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#CV-2x3-182

Agreement to clarify the export of a Building Storey and its local placement
number CV-2x3-182
based on IFC2x3
effects IFC2x3 coordination view 2.0
date Sep 2013
initiator official buildingSMART certification 2.0 program
summary Agreement to clarify the export of a Building Storey and its local placement

 

Description

 

There are two ways in IFC to express the storey elevation:

  1. by IfcBuildingStorey.Elevation
  2. by the z-Value of the IfcLocalPlacement of IfcBuildingStorey

 

It is hereby agreed, that:

  • The value of IfcBuildingStorey.Elevation should be the same as the Z value of the local placement of the IfcBuildingStorey, so they are redundant (or it should be omitted).
  • The Z value of the local placement of the IfcBuildingStorey is the preferred method of locating the building storey and its associated elements
  • The value of the IfcBuildingStorey.Elevation shall not be used within geometric positioning.