IFC (IFC4X3_ADD2) under development IfcUShapeProfileDef Semantic definition

IfcUShapeProfileDef defines a section profile that provides the defining parameters of a U-shape (channel) 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 illustrates parameters of the U-shape profile definition.

U-shape profile
Figure — U-shape profile


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. Entity inheritance 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
IfcUShapeProfileDef (7)
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 EdgeRadius OPTIONAL IfcNonNegativeLengthMeasure

Edge radius according the above illustration (= r2).

10 FlangeSlope OPTIONAL IfcPlaneAngleMeasure

Slope of flange of the profile.

Table Formal propositions

Name Description

The flange thickness shall be smaller than half of the depth.

FlangeThickness < (Depth / 2.)

The web thickness shall be smaller than the flange width.

WebThickness < FlangeWidth
Table 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 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 Formal representation

ENTITY IfcUShapeProfileDef
 SUBTYPE OF (IfcParameterizedProfileDef);
	Depth : IfcPositiveLengthMeasure;
	FlangeWidth : IfcPositiveLengthMeasure;
	WebThickness : IfcPositiveLengthMeasure;
	FlangeThickness : IfcPositiveLengthMeasure;
	FilletRadius : OPTIONAL IfcNonNegativeLengthMeasure;
	EdgeRadius : OPTIONAL IfcNonNegativeLengthMeasure;
	FlangeSlope : OPTIONAL IfcPlaneAngleMeasure;
	ValidFlangeThickness : FlangeThickness < (Depth / 2.);
	ValidWebThickness : WebThickness < FlangeWidth;
END_ENTITY; References

Edit on Github

Is this page difficult to understand? Let us know! Changelog IFC4