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7.10.3.27 IfcStructuralSurfaceMemberVarying

7.10.3.27.1 Semantic definition

This entity describes surface members with varying section properties. The properties are provided by means of Pset_StructuralSurfaceMemberVaryingThickness via IfcRelDefinesByProperties, or by means of aggregation: An instance of IfcStructuralSurfaceMemberVarying may be composed of two or more instances of IfcStructuralSurfaceMember with differing section properties. These subordinate members relate to the instance of IfcStructuralSurfaceMemberVarying by IfcRelAggregates.

*Coordinate Systems*:

See definitions at IfcStructuralItem and IfcStructuralSurfaceMember. The local coordinates of an aggregate are generally undefined since continuity of local coordinates of the parts is not ensured.

*Material Use Definition*

In case of aggregation, only the individual parts (direct instances of IfcStructuralSurfaceMember) carry material and thickness information. Otherwise, definitions at IfcStructuralSurfaceMember apply.

7.10.3.27.2 Entity inheritance

7.10.3.27.3 Attributes

# Attribute Type Description
IfcRoot (4)
IfcObjectDefinition (7)
IfcObject (5)
IfcProduct (5)
IfcStructuralItem (1)
IfcStructuralMember (1)
Click to show 23 hidden inherited attributes
IfcStructuralSurfaceMember (2)
8 PredefinedType IfcStructuralSurfaceMemberTypeEnum

Type of member with respect to its load carrying behavior in this analysis idealization.

9 Thickness OPTIONAL IfcPositiveLengthMeasure

Defines the typically understood thickness of the structural surface member, measured normal to its reference surface.

Table 7.10.3.27.A

7.10.3.27.4 Property sets

  • Pset_Risk
    • RiskName
    • RiskType
    • NatureOfRisk
    • RiskAssessmentMethodology
    • UnmitigatedRiskLikelihood
    • UnmitigatedRiskConsequence
    • UnmitigatedRiskSignificance
    • MitigationPlanned
    • MitigatedRiskLikelihood
    • MitigatedRiskConsequence
    • MitigatedRiskSignificance
    • MitigationProposed
    • AssociatedProduct
    • AssociatedActivity
    • AssociatedLocation
  • Pset_StructuralSurfaceMemberVaryingThickness
    • Thickness1
    • Location1Local
    • Location1Global
    • Thickness2
    • Location2Local
    • Location2Global
    • Thickness3
    • Location3Local
    • Location3Global
  • Pset_Tolerance
    • ToleranceDescription
    • ToleranceBasis
    • OverallTolerance
    • HorizontalTolerance
    • OrthogonalTolerance
    • VerticalTolerance
    • PlanarFlatness
    • HorizontalFlatness
    • ElevationalFlatness
    • SideFlatness
    • OverallOrthogonality
    • HorizontalOrthogonality
    • OrthogonalOrthogonality
    • VerticalOrthogonality
    • OverallStraightness
    • HorizontalStraightness
    • OrthogonalStraightness
    • VerticalStraightness
  • Pset_Uncertainty
    • UncertaintyBasis
    • UncertaintyDescription
    • HorizontalUncertainty
    • LinearUncertainty
    • OrthogonalUncertainty
    • VerticalUncertainty
  • Qto_BodyGeometryValidation
    • GrossSurfaceArea
    • NetSurfaceArea
    • GrossVolume
    • NetVolume
    • SurfaceGenusBeforeFeatures
    • SurfaceGenusAfterFeatures

7.10.3.27.5 Concept usage

Concept Usage Description
IfcRoot (2)
IfcObjectDefinition (9)
IfcObject (5)
IfcProduct (18)
IfcStructuralSurfaceMember (3)
Click to show 37 hidden inherited concepts
IfcStructuralSurfaceMemberVarying (1)
Property Sets for Objects General

This concept can be applied to the following resources:

Table 7.10.3.27.B

7.10.3.27.6 Formal representation

ENTITY IfcStructuralSurfaceMemberVarying
SUBTYPE OF (IfcStructuralSurfaceMember);
END_ENTITY;

7.10.3.27.7 References

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7.10.3.27.8 Changelog

7.10.3.27.8.1 IFC4

  • attribute, SubsequentThickness
  • attribute, VaryingThicknessLocation
  • where rule, WR61
  • where rule, WR62
  • where rule, WR63