How to reference IfcSlab with IfcRelSpaceBoundary

Anonymous — Tue, 04 Apr 2017 00:49:41 GMT

Hi everybody,

Currently we are exporting to IFC data format at Archicad 20.

I want to output building elements (wall, slab, ceiling etc.) to IfcRelSpaceBoundary.

However, in many cases walls are output, but slabs and ceilings are not output.

For example in the case of a wall:
#4975= IFCRELSPACEBOUNDARY('2ox4HtFW6nXG6ZLzYkPfU',#12,'2ndLevel','2a',#3968,#3416,#4974,.PHYSICAL.,.EXTERNAL.);
cf. #3416= IFCWALL('32loDhHcb03BZV_ncq97lac',#12,'W4',$,$,#2715,#3411,'C2BF236B-4669-400C-B8DF-FB19B4247BE6');

In case of slab (seems to be) as follows:
#4830= IFCRELSPACEBOUNDARY('3B0YAjbu5yCr0xJIqEYZT2',#12,'2ndLevel','2a',#3968,$,#4829,.VIRTUAL.,.EXTERNAL.);

As for what it is, in the case of slab (it seems) "$" is output to RelatedBuildingElement.

Although the zone is indeed in contact with the slab, I am in trouble not to be referred.

What can be read from the example above is thought to be one of the reasons that PhysicalOrVirtualBoundary is "Virtual", but I do not know how to change it to "Physical".

I am reading the following site.
http://www.buildingsmart-tech.org/ifc/IFC2x3/TC1/html/ifcproductextension/lexical/ifcrelspaceboundary.htm

I would like to refer to slab and ceiling from IfcRelSpaceBoundary as well as wall.

Give me something good advice.

topic How to reference IfcSlab with IfcRelSpaceBoundary in Collaboration with other software

How to reference IfcSlab with IfcRelSpaceBoundary