OptionalCutLength of the cut through the host (metres). Defaults to the host's body thickness + 2 × 50 mm.
Size along the slab's local Y (metres).
OptionalDescriptionOptionalGlobalExplicit GlobalId (22-char IFC GUID); generated when omitted.
OptionalNameOptionalObjectCentre of the opening in the slab's local XY (metres).
OptionalTagSize along the slab's local X (metres).
Opening in a slab, in the slab's own placement frame.