IFC 4.3.0.0 (IFC4X3) final

4.8.1.3.2 Axis 3D Geometry

The 'Axis' representation using 'Curve3D' representation type is predominately used to align material profile sets to geometric representations of standard beams, columns, members, pipes, ducts and other longitudinal elements.

The following attribute values for the IfcShapeRepresentation holding this geometric representation shall be used:

The following diagram shows the generic classes and relationships used when applying this concept. In addition, concepts may have particular importance to common or standardised industry practices and scenarios. For these specific usage scenarios, the tables below shows a recommended list of general usage patterns that users may adopt.

G IfcProduct IfcProduct GlobalId [1:1] OwnerHistory [0:1] Name [0:1] Description [0:1] HasAssignments [0:?] Nests [0:1] IsNestedBy [0:?] HasContext [0:1] IsDecomposedBy [0:?] Decomposes [0:1] HasAssociations [0:?] ObjectType [0:1] IsDeclaredBy [0:1] Declares [0:?] IsTypedBy [0:1] IsDefinedBy [0:?] ObjectPlacement [0:1] Representation [0:1] ReferencedBy [0:?] PositionedRelativeTo [0:?] ReferencedInStructures [0:?] IfcProductDefinitionShape IfcProductDefinitionShape Name [0:1] Description [0:1] Representations [1:?] ShapeOfProduct [1:?] HasShapeAspects [0:?] IfcProduct:Representation1->IfcProductDefinitionShape:IfcProductDefinitionShape0 IfcShapeRepresentation IfcShapeRepresentation ContextOfItems [1:1] Identifier RepresentationIdentifier [0:1] Type RepresentationType [0:1] Items Items [1:?] RepresentationMap [0:1] LayerAssignments [0:?] OfProductRepresentation [0:?] OfShapeAspect [0:1] IfcProductDefinitionShape:Representations1->IfcShapeRepresentation:IfcShapeRepresentation0 IfcGeometricRepresentationContext IfcGeometricRepresentationContext ContextIdentifier [0:1] ContextType [0:1] RepresentationsInContext [0:?] CoordinateSpaceDimension [1:1] Precision [0:1] WorldCoordinateSystem [1:1] TrueNorth [0:1] HasSubContexts [0:?] HasCoordinateOperation [0:1] IfcShapeRepresentation:ContextOfItems1->IfcGeometricRepresentationContext:IfcGeometricRepresentationContext0 IfcLabel_0 IfcLabel IfcShapeRepresentation:RepresentationIdentifier1->IfcLabel_0:IfcLabel0 IfcLabel_1 IfcLabel IfcShapeRepresentation:RepresentationType1->IfcLabel_1:IfcLabel0 IfcBoundedCurve IfcBoundedCurve LayerAssignment [0:1] StyledByItem [0:1] IfcShapeRepresentation:Items1->IfcBoundedCurve:IfcBoundedCurve0 constraint_0 =Axis IfcLabel_0->constraint_0 constraint_1 =Curve3D IfcLabel_1->constraint_1
Figure 4.8.1.3.2.A

General Usage

ApplicableEntity
IfcBeam
IfcColumn
IfcMember
Table 4.8.1.3.2.B