8.15.3.3 IfcArbitraryProfileDefWithVoids

RV ⓘ

AbV ⓘ

8.15.3.3.1 Semantic definition

The IfcArbitraryProfileDefWithVoids defines an arbitrary closed two-dimensional profile with holes. It is given by an outer boundary and inner boundaries. A common usage of IfcArbitraryProfileDefWithVoids is as the cross section for the creation of swept surfaces or swept solids.

Informal Propositions

The outer curve and all inner curves shall be closed curves.
The outer curve shall enclose all inner curves.
No inner curve shall intersect with the outer curve or any other inner curve. That is, no two curves of the profile definition shall have a point or segment in common, taken into account the geometric precision factor of the geometric representation context. In other words, curves must neither cross nor touch each other.
No inner curve may enclose another inner curve.

Figure 8.15.3.3.A illustrates the arbitrary closed profile definition with voids. The OuterCurve, defined at the supertype IfcArbitraryClosedProfileDef and the inner curves are defined in the same underlying coordinate system. The common underlying coordinate system is defined by the swept area solid that uses the profile definition. It is the xy plane of:

IfcSweptAreaSolid.Position

or in case of sectioned spines the xy plane of each list member of IfcSectionedSpine.CrossSectionPositions. The OuterCurve attribute defines a two dimensional closed bounded curve, the InnerCurves define a set of two dimensional closed bounded curves.

Figure 8.15.3.3.A — Arbitrary profile with voids

8.15.3.3.2 Entity inheritance

8.15.3.3.3 Attributes

#	Attribute	Type	Description
IfcProfileDef (4)
1	ProfileType	IfcProfileTypeEnum	Defines the type of geometry into which this profile definition shall be resolved, either a curve or a surface area. In case of curve the profile should be referenced by a swept surface, in case of area the profile should be referenced by a swept area solid.
2	ProfileName	OPTIONAL IfcLabel	Human-readable name of the profile, for example according to a standard profile table. As noted above, machine-readable standardized profile designations should be provided in IfcExternalReference.ItemReference.
	HasExternalReference	SET [0:?] OF IfcExternalReferenceRelationship FOR RelatedResourceObjects	Reference to external information, e.g. library, classification, or document information, which is associated with the profile. IFC4-CHANGE New inverse attribute
	HasProperties	SET [0:?] OF IfcProfileProperties FOR ProfileDefinition	Additional properties of the profile, for example mechanical properties. IFC4-CHANGE New inverse attribute
IfcArbitraryClosedProfileDef (1)
3	OuterCurve	IfcCurve	Bounded curve, defining the outer boundaries of the arbitrary profile.
Click to show 5 hidden inherited attributes
IfcArbitraryProfileDefWithVoids (1)
4	InnerCurves	SET [1:?] OF IfcCurve	Set of bounded curves, defining the inner boundaries of the arbitrary profile.

Table 8.15.3.3.B

8.15.3.3.4 Formal propositions

Name	Description
WR1	The type of the profile shall be AREA, as it can only be involved in the definition of a swept area.
`SELF\IfcProfileDef.ProfileType = AREA`
WR2	All inner curves shall have the dimensionality of 2.
`SIZEOF(QUERY(temp <* InnerCurves \| temp.Dim <> 2)) = 0`
WR3	None of the inner curves shall by of type IfcLine, as an IfcLine can not be a closed curve.
`SIZEOF(QUERY(temp <* InnerCurves \| 'IFC4X3_DEV_738df036.IFCLINE' IN TYPEOF(temp))) = 0`

Table 8.15.3.3.C

8.15.3.3.5 Property sets

Pset_ProfileArbitraryDoubleT
- OverallWidth
- LeftFlangeWidth
- RightFlangeWidth
- OverallDepth
- FlangeDepth
- FlangeDraft
- FlangeChamfer
- FlangeBaseFillet
- FlangeTopFillet
- StemBaseWidth
- StemTopWidth
- StemBaseChamfer
- StemTopChamfer
- StemBaseFillet
- StemTopFillet
Pset_ProfileArbitraryHollowCore
- OverallWidth
- OverallDepth
- EdgeDraft
- DraftBaseOffset
- DraftSideOffset
- BaseChamfer
- KeyDepth
- KeyHeight
- KeyOffset
- BottomCover
- CoreSpacing
- CoreBaseHeight
- CoreMiddleHeight
- CoreTopHeight
- CoreBaseWidth
- CoreTopWidth
- CenterCoreSpacing
- CenterCoreBaseHeight
- CenterCoreMiddleHeight
- CenterCoreTopHeight
- CenterCoreBaseWidth
- CenterCoreTopWidth
- NumberOfCores
Pset_ProfileMechanical
- MassPerLength
- CrossSectionArea
- Perimeter
- MinimumPlateThickness
- MaximumPlateThickness
- CentreOfGravityInX
- CentreOfGravityInY
- ShearCentreZ
- ShearCentreY
- MomentOfInertiaY
- MomentOfInertiaZ
- MomentOfInertiaYZ
- TorsionalConstantX
- WarpingConstant
- ShearDeformationAreaZ
- ShearDeformationAreaY
- MaximumSectionModulusY
- MinimumSectionModulusY
- MaximumSectionModulusZ
- MinimumSectionModulusZ
- TorsionalSectionModulus
- ShearAreaZ
- ShearAreaY
- PlasticShapeFactorY
- PlasticShapeFactorZ

8.15.3.3.6 Concept usage

Concept	Usage	Description
IfcProfileDef (1)
Property Sets for Profiles	General	This concept can be applied to the following resources: Pset_ProfileMechanical
IfcArbitraryClosedProfileDef (1)
Property Sets for Profiles	General	This concept can be applied to the following resources: Pset_ProfileArbitraryDoubleT
Click to show 2 hidden inherited concepts
IfcArbitraryProfileDefWithVoids (1)
Property Sets for Profiles	General	This is a further elaboration on an inherited concept. This concept can be applied to the following resources: Pset_ProfileArbitraryHollowCore

Table 8.15.3.3.D

8.15.3.3.7 Formal representation

 ENTITY IfcArbitraryProfileDefWithVoids
 SUBTYPE OF (IfcArbitraryClosedProfileDef);
	InnerCurves : SET [1:?] OF IfcCurve;
 WHERE
	WR1 : SELF\IfcProfileDef.ProfileType = AREA;
	WR2 : SIZEOF(QUERY(temp <* InnerCurves | temp.Dim <> 2)) = 0;
	WR3 : SIZEOF(QUERY(temp <* InnerCurves | 'IFC4X3_DEV_738df036.IFCLINE' IN TYPEOF(temp))) = 0;
END_ENTITY;

8.15.3.3.8 References

IfcArbitraryClosedProfileDef

	ENTITY IfcArbitraryProfileDefWithVoids
	SUBTYPE OF (IfcArbitraryClosedProfileDef);
	InnerCurves : SET [1:?] OF IfcCurve;
	WHERE
	WR1 : SELF\IfcProfileDef.ProfileType = AREA;
	WR2 : SIZEOF(QUERY(temp <* InnerCurves \| temp.Dim <> 2)) = 0;
	WR3 : SIZEOF(QUERY(temp <* InnerCurves \| 'IFC4X3_DEV_738df036.IFCLINE' IN TYPEOF(temp))) = 0;
	END_ENTITY;