Splits a roof or floor element composed of planar surfaces into a set of roughly vertical extruded loops of uniform depth if possible. 
   Namespace:   Autodesk.Revit.DB.IFC  
  Assembly:   RevitAPIIFC  (in RevitAPIIFC.dll) Version: 16.0.0.0 (16.0.0.0) 
  Since:  2016 
Syntax
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Parameters
- roofOrFloor
 -  Type:  Autodesk.Revit.DB HostObject  
The roof or floor. 
Return Value
A collection of computed components.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentException | The host object roofOrFloor must be a floor or a non face-based roof. | 
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL | 
| Autodesk.Revit.Exceptions InvalidOperationException | The roof or floor cannot be split into subcomponents by this routine. Possible reasons are, among others: (1) the roof or floor contains non-planar surfaces, (2) the roof or floor cannot be divided into sub-components of equal thickness, or (3) the roof subcomponents contain inner boundary loops. |