IFC 4.3.0.1 (IFC4X3) development

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.

T-shape profile
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:

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

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.

HasProperties SET [0:?] OF IfcProfileProperties FOR ProfileDefinition

Additional properties of the profile, for example mechanical properties.

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 Click to hide 5 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.B

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.C

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:

Click to show 1 hidden inherited concepts Click to hide 1 inherited concepts
Table 8.15.3.25.D

8.15.3.25.7 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;

8.15.3.25.8 References

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8.15.3.25.9 Changelog