8.15.3.25 IfcTShapeProfileDef

8.15.3.25.1 Semantic definition

IfcTShapeProfileDef defines a section profile that provides the defining parameters of a T-shaped section to be used by the swept area solid. Its parameters and orientation relative to the position coordinate system are according to the following illustration. The centre of the position coordinate system is in the profile's centre of the bounding box.

Figure 8.15.3.25.A illustrates parameters of the T-shape profile definition.

Figure 8.15.3.25.A — T-shape profile

Position

The parameterized profile defines its own position coordinate system. The underlying coordinate system is defined by the swept area solid that uses the profile definition. It is the xy plane of:

IfcSweptAreaSolid.Position

by using offsets of the position location, the parameterized profile can be positioned centric (using x,y offsets = 0.), or at any position relative to the profile.

8.15.3.25.2 Entity inheritance

- IfcProfileDef

8.15.3.25.3 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
IfcParameterizedProfileDef (1)
3	Position	OPTIONAL IfcAxis2Placement2D	Position coordinate system of the parameterized profile definition. If unspecified, no translation and no rotation is applied.
Click to show 5 hidden inherited attributes
IfcTShapeProfileDef (9)
4	Depth	IfcPositiveLengthMeasure	Web lengths, see illustration above (= h).
5	FlangeWidth	IfcPositiveLengthMeasure	Flange lengths, see illustration above (= b).
6	WebThickness	IfcPositiveLengthMeasure	Constant wall thickness of web (= ts).
7	FlangeThickness	IfcPositiveLengthMeasure	Constant wall thickness of flange (= tg).
8	FilletRadius	OPTIONAL IfcNonNegativeLengthMeasure	Fillet radius according the above illustration (= r1).
9	FlangeEdgeRadius	OPTIONAL IfcNonNegativeLengthMeasure	Edge radius according the above illustration (= r2).
10	WebEdgeRadius	OPTIONAL IfcNonNegativeLengthMeasure	Edge radius according the above illustration (= r3).
11	WebSlope	OPTIONAL IfcPlaneAngleMeasure	Slope of flange of the profile.
12	FlangeSlope	OPTIONAL IfcPlaneAngleMeasure	Slope of web of the profile.

Table 8.15.3.25.C

8.15.3.25.4 Formal propositions

Name	Description
ValidFlangeThickness	The flange thickness shall be smaller than the depth.
`FlangeThickness < Depth`
ValidWebThickness	The web thickness shall be smaller than the flange width.
`WebThickness < FlangeWidth`

Table 8.15.3.25.D

8.15.3.25.5 Property sets

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

8.15.3.25.6 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

Concept

Usage

Description

IfcProfileDef (1)

Click to show 1 hidden inherited concepts

Table 8.15.3.25.E

8.15.3.25.7 Examples

Figure 8.15.3.25.B

Beam Parametric Cross Section

8.15.3.25.8 Formal representation

 ENTITY IfcTShapeProfileDef
 SUBTYPE OF (IfcParameterizedProfileDef);
	Depth : IfcPositiveLengthMeasure;
	FlangeWidth : IfcPositiveLengthMeasure;
	WebThickness : IfcPositiveLengthMeasure;
	FlangeThickness : IfcPositiveLengthMeasure;
	FilletRadius : OPTIONAL IfcNonNegativeLengthMeasure;
	FlangeEdgeRadius : OPTIONAL IfcNonNegativeLengthMeasure;
	WebEdgeRadius : OPTIONAL IfcNonNegativeLengthMeasure;
	WebSlope : OPTIONAL IfcPlaneAngleMeasure;
	FlangeSlope : OPTIONAL IfcPlaneAngleMeasure;
 WHERE
	ValidFlangeThickness : FlangeThickness < Depth;
	ValidWebThickness : WebThickness < FlangeWidth;
END_ENTITY;

8.15.3.25.9 References

IfcParameterizedProfileDef