 20.0.0.0 (20.0.0.377)
Since: 2018