IfcTShapeProfileDef

Item	SPF	Change	Description
IFC2x3 to IFC4
IfcTShapeProfileDef
Position		MODIFIED	Instantiation changed to OPTIONAL.
FilletRadius		MODIFIED	Type changed from IfcPositiveLengthMeasure to IfcNonNegativeLengthMeasure.
FlangeEdgeRadius		MODIFIED	Type changed from IfcPositiveLengthMeasure to IfcNonNegativeLengthMeasure.
WebEdgeRadius		MODIFIED	Type changed from IfcPositiveLengthMeasure to IfcNonNegativeLengthMeasure.
CentreOfGravityInY	X	DELETED

Semantic definitions at the entity

Entity 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.

HISTORY New entity in IFC2x2.

IFC2x3 CHANGE All profile origins are now in the center of the bounding box.

IFC4 CHANGE Type of FilletRadius, FlangeEdgeRadius, and WebEdgeRadius relaxed to allow for zero radius. Trailing attribute CentreOfGravityInY deleted, use respective property in IfcExtendedProfileProperties instead.

Figure 400 illustrates parameters of the T-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.

Figure 400 — T-shape profile

Attribute definitions

#	Attribute	Type	Cardinality	Description	C
4	Depth	IfcPositiveLengthMeasure	[1:1]	Web lengths, see illustration above (= h).	X
5	FlangeWidth	IfcPositiveLengthMeasure	[1:1]	Flange lengths, see illustration above (= b).	X
6	WebThickness	IfcPositiveLengthMeasure	[1:1]	Constant wall thickness of web (= ts).	X
7	FlangeThickness	IfcPositiveLengthMeasure	[1:1]	Constant wall thickness of flange (= tg).	X
8	FilletRadius	IfcNonNegativeLengthMeasure	[0:1]	Fillet radius according the above illustration (= r1).	X
9	FlangeEdgeRadius	IfcNonNegativeLengthMeasure	[0:1]	Edge radius according the above illustration (= r2).	X
10	WebEdgeRadius	IfcNonNegativeLengthMeasure	[0:1]	Edge radius according the above illustration (= r3).	X
11	WebSlope	IfcPlaneAngleMeasure	[0:1]	Slope of flange of the profile.	X
12	FlangeSlope	IfcPlaneAngleMeasure	[0:1]	Slope of web of the profile.	X

Formal Propositions

Rule	Description
ValidFlangeThickness	The flange thickness shall be smaller than the depth.
ValidWebThickness	The web thickness shall be smaller than the flange width.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	C
IfcProfileDef
1	ProfileType	IfcProfileTypeEnum	[1:1]	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.	X
2	ProfileName	IfcLabel	[0:1]	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.	X
	HasExternalReference	IfcExternalReferenceRelationship @RelatedResourceObjects	S[0:?]	Reference to external information, e.g. library, classification, or document information, which is associated with the profile.	X
	HasProperties	IfcProfileProperties @ProfileDefinition	S[0:?]	Additional properties of the profile, for example mechanical properties.	X
IfcParameterizedProfileDef
3	Position	IfcAxis2Placement2D	[0:1]	Position coordinate system of the parameterized profile definition. If unspecified, no translation and no rotation is applied.	X
IfcTShapeProfileDef
4	Depth	IfcPositiveLengthMeasure	[1:1]	Web lengths, see illustration above (= h).	X
5	FlangeWidth	IfcPositiveLengthMeasure	[1:1]	Flange lengths, see illustration above (= b).	X
6	WebThickness	IfcPositiveLengthMeasure	[1:1]	Constant wall thickness of web (= ts).	X
7	FlangeThickness	IfcPositiveLengthMeasure	[1:1]	Constant wall thickness of flange (= tg).	X
8	FilletRadius	IfcNonNegativeLengthMeasure	[0:1]	Fillet radius according the above illustration (= r1).	X
9	FlangeEdgeRadius	IfcNonNegativeLengthMeasure	[0:1]	Edge radius according the above illustration (= r2).	X
10	WebEdgeRadius	IfcNonNegativeLengthMeasure	[0:1]	Edge radius according the above illustration (= r3).	X
11	WebSlope	IfcPlaneAngleMeasure	[0:1]	Slope of flange of the profile.	X
12	FlangeSlope	IfcPlaneAngleMeasure	[0:1]	Slope of web of the profile.	X

Definitions applying to Common Use Definitions

Concept inheritance

#	Concept	Model View
IfcProfileDef
	Property Sets for Objects	Common Use Definitions

Examples

Beam standard case

Formal representations

XSD Specification

 <xs:element name="IfcTShapeProfileDef" type="ifc:IfcTShapeProfileDef" substitutionGroup="ifc:IfcParameterizedProfileDef" nillable="true"/>

 <xs:complexType name="IfcTShapeProfileDef">

  <xs:complexContent>

   <xs:extension base="ifc:IfcParameterizedProfileDef">

    <xs:attribute name="Depth" type="ifc:IfcPositiveLengthMeasure" use="optional"/>

    <xs:attribute name="FlangeWidth" type="ifc:IfcPositiveLengthMeasure" use="optional"/>

    <xs:attribute name="WebThickness" type="ifc:IfcPositiveLengthMeasure" use="optional"/>

    <xs:attribute name="FlangeThickness" type="ifc:IfcPositiveLengthMeasure" use="optional"/>

    <xs:attribute name="FilletRadius" type="ifc:IfcNonNegativeLengthMeasure" use="optional"/>

    <xs:attribute name="FlangeEdgeRadius" type="ifc:IfcNonNegativeLengthMeasure" use="optional"/>

    <xs:attribute name="WebEdgeRadius" type="ifc:IfcNonNegativeLengthMeasure" use="optional"/>

    <xs:attribute name="WebSlope" type="ifc:IfcPlaneAngleMeasure" use="optional"/>

    <xs:attribute name="FlangeSlope" type="ifc:IfcPlaneAngleMeasure" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


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;

 EXPRESS-G diagram

Link to this page

	T-Profil - parametrische Definition
	TShape Profile Def
	Définition de section d'un profil en T