IFC 4.3.0.1 (IFC4X3_TC1)

# 7.10.3.2 IfcRelConnectsStructuralMember

## 7.10.3.2.1 Semantic definition

The entity IfcRelConnectsStructuralMember defines all needed properties describing the connection between structural members and structural connection objects (nodes or supports).

Use Definition

Point Connection Instances of the entity IfcRelConnectsStructuralMember shall be used to describe a connection between an instance of IfcStructuralPointConnection and either an instance of IfcStructuralCurveMember or IfcStructuralSurfaceMember. The RelatedStructuralConnection for point connections has to be of type IfcStructuralPointConnection.

Curve Connection Instances of the entity IfcRelConnectsStructuralMember shall be used to describe a connection between an instance of IfcStructuralCurveConnection and an instance of either IfcStructuralCurveMember or IfcStructuralSurfaceMember. The RelatedStructuralConnection for curve connections has to be of type IfcStructuralCurveConnection.

Surface Connection Instances of the entity IfcRelConnectsStructuralMember shall be used to describe a connection between an instance of IfcStructuralSurfaceConnection and an instance of IfcStructuralSurfaceMember. The RelatedStructuralConnection for curve connections has to be of type IfcStructuralSurfaceConnection.

Coordinate System for Applied Conditions All values defined by AppliedCondition or AdditionalConditions are given within the coordinate system provided by ConditionCoordinateSystem, which is defined relative to the local coordinate system of the structural member. If the ConditionCoordinateSystem is not defined, the local coordinate system of the structural member is used instead.

Supported Length Optionally a supported length can be given, which specifies the length (or width) of the physical connection along a curve connection.

Figure 7.10.3.2.A illustrates the appropriate definition of support lengths.

## 7.10.3.2.5 Formal representation

ENTITY IfcRelConnectsStructuralMember
SUPERTYPE OF (ONEOF
(IfcRelConnectsWithEccentricity))
SUBTYPE OF (IfcRelConnects);
RelatingStructuralMember : IfcStructuralMember;
RelatedStructuralConnection : IfcStructuralConnection;
AppliedCondition : OPTIONAL IfcBoundaryCondition;
END_ENTITY;