IfcZShapeProfileDef

Natural language names
deZ-Profil - parametrische Definition
enZShape Profile Def
frDéfinition de section d'un profil en Z
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4
    IfcZShapeProfileDef
      PositionMODIFIEDInstantiation changed to OPTIONAL.
      FilletRadiusMODIFIEDType changed from IfcPositiveLengthMeasure to IfcNonNegativeLengthMeasure.
      EdgeRadiusMODIFIEDType changed from IfcPositiveLengthMeasure to IfcNonNegativeLengthMeasure.
Semantic definitions at the entity
Entity definition

IfcZShapeProfileDef defines a section profile that provides the defining parameters of a Z-shape 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.
IFC4 CHANGE  Type of FilletRadius and EdgeRadius relaxed to allow for zero radius.

Figure 402 illustrates parameters of the Z-shape profile definition.

Z-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.

Figure 402 — Z-shape profile

Attribute definitions
#AttributeTypeCardinalityDescription C
4DepthIfcPositiveLengthMeasure[1:1] Web length, see illustration above (= h). X
5FlangeWidthIfcPositiveLengthMeasure[1:1] Flange length, see illustration above (= b). X
6WebThicknessIfcPositiveLengthMeasure[1:1] Constant wall thickness of web, see illustration above (= ts). X
7FlangeThicknessIfcPositiveLengthMeasure[1:1] Constant wall thickness of flange, see illustration above (= tg). X
8FilletRadiusIfcNonNegativeLengthMeasure[0:1] Fillet radius according the above illustration (= r1).X
9EdgeRadiusIfcNonNegativeLengthMeasure[0:1] Edge radius according the above illustration (= r2).X
Formal Propositions
RuleDescription
ValidFlangeThicknessThe flange thickness shall be smaller than half of the depth.
Inherited definitions from supertypes
Entity inheritance IfcParameterizedProfileDef IfcProfileDef
Attribute inheritance
#AttributeTypeCardinalityDescriptionC
IfcProfileDef
1ProfileTypeIfcProfileTypeEnum[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
2ProfileNameIfcLabel[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
HasExternalReferenceIfcExternalReferenceRelationship
@RelatedResourceObjects		S[0:?]Reference to external information, e.g. library, classification, or document information, which is associated with the profile. X
HasPropertiesIfcProfileProperties
@ProfileDefinition		S[0:?]Additional properties of the profile, for example mechanical properties. X
IfcParameterizedProfileDef
3PositionIfcAxis2Placement2D[0:1] Position coordinate system of the parameterized profile definition. If unspecified, no translation and no rotation is applied. X
IfcZShapeProfileDef
4DepthIfcPositiveLengthMeasure[1:1] Web length, see illustration above (= h). X
5FlangeWidthIfcPositiveLengthMeasure[1:1] Flange length, see illustration above (= b). X
6WebThicknessIfcPositiveLengthMeasure[1:1] Constant wall thickness of web, see illustration above (= ts). X
7FlangeThicknessIfcPositiveLengthMeasure[1:1] Constant wall thickness of flange, see illustration above (= tg). X
8FilletRadiusIfcNonNegativeLengthMeasure[0:1] Fillet radius according the above illustration (= r1).X
9EdgeRadiusIfcNonNegativeLengthMeasure[0:1] Edge radius according the above illustration (= r2).X
Definitions applying to Common Use Definitions
Concept inheritance

#ConceptModel View
IfcProfileDef
Property Sets for ObjectsCommon Use Definitions
Formal representations
XSD Specification
 <xs:element name="IfcZShapeProfileDef" type="ifc:IfcZShapeProfileDef" substitutionGroup="ifc:IfcParameterizedProfileDef" nillable="true"/>
 <xs:complexType name="IfcZShapeProfileDef">
  <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="EdgeRadius" type="ifc:IfcNonNegativeLengthMeasure" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcZShapeProfileDef
 SUBTYPE OF (IfcParameterizedProfileDef);
  Depth : IfcPositiveLengthMeasure;
  FlangeWidth : IfcPositiveLengthMeasure;
  WebThickness : IfcPositiveLengthMeasure;
  FlangeThickness : IfcPositiveLengthMeasure;
  FilletRadius : OPTIONAL IfcNonNegativeLengthMeasure;
  EdgeRadius : OPTIONAL IfcNonNegativeLengthMeasure;
 WHERE
  ValidFlangeThickness : FlangeThickness < (Depth / 2.);
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

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