Stairs   |  
 The base elevation of the stairs run. 
 Namespace: Autodesk.Revit.DB.Architecture
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)
| Exception | Condition | 
|---|---|
| ArgumentOutOfRangeException | When setting this property: The given value for baseElevation must be no more than 30000 feet in absolute value. -or- When setting this property: The baseElevation doesn't meet the restriction that bottom of run should not be lower than bottom of stairs. -or- When setting this property: The baseElevation doesn't meet the minimal height restriction of the stairs run. -or- When setting this property: The baseElevation impacts the top elevation which is less than extension below base. | 
 The base elevation has following restrictions: 
 - The base elevation is relative to the base elevation of the stairs to which the stairs run belongs.
 - When setting this property the value will be rounded automatically to a multiple of the riser height.
 - When setting this property for common run, the run's height will change according to the new base/top elevation. So the value must be less than the top elevation to keep run valid.
 - When setting this property for sketched run, whose height is fixed, the run's top elevation will be adjusted to keep the same run height.