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#CV-2x3-136

agreement on exporting the construction type
number
CV-06-136
based on
IFC2x3
effects
extended coordination view
date
13. Mar 2007
initiator
ISG meeting in Waltham
summary agreement on exporting the construction type

 

Description

The construction type is an essential information for many downstream applications, e.g. for quantity take-off, energy calculation, etc. It identify the category or classification of an element type. E.g. all single layer hollow masonary walls with thickness 240mm may have the construction type "HLZ 240".

If such an information is available within the sending application, it should be exported in a consistent way. The agreement is:

  • for application handling occurrence objects only (in general. or for certain building elements) it should be exported as property "Reference" being part of the common property set, e.g. Pset_WallCommon.Reference
  • for application handling type objects (at least for some building elements) it should be exported as Name attribute of the type object, e.g. IfcWallType.Name

 

If both information is present, the construction type assigned to the occurrence shall override the construction type assigned to the type.