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).
NOTE Another eccentricity model is available independently of eccentric connection specification: The section profile of a curve member may be inserted eccentrically with respect to the member's reference curve, see definitions at IfcStructuralCurveMember. Whether one or the other or both eccentricity models may be used is subject to information requirements and local agreements.
HISTORY New entity in IFC2x3.
IFC4 CHANGE Use definitions changed to always require two topology items.
|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, |
> NOTE only the last modification in stored - either as addition, deletion or modification.
> IFC4 CHANGE The attribute has been changed to be OPTIONAL.
|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.|
|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.|
|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).|
IfcRoot assigns the globally unique ID. In addition it may provide for a name and a description about the concept.
Ownership, history, and merge state is captured using IfcOwnerHistory.
ENTITY IfcRelConnectsWithEccentricity SUBTYPE OF (IfcRelConnectsStructuralMember); ConnectionConstraint : IfcConnectionGeometry; END_ENTITY;