Returns one or more properties for legacy (created in R2012 or before) Stairs. 
   Namespace:   Autodesk.Revit.DB.IFC  
  Assembly:   RevitAPIIFC  (in RevitAPIIFC.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2013 
Syntax
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Parameters
- exporterIFC
 -  Type:  Autodesk.Revit.DB.IFC ExporterIFC  
The exporter. 
- pElement
 -  Type:  Autodesk.Revit.DB Element  
the legacy stair. 
- pNumRisers
 -  Type:  System Int32   %  
Number of Risers in the Stair. 
- pNumTreads
 -  Type:  System Int32   %  
Number of Treads in the Stair. 
- pRiserHeight
 -  Type:  System Double   %  
Riser Height of the risers in the Stair. 
- pTreadLength
 -  Type:  System Double   %  
Tread length of the treads in the Stair. 
- pMinTreadLength
 -  Type:  System Double   %  
Minimum Tread length of the treads in the Stair. 
- pNosingLength
 -  Type:  System Double   %  
Nosing length of the treads in the Stair. 
- pWaistThickness
 -  Type:  System Double   %  
Waist thickness of the flight of stair. 
Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL |