Defined in File Ifc4x3_rc1.h
Definition from IAI: This type definition shall be used to
distinguish between different types of structural surface members, such as the
typical mechanical function of walls, slabs and shells.
BENDING_ELEMENT: A member with capacity to carry out-of-plane loads, i.e. a plate. MEMBRANE_ELEMENT: A member with capacity to carry in-plane loads, for example a shear wall. SHELL: A member with capacity to carry in-plane and out-of-plane loads, i.e. a combination of bending element and membrane element. USERDEFINED: A specially defined member. NOTDEFINED: A member without further categorization.
HISTORY New type in IFC 2x2. IFC 2x4 change: Renamed from IfcStructuralSurfaceTypeEnum.