IFC 4.3.0.1 (IFC4X3_TC1)

# 8.10.3.14 IfcMaterialProfileSetUsageTapering

## 8.10.3.14.1 Semantic definition

IfcMaterialProfileSetUsageTapering specifies dual material profile sets in association with tapered prismatic (beam- or column-like) elements.

Usage with tapered building elements

The inherited attribute ForProfileSet specifies the profile and material at the start of the member, ForProfileEndSet at its end. Start and end correspond to the extrusion direction in the shape model of the shape representation of the element or element type.

Both material profile sets should refer to the same material, that is, only differ with respect to their profiles.

Usage with structural analysis curve members

IfcMaterialProfileSetUsageTapering may be used with the structural analysis idealization (IfcStructuralCurveMember) of uniform members as well as of tapered members.

In case of uniform members, ForProfileSet and ForProfileEndSet refer to the same material profile set. In case of tapered members, ForProfileSet specifies the profile and material at the start of the member, ForProfileEndSet at its end. Start and end correspond to the edge direction in the topological representation of the curve member.

## 8.10.3.14.4 Formal representation

ENTITY IfcMaterialProfileSetUsageTapering
SUBTYPE OF (IfcMaterialProfileSetUsage);
ForProfileEndSet : IfcMaterialProfileSet;
CardinalEndPoint : OPTIONAL IfcCardinalPointReference;
END_ENTITY;

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