8.15.3.27 IfcUShapeProfileDef
8.15.3.27.1 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 8.15.3.27.A illustrates parameters of the U-shape profile definition.
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.
8.15.3.27.2 Entity inheritance
8.15.3.27.3 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 | |||
| 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. |
8.15.3.27.4 Formal propositions
| Name | Description |
|---|---|
| ValidFlangeThickness |
The flange thickness shall be smaller than half of the depth. |
|
|
| ValidWebThickness |
The web thickness shall be smaller than the flange width. |
|
|
8.15.3.27.5 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
8.15.3.27.6 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 | |||
8.15.3.27.7 Formal representation
ENTITY IfcUShapeProfileDef
SUBTYPE OF (IfcParameterizedProfileDef);
Depth : IfcPositiveLengthMeasure;
FlangeWidth : IfcPositiveLengthMeasure;
WebThickness : IfcPositiveLengthMeasure;
FlangeThickness : IfcPositiveLengthMeasure;
FilletRadius : OPTIONAL IfcNonNegativeLengthMeasure;
EdgeRadius : OPTIONAL IfcNonNegativeLengthMeasure;
FlangeSlope : OPTIONAL IfcPlaneAngleMeasure;
WHERE
ValidFlangeThickness : FlangeThickness < (Depth / 2.);
ValidWebThickness : WebThickness < FlangeWidth;
END_ENTITY;