IfcSectionProperties

BACnet MVD

#### IfcSectionProperties

Natural language names

| Bewehrungsquerschnitt - Merkmale
| Section Properties
| Propriétés de section

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcSectionProperties |  |  | MOVED | Schema changed from IFCPROFILEPROPERTYRESOURCE to IFCPROFILERESOURCE.

##### Semantic definitions at the entity

Entity definition

IfcSectionProperties defines the cross section properties for a single longitudinal piece of a cross section. It is a special-purpose helper class for IfcSectionReinforcementProperties.

> HISTORY New entity in IFC2x2.

The section piece may be either uniform or tapered. In the latter case an end profile should also be provided. The start and end profiles are assumed to be of the same profile type. Generally only rectangular or circular cross section profiles are assumed to be used.

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
1 | SectionType | IfcSectionTypeEnum |  | An indicator whether a specific piece of a cross section is uniform or tapered in longitudinal direction. |  | X
2 | StartProfile | IfcProfileDef |  | The cross section profile at the start point of the longitudinal section. |  | X
3 | EndProfile | IfcProfileDef | ? | The cross section profile at the end point of the longitudinal section. |  | X

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcPropertyAbstraction

HasExternalReferences

IfcExternalReferenceRelationship
@RelatedResourceObjects

S[0:?]

Reference to an external reference, e.g. library, classification, or document information, that is associated to the property definition.

> IFC4 CHANGE New inverse attribute.

X

IfcPreDefinedProperties
IfcSectionProperties
1 | SectionType | IfcSectionTypeEnum |  | An indicator whether a specific piece of a cross section is uniform or tapered in longitudinal direction. |  | X
2 | StartProfile | IfcProfileDef |  | The cross section profile at the start point of the longitudinal section. |  | X
3 | EndProfile | IfcProfileDef | ? | The cross section profile at the end point of the longitudinal section. |  | X

##### Formal representations

XML Specification
`<xs:element name="IfcSectionProperties" type="ifc:IfcSectionProperties" substitutionGroup="ifc:IfcPreDefinedProperties" nillable="true"/>
<xs:complexType name="IfcSectionProperties">
<xs:complexContent>
<xs:extension base="ifc:IfcPreDefinedProperties">
<xs:sequence>
<xs:element name="StartProfile" type="ifc:IfcProfileDef" nillable="true"/>
<xs:element name="EndProfile" type="ifc:IfcProfileDef" nillable="true" minOccurs="0"/>
</xs:sequence>
<xs:attribute name="SectionType" type="ifc:IfcSectionTypeEnum" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcSectionProperties
SUBTYPE OF (IfcPreDefinedProperties);
SectionType : IfcSectionTypeEnum;
StartProfile : IfcProfileDef;
EndProfile : OPTIONAL IfcProfileDef;
END_ENTITY;

EXPRESS-G diagram

`

References: IfcSectionReinforcementProperties

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