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#CV-2x3-144

roofs are aggregates and shall have at least one contained element and no own geometry
number
CV-2x3-144
based on
IFC2x3
effects
extended coordination view
date
26. Feb 2008
initiator
ISG meeting in Prague
summary roofs are aggregates and shall have at least one contained element and no own geometry

 

Description


update 2012-02-06:
This implementer agreement has been withdrawn with immediate effect. The IFC2x3 Coordination View 2.0 compliant applications shall support the import of IfcRoof with own geometric representation and without components.

This is to unify the requirements (e.g. to equally apply to also IfcCurtainWall, IfcStair, IfcRamp. etc.

 

Outdated agreement

The IfcRoof should only be exported as an aggregate without having an own geometric representation. As a minimum, one contained element shall be included having the geometric representation. This would normally be an IfcSlab with PredefinedType=ROOF.