E.5.1 Beam standard case

The IfcBeamStandardCase is a standard case element to exchange parametric definitions of the beam shape.

The example includes the local placement, the body shape representation, the material profile set assignment, the beam occurrence and beam type definitions. The focus points are the use of cardinal points to align the beam profile to the axis, the use of parametric profile definitions and the assignment of material information to the profile.


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The example in Figure E11 declares two parametric beam types, one with an I-Shape profile and the other with a T-Shape profile. Each type has nine occurrences, using various cardinal points to align the profiles.

Figure E11 — Beam occurrences


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The beam 'A-9' in Figure E12 is an occurrence of the 'IPE220' type having an I-Shape profile, placed along an axis using the upper-right cardinal point.

The cardinal point of the beam 'A-9' is set to the upper-right, indicating that the 'Body' representation should be generated with the upper-right of the profile aligned along the curve of the 'Axis representation.

Figure E12 — Beam profile and cardinal point usage



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The 'IPE220' beam type in Figure E13 is represented by IfcBeamType. As a parametric definition, this beam type does not have any geometric representation, rather it has a material profile set association indicating a cross-section which may be applied to paths defined at occurrences.

Figure E13 — Beam type graph


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Each beam occurrence as in Figure E14 is represented by IfcBeamStandardCase. The IfcMaterialProfileSetUsage entity indicates the alignment of the material profile set according to cardinal point. The IfcMaterialProfileSet indicates a single material profile. The IfcMaterialProfile indicates an I-Shape cross-section of steel. The IfcIShapeProfileDef indicates shape parameters of the I-Shape profile. The IfcMaterial indicates the steel material, which could be further elaborated with structural properties, surface styles, and fill area styles.

Figure E14 — Beam occurrence graph


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