IFC 4.3.0.1 (IFC4X3) development

# 5.4.3.51 IfcRelConnectsWithRealizingElements

## 5.4.3.51.1 Semantic definition

IfcRelConnectsWithRealizingElements defines a generic relationship that is made between two elements that require the realization of that relationship by means of further realizing elements.

An IfcRelConnectsWithRealizingElements is a specialization of IfcRelConnectsElement where the connecting operation has the additional attribute of (one or many) realizing elements that may be used to realize or further qualify the relationship. It is defined as a ternary relationship.

The connection types for bridges include:

• TrussJoint: Joint between truss members.
• ExpansionJoint: Joint allowing movement, usually due to thermal expansion difference in structures, with DiscreteAccessory of type EXPANSION_JOINT_DEVICE as RealizingElement.
• EmbeddedPartsJoint: Joint for auxiliary parts to structure, with appropriate RealizingElements, such as DiscreteAccessories of type ANCHORPLATE, BRACKET or SHOE.
• ConstructionJoint: Joint for phasing of construction, typically in in-situ concrete structures.

## 5.4.3.51.5 Formal representation

ENTITY IfcRelConnectsWithRealizingElements
SUBTYPE OF (IfcRelConnectsElements);
RealizingElements : SET [1:?] OF IfcElement;
ConnectionType : OPTIONAL IfcLabel;
END_ENTITY;