IFC (IFC4X3_ADD2) under development IfcRelConnectsWithEccentricity Semantic definition

The entity IfcRelConnectsWithEccentricity adds the definition of eccentricity to the connection between a structural member and a structural connection (representing either a node or support).

Use Definition

Point Connection ConnectionConstraint shall be of type IfcConnectionPointGeometry and shall refer to two instances of IfcVertexPoint.

Curve Connection ConnectionConstraint shall be of type IfcConnectionCurveGeometry and shall refer to two instances of IfcEdge or subtypes.

Surface Connection ConnectionConstraint shall be of type IfcConnectionSurfaceGeometry and shall refer to two instances of IfcFaceSurface. Entity inheritance Attributes

# Attribute Type Description
IfcRoot (4)
1 GlobalId IfcGloballyUniqueId

Assignment of a globally unique identifier within the entire software world.

2 OwnerHistory OPTIONAL IfcOwnerHistory

Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object,

3 Name OPTIONAL IfcLabel

Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule.

4 Description OPTIONAL IfcText

Optional description, provided for exchanging informative comments.

IfcRelConnectsStructuralMember (6)
5 RelatingStructuralMember IfcStructuralMember

Reference to an instance of IfcStructuralMember (or its subclasses) which is connected to the specified structural connection.

6 RelatedStructuralConnection IfcStructuralConnection

Reference to an instance of IfcStructuralConnection (or its subclasses) which is connected to the specified structural member.

7 AppliedCondition OPTIONAL IfcBoundaryCondition

Conditions which define the connections properties. Connection conditions are often called "release" but are not only used to define mechanisms like hinges but also rigid, elastic, and other conditions.

8 AdditionalConditions OPTIONAL IfcStructuralConnectionCondition

Describes additional connection properties.

9 SupportedLength OPTIONAL IfcLengthMeasure

Defines the 'supported length' of this structural connection. See Fig. for more detail.

10 ConditionCoordinateSystem OPTIONAL IfcAxis2Placement3D

Defines a coordinate system used for the description of the connection properties in ConnectionCondition relative to the local coordinate system of RelatingStructuralMember. If left unspecified, the placement IfcAxis2Placement3D((x,y,z), ?, ?) is implied with x,y,z being the local member coordinates where the connection is made and the default axes directions being in parallel with the local axes of RelatingStructuralMember.

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IfcRelConnectsWithEccentricity (1)
11 ConnectionConstraint IfcConnectionGeometry

The connection constraint explicitly states the eccentricity between a structural member and a structural connection by means of two topological objects (vertex and vertex, or edge and edge, or face and face).

Table Concept usage

Concept Usage Description
IfcRoot (2)
Revision Control General

Ownership, history, and merge state is captured using IfcOwnerHistory.

Software Identity General

IfcRoot assigns the globally unique ID. In addition it may provide for a name and a description about the concept.

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Table Formal representation

ENTITY IfcRelConnectsWithEccentricity
 SUBTYPE OF (IfcRelConnectsStructuralMember);
	ConnectionConstraint : IfcConnectionGeometry;
END_ENTITY; References

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