 | Rechteckprofil hohl - parametrische Definition |
 | Rectangle Hollow Profile Def |
| Item | SPF | XML | Change | Description | IFC2x3 to IFC4 |
|---|---|---|---|---|
| IfcRectangleHollowProfileDef | ||||
| Position | MODIFIED | Instantiation changed to OPTIONAL. | ||
| InnerFilletRadius | MODIFIED | Type changed from IfcPositiveLengthMeasure to IfcNonNegativeLengthMeasure. | ||
| OuterFilletRadius | MODIFIED | Type changed from IfcPositiveLengthMeasure to IfcNonNegativeLengthMeasure. |
IfcRectangleHollowProfileDef defines a section profile that provides the defining parameters of a rectangular (or square) hollow section to be used by the swept surface geometry or the swept area solid. Its parameters and orientation relative to the position coordinate system are according to the following illustration. A square hollow section can be defined by equal values for h and b. The centre of the position coordinate system is in the profiles centre of the bounding box (for symmetric profiles identical with the centre of gravity). Normally, the longer sides are parallel to the y-axis, the shorter sides parallel to the x-axis.
HISTORY New entity in IFC2x2.
IFC4 CHANGE Types of InnerFilletRadius and OuterFilletRadius relaxed to allow for zero values.
Figure 426 illustrates parameters of a rectangular or square hollow profile definition.
| ||
Figure 426 — Rectangle hollow profile |
| # | Attribute | Type | Cardinality | Description | G |
|---|---|---|---|---|---|
| 6 | WallThickness | IfcPositiveLengthMeasure | Thickness of the material. | X | |
| 7 | InnerFilletRadius | IfcNonNegativeLengthMeasure | ? | Inner corner radius. | X |
| 8 | OuterFilletRadius | IfcNonNegativeLengthMeasure | ? | Outer corner radius. | X |
| Rule | Description |
|---|---|
| ValidWallThickness | The wall thickness shall be smaller than half of the X and Y dimension of the rectangle. |
| ValidInnerRadius | The inner fillet radius (if given) shall be small enough to fit into the void. |
| ValidOuterRadius | The outer fillet radius (if given) shall be small enough to fit into the bounding box. |
| # | 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 |
| IfcRectangleProfileDef | |||||
| 4 | XDim | IfcPositiveLengthMeasure | The extent of the rectangle in the direction of the x-axis. | X | |
| 5 | YDim | IfcPositiveLengthMeasure | The extent of the rectangle in the direction of the y-axis. | X | |
| IfcRectangleHollowProfileDef | |||||
| 6 | WallThickness | IfcPositiveLengthMeasure | Thickness of the material. | X | |
| 7 | InnerFilletRadius | IfcNonNegativeLengthMeasure | ? | Inner corner radius. | X |
| 8 | OuterFilletRadius | IfcNonNegativeLengthMeasure | ? | Outer corner radius. | X |
| # | Concept | Template | Model View |
|---|---|---|---|
| IfcProfileDef | |||
| Property Sets for Objects | Property Sets for Objects | General Usage | |
<xs:element name="IfcRectangleHollowProfileDef" type="ifc:IfcRectangleHollowProfileDef" substitutionGroup="ifc:IfcRectangleProfileDef" nillable="true"/>
<xs:complexType name="IfcRectangleHollowProfileDef">
<xs:complexContent>
<xs:extension base="ifc:IfcRectangleProfileDef">
<xs:attribute name="WallThickness" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
<xs:attribute name="InnerFilletRadius" type="ifc:IfcNonNegativeLengthMeasure" use="optional"/>
<xs:attribute name="OuterFilletRadius" type="ifc:IfcNonNegativeLengthMeasure" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcRectangleHollowProfileDef
SUBTYPE OF (IfcRectangleProfileDef);
WallThickness : IfcPositiveLengthMeasure;
InnerFilletRadius : OPTIONAL IfcNonNegativeLengthMeasure;
OuterFilletRadius : OPTIONAL IfcNonNegativeLengthMeasure;
WHERE
ValidWallThickness : (WallThickness < (SELF\IfcRectangleProfileDef.XDim/2.)) AND
(WallThickness < (SELF\IfcRectangleProfileDef.YDim/2.));
ValidInnerRadius : NOT(EXISTS(InnerFilletRadius)) OR
((InnerFilletRadius <= (SELF\IfcRectangleProfileDef.XDim/2. - WallThickness)) AND
(InnerFilletRadius <= (SELF\IfcRectangleProfileDef.YDim/2. - WallThickness)))
;
ValidOuterRadius : NOT(EXISTS(OuterFilletRadius)) OR
((OuterFilletRadius <= (SELF\IfcRectangleProfileDef.XDim/2.)) AND
(OuterFilletRadius <= (SELF\IfcRectangleProfileDef.YDim/2.)));
END_ENTITY;
EXPRESS-G diagram
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