Definition from buildingSMART: The abstract entity IfcStructuralItem covers structural members and structural connections. It defines the relation needed to associate structural actions to structural members and connections.
Topology Use Definition
Instances of IfcStructuralCurveMember shall have a topology representation. It includes a placement and a product representation. The IfcProductRepresentation shall be given by an item of Representations being of type "IfcTopologyRepresentation".
The preferred placement for topological representations is the placement within the world coordinate system of the project. This is provided by leaving the ObjectPlacement attribute with a NIL value. If the ObjectPlacement however is provided, all geometric entities underneath the topological representation (such as IfcVertexPoint, IfcEdgeCurve, or IfcFaceSurface) are founded within the object coordinate system established by ObjectPlacement.
HISTORY: New entity in Release IFC2x Edition 2.
|AssignedStructuralActivity||:||Inverse relationship to all structural activities (i.e. to actions or reactions) which are assigned to this structural member.|