IFC building model
Schema: "IFC4"
Description: "ViewDefinition[DesignTransferView]"
File name: "cavity_wall_roundtrip.ifc"
Time stamp: "2022-02-24T15:03:56+01:00"
Preprocessor: "IfcOpenShell v0.7.0-4c40fc16"
Originating system: "BlenderBIM 0.0.220130"
Authorization: "Nobody"

Units
  VOLUMEUNIT: CUBIC_METRE
  LENGTHUNIT: METRE
  AREAUNIT: SQUARE_METRE

Spatial structure
IFCPROJECT "My Project"
  IFCSITE "My Site"
    IFCBUILDING "My Building"
      IFCBUILDINGSTOREY "My Storey"
        contains 3 elements
          2 x IFCWALL | ELEMENTEDWALL | names: "outer_wall", "inside_wall" | material: "brick"; "concrete"
          1 x IFCCOVERING | CEILING | names: "insulation" | material: "insulation"