## Object types

- IfcProduct
  - IfcElement
    - IfcBuildingElement
      - IfcBeam
      - IfcColumn
      - IfcCovering

        CEILING
        FLOORING
        CLADDING
        ROOFING
        INSULATION
        MEMBRANE
        SLEEVING
        WRAPPING
        USERDEFINED
        NOTDEFINED

      - IfcMember
      - IfcPlate
      - IfcRailing

        HANDRAIL
        GUARDRAIL
        BALUSTRADE
        USERDEFINED
        NOTDEFINED

      - IfcStair
      - IfcStairFlight
    - IfcElementAssembly

      ACCESSORY_ASSEMBLY
      ARCH
      BEAM_GRID
      BRACED_FRAME
      GIRDER
      REINFORCEMENT_UNIT
      RIGID_FRAME
      SLAB_FIELD
      TRUSS
      USERDEFINED
      NOTDEFINED

    - IfcElementComponent
      - IfcDiscreteAccessory
      - IfcFastener
        - IfcMechanicalFastener
    - IfcFeatureElement
      - IfcFeatureElementSubtraction
        - IfcOpeningElement
  - IfcGrid
  - IfcSpatialStructureElement
    - IfcBuilding
    - IfcBuildingStorey
    - IfcSite
- IfcProject

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