The minimum yield stress of the asset. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2013 
Syntax
Remarks
 Applies to Metal-based and generic structural assets. The value is in Newtons per foot meter (N/(ft · m)). 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions InapplicableDataException | When setting this property: the material type must be Metal or generic to set this property. |