8.15.3.1 IfcArbitraryClosedProfileDef

RV ⓘ

AbV ⓘ

8.15.3.1.1 Semantic definition

The closed profile IfcArbitraryClosedProfileDef defines an arbitrary two-dimensional profile for the use within the swept surface geometry, the swept area solid or a sectioned spine. It is given by an outer boundary from which the surface or solid can be constructed.

Informal Propositions

The OuterCurve has to be a closed curve.
The OuterCurve shall not intersect.

Figure 8.15.3.1.A illustrates the arbitrary closed profile definition. The OuterCurve is defined in the underlying coordinate system. The underlying coordinate system is defined by the swept surface or swept area solid that uses the profile definition. It is the xy plane of either:

IfcSweptSurface.Position
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.

Figure 8.15.3.1.A — Arbitrary closed profile

8.15.3.1.2 Entity inheritance

8.15.3.1.3 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
Click to show 4 hidden inherited attributes Click to hide 4 inherited attributes
IfcArbitraryClosedProfileDef (1)
3	OuterCurve	IfcCurve	Bounded curve, defining the outer boundaries of the arbitrary profile.

Table 8.15.3.1.J

8.15.3.1.4 Formal propositions

Name	Description
WR1	The curve used for the outer curve definition shall have the dimensionality of 2.
`OuterCurve.Dim = 2`
WR2	The outer curve shall not be of type IfcLine as IfcLine is not a closed curve.
`NOT('IFC4X3_DEV_7e95fe8.IFCLINE' IN TYPEOF(OuterCurve))`
WR3	The outer curve shall not be of type IfcOffsetCurve2D as it should not be defined as an offset of another curve.
`NOT('IFC4X3_DEV_7e95fe8.IFCOFFSETCURVE2D' IN TYPEOF(OuterCurve))`

Table 8.15.3.1.K

8.15.3.1.5 Property sets

Pset_ProfileArbitraryDoubleT
- OverallWidth
- LeftFlangeWidth
- RightFlangeWidth
- OverallDepth
- FlangeDepth
- FlangeDraft
- FlangeChamfer
- FlangeBaseFillet
- FlangeTopFillet
- StemBaseWidth
- StemTopWidth
- StemBaseChamfer
- StemTopChamfer
- StemBaseFillet
- StemTopFillet
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

8.15.3.1.6 Concept usage

Concept	Usage	Description
IfcProfileDef (1)
Property Sets for Profiles	General	This concept can be applied to the following resources: Pset_ProfileMechanical
Click to show 1 hidden inherited concepts Click to hide 1 inherited concepts
IfcArbitraryClosedProfileDef (1)
Property Sets for Profiles	General	This concept can be applied to the following resources: Pset_ProfileArbitraryDoubleT

Table 8.15.3.1.L

8.15.3.1.7 Examples

Figure 8.15.3.1.B

Curve Parameters In Degrees
Figure 8.15.3.1.C

Slab Openings
Figure 8.15.3.1.D

Fixed Reference Swept Area Solid
Figure 8.15.3.1.E

Sectioned Solid Horizontal
Figure 8.15.3.1.F

Curve Parameters In Radians
Figure 8.15.3.1.G

Construction Scheduling Task
Figure 8.15.3.1.H

Beam Extruded Solid
Figure 8.15.3.1.I

Slab Extrusion

8.15.3.1.8 Formal representation

ENTITY IfcArbitraryClosedProfileDef
 SUPERTYPE OF (ONEOF
	(IfcArbitraryProfileDefWithVoids))
 SUBTYPE OF (IfcProfileDef);
	OuterCurve : IfcCurve;
 WHERE
	WR1 : OuterCurve.Dim = 2;
	WR2 : NOT('IFC4X3_DEV_7e95fe8.IFCLINE' IN TYPEOF(OuterCurve));
	WR3 : NOT('IFC4X3_DEV_7e95fe8.IFCOFFSETCURVE2D' IN TYPEOF(OuterCurve));
END_ENTITY;