CV-2x3-150 [aka CV-06-150]

Agreement on how to split an opening between two walls (e.g. in a staircase) 

Based on          IFC2x3

Initiator            ISG Meeting-Amsterdam

Effects              Extended Coordination View

Date                    2008 06 24

Description:

 If an opening is inserted into two walls that join vertically, as in a staircase, the following transformations have to be made for IFC export:

    * the opening is split into two openings, each of them is assigned to one wall - the IFC export has 2 instances of IfcOpeningElement

    * if the opening has a window as the filling, the whole window is assigned to one opening (not split), usually the lower opening - the IFC export has 1 instance of IfcWindow

        - NOTE: In case of parametric definition of the window shape, the IfcWindow has to have an IfcShapeRepresentation, with RepresentationIdentifier = "Profile" (since the profile of the window is not equal to the profile of the opening. See also CV-2x3-103


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