4.8.2.3.2 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:

• IfcShapeRepresentation.RepresentationIdentifier = 'Axis'
• IfcShapeRepresentation.RepresentationType : 'Curve3D'
• IfcShapeRepresentation.Items = IfcBoundedCurve

Figure 66 illustrates an instance diagram.

Figure 66 — Axis 3D Geometry

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