After #217, 256/338 emitted building elements are contained in a specific IfcBuildingStorey via record base elevation. The remaining 82 (64 plan-loop IFCSLAB, 18 IFCSPACE) come from paths without a record bbox, so they fall back to the unbound container. #212's slab identity work (record-backed slabs) is the natural fix for the 64; spaces need their own record source.
After #217, 256/338 emitted building elements are contained in a specific IfcBuildingStorey via record base elevation. The remaining 82 (64 plan-loop IFCSLAB, 18 IFCSPACE) come from paths without a record bbox, so they fall back to the unbound container. #212's slab identity work (record-backed slabs) is the natural fix for the 64; spaces need their own record source.