 | Kreisprofil - hohl - parametrische Definition |
 | Circle Hollow Profile Def |
 | Définition de profil circulaire épais |
| Item | SPF | XML | Change | Description | IFC2x3 to IFC4 |
|---|---|---|---|---|
| IfcCircleHollowProfileDef | ||||
| Position | MODIFIED | Instantiation changed to OPTIONAL. |
IfcCircleHollowProfileDef defines a section profile that provides the defining parameters of a circular hollow section (tube) 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 (for symmetric profiles identical with the centre of gravity).
HISTORY New entity in IFC2x2.
Figure 414 illustrates parameters of the circular hollow profile definition. 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. Explicit coordinate offsets are used to define cardinal points (for example, upper-left bound). The parameterized profile is defined by a set of parameter attributes.
Figure 414 — Circle hollow profile |
| # | Attribute | Type | Cardinality | Description | G |
|---|---|---|---|---|---|
| 5 | WallThickness | IfcPositiveLengthMeasure | Thickness of the material, it is the difference between the outer and inner radius. | X |
| Rule | Description |
|---|---|
| WR1 | The wall thickness shall be smaller then the radius. |
| # | Attribute | Type | Cardinality | Description | G |
|---|---|---|---|---|---|
| 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 | |
| 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 |
| 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 |
| IfcCircleProfileDef | |||||
| 4 | Radius | IfcPositiveLengthMeasure | The radius of the circle. | X | |
| IfcCircleHollowProfileDef | |||||
| 5 | WallThickness | IfcPositiveLengthMeasure | Thickness of the material, it is the difference between the outer and inner radius. | X | |
| # | Concept | Template | Model View |
|---|---|---|---|
| IfcProfileDef | |||
| Property Sets for Objects | Property Sets for Objects | General Usage | |
<xs:element name="IfcCircleHollowProfileDef" type="ifc:IfcCircleHollowProfileDef" substitutionGroup="ifc:IfcCircleProfileDef" nillable="true"/>
<xs:complexType name="IfcCircleHollowProfileDef">
<xs:complexContent>
<xs:extension base="ifc:IfcCircleProfileDef">
<xs:attribute name="WallThickness" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcCircleHollowProfileDef
SUBTYPE OF (IfcCircleProfileDef);
WallThickness : IfcPositiveLengthMeasure;
WHERE
WR1 : WallThickness < SELF\IfcCircleProfileDef.Radius;
END_ENTITY;
EXPRESS-G diagram
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