IfcZShapeProfileDef

BACnet MVD

#### IfcZShapeProfileDef

Natural language names

| Z-Profil - parametrische Definition
| ZShape Profile Def
| Définition de section d'un profil en Z

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcZShapeProfileDef |  |  |  |
Position |  |  | MODIFIED | Instantiation changed to OPTIONAL.
FilletRadius |  |  | MODIFIED | Type changed from IfcPositiveLengthMeasure to IfcNonNegativeLengthMeasure.
EdgeRadius |  |  | MODIFIED | Type 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 378 illustrates parameters of the Z-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 378 — Z-shape profile

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
4 | Depth | IfcPositiveLengthMeasure |  | Web length, see illustration above (= h). | X | X
5 | FlangeWidth | IfcPositiveLengthMeasure |  | Flange length, see illustration above (= b). | X | X
6 | WebThickness | IfcPositiveLengthMeasure |  | Constant wall thickness of web, see illustration above (= ts). | X | X
7 | FlangeThickness | IfcPositiveLengthMeasure |  | Constant wall thickness of flange, see illustration above (= tg). | X | X
8 | FilletRadius | IfcNonNegativeLengthMeasure | ? | Fillet radius according the above illustration (= r1). | X | X
9 | EdgeRadius | IfcNonNegativeLengthMeasure | ? | Edge radius according the above illustration (= r2). | X | X

Formal Propositions

Rule | Description
--- | ---
ValidFlangeThickness | The flange thickness shall be smaller than half of the depth.

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcProfileDef
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. | X | X
2 | ProfileName | 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. | X | X

HasExternalReference

IfcExternalReferenceRelationship
@RelatedResourceObjects

S[0:?]

Reference to external information, e.g. library, classification, or document information, which is associated with the profile.

> IFC4 CHANGE New inverse attribute

X

HasProperties

IfcProfileProperties
@ProfileDefinition

S[0:?]

Additional properties of the profile, for example mechanical properties.

> IFC4 CHANGE New inverse attribute

X

IfcParameterizedProfileDef
3 | Position | IfcAxis2Placement2D | ? | Position coordinate system of the parameterized profile definition. If unspecified, no translation and no rotation is applied. | X | X
IfcZShapeProfileDef
4 | Depth | IfcPositiveLengthMeasure |  | Web length, see illustration above (= h). | X | X
5 | FlangeWidth | IfcPositiveLengthMeasure |  | Flange length, see illustration above (= b). | X | X
6 | WebThickness | IfcPositiveLengthMeasure |  | Constant wall thickness of web, see illustration above (= ts). | X | X
7 | FlangeThickness | IfcPositiveLengthMeasure |  | Constant wall thickness of flange, see illustration above (= tg). | X | X
8 | FilletRadius | IfcNonNegativeLengthMeasure | ? | Fillet radius according the above illustration (= r1). | X | X
9 | EdgeRadius | IfcNonNegativeLengthMeasure | ? | Edge radius according the above illustration (= r2). | X | X

##### Formal representations

XML 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;

EXPRESS-G diagram

`

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