IFC Export - Decompose composites to its skins

[Johan Stinckens]

When exporting an IFC to use for Information Takeoff (Solibri) I would like to have all composites decomposed to their skins, preserving their materials and the ID of the composite they belong to.

I have tried several combinations with either BREP or not, but can't seem to produce what is needed.

When selecting a wall I should not get the whole component, consisting of 3 decompose (forward) elements, but I should have three seperate objects.

I know I can select them seperately (Shift-click) in Solibri, but I need them to actually be seperated, retaining the name information from its "parent" and the material from itself.

IFC-Export_Decompose

[stefan]

In IFC, the length of a wall is defined as: Total nominal length of the wall along the wall center line (even if different to the wall path).

https://standards.buildingsmart.org/IFC/RELEASE/IFC4/ADD2_TC1/HTML/link/qto_wallbasequantities.htm 

[Mats_Knutsson]

This is something i'm really interested in solving. I want to separate the facade skin from the other skins so that I can use simplebim location editor and connect quantities of the interior part of the wall with the "room volume" for quantity take-off.