IfcStructuralItem

Definition from IAI: 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".

Local Placement

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.

EXPRESS specification:

ENTITY IfcStructuralItem

ABSTRACT SUPERTYPE OF

(ONEOF(IfcStructuralMember, IfcStructuralConnection))

SUBTYPE OF (

IfcProduct);

INVERSE

AssignedStructuralActivity

SET OF IfcRelConnectsStructuralActivity FOR RelatingElement;

END_ENTITY;

Attribute definitions:

AssignedStructuralActivity

Inverse relationship to all structural activities (i.e. to actions or reactions) which are assigned to this structural member.

Inheritance graph

ENTITY IfcStructuralItem;

ENTITY IfcRoot;

GlobalId

IfcGloballyUniqueId;

OwnerHistory

IfcOwnerHistory;

Name

OPTIONAL IfcLabel;

Description

OPTIONAL IfcText;

ENTITY IfcObjectDefinition;

INVERSE

HasAssignments

SET OF IfcRelAssigns FOR RelatedObjects;

IsDecomposedBy

SET OF IfcRelDecomposes FOR RelatingObject;

Decomposes

SET [0:1] OF IfcRelDecomposes FOR RelatedObjects;

HasAssociations

SET OF IfcRelAssociates FOR RelatedObjects;

ENTITY IfcObject;

ObjectType

OPTIONAL IfcLabel;

INVERSE

IsDefinedBy

SET OF IfcRelDefines FOR RelatedObjects;

ENTITY IfcProduct;

ObjectPlacement

OPTIONAL IfcObjectPlacement;

Representation

OPTIONAL IfcProductRepresentation;

INVERSE

ReferencedBy

SET OF IfcRelAssignsToProduct FOR RelatingProduct;

ENTITY IfcStructuralItem;

INVERSE

AssignedStructuralActivity

SET OF IfcRelConnectsStructuralActivity FOR RelatingElement;

END_ENTITY;