The number of balusters per tread. 
   Namespace:   Autodesk.Revit.DB.Architecture  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 19.0.0.0 (19.0.0.405) 
  Since:  2019 
Syntax
Remarks
 Applicable only if UseBalusterPerTreadOnStairs is true. 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentOutOfRangeException | When setting this property: The given value for balusterPerTreadNumber is not positive. |