IfcReinforcementDefinitionProperties

BACnet MVD

#### IfcReinforcementDefinitionProperties

Natural language names

| Festdefinierte Merkmale der Bewehrung
| Reinforcement Definition Properties
| Propriétés de définition du ferraillage

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcReinforcementDefinitionProperties |  |  |  |
OwnerHistory |  |  | MODIFIED | Instantiation changed to OPTIONAL.

##### Semantic definitions at the entity

Entity definition

IfcReinforcementDefinitionProperties defines the cross section properties of reinforcement included in reinforced concrete building elements. The property set definition may be used both in conjunction with insitu and precast structures.

This subtype of IfcPropertySetDefinition is used to define the reinforcement properties in early design stages, such as in requirement definition or scheme design. In later design stages explicit instances of subtypes of IfcReinforcingElement are used. The intended usage may be indicated using the DefinitionType attribute value as a designator: recommended values are 'Reinforcement area requirement' or 'Reinforcement configuration requirement'. Other values may be used according to local standards.

Only one property set definition of this kind is used for each concrete building element in each intended usage indicated by the DefinitionType attribute value. This set then defines a list of cross section properties in a discrete number of longitudinal sections as instances of IfcSectionReinforcementProperties (one for each structural reinforcement bar role), which in turn have a section cross section property defined as a profile and a number of reinforcement properties, one for each steel grade / bar type.

> HISTORY New entity in IFC2x2

> IFC4 CHANGE Supertype changed from IfcPropertySetDefinition to IfcPreDefinedPropertySet

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
5 | DefinitionType | IfcLabel | ? | Descriptive type name applied to reinforcement definition properties. |  | X
6 | ReinforcementSectionDefinitions | IfcSectionReinforcementProperties | L[1:?] | The list of section reinforcement properties attached to the reinforcement definition properties. |  | X

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcRoot
1 | GlobalId | IfcGloballyUniqueId |  | Assignment of a globally unique identifier within the entire software world. | X | X

2

OwnerHistory

IfcOwnerHistory

?

Assignment of the information about the current ownership of that object, including owning actor, application, local identification and information captured about the recent changes of the object,

> NOTE only the last modification in stored - either as addition, deletion or modification.

> IFC4 CHANGE The attribute has been changed to be OPTIONAL.

X

X

3 | Name | IfcLabel | ? | Optional name for use by the participating software systems or users. For some subtypes of IfcRoot the insertion of the Name attribute may be required. This would be enforced by a where rule. | X | X
4 | Description | IfcText | ? | Optional description, provided for exchanging informative comments. |  | X
IfcPropertyDefinition
| HasContext | IfcRelDeclares @RelatedDefinitions | S[0:1] |  |  | X
| HasAssociations | IfcRelAssociates @RelatedObjects | S[0:?] | Reference to the relationship IfcRelAssociates and thus to those externally defined concepts, like classifications, documents, or library information, which are associated to the property definition. |  | X
IfcPropertySetDefinition

DefinesType

IfcTypeObject
@HasPropertySets

S[0:?]

The type object to which the property set is assigned. The property set acts as a shared property set to all occurrences of the type object.

> NOTE The relationship between the IfcPropertySetDefinition and the IfcTypeObject is a direct relationship, not utilizing IfcRelDefinesByProperties, for maintaining compatibility with earlier releases of this standard.

> IFC4 CHANGE The cardinality has been changed from 0:1 to 0:? with upward compatibility for file based exchange.

X

IsDefinedBy

IfcRelDefinesByTemplate
@RelatedPropertySets

S[0:?]

Relation to the property set template, via the objectified relationship IfcRelDefinesByTemplate, that, if given, provides the definition template for the property set or quantity set and its properties.

> IFC4 CHANGE New inverse relationship, change made with upward compatibility for file based exchange.

X

DefinesOccurrence

IfcRelDefinesByProperties
@RelatingPropertyDefinition

S[0:?]

Reference to the relation to one or many object occurrences that are characterized by the property set definition. A single property set can be assigned to multiple object occurrences using the objectified relationship IfcRefDefinesByProperties.

> IFC4 CHANGE Inverse attribute renamed from PropertyDefinitionOf with upward compatibility for file-based exchange.

X

IfcPreDefinedPropertySet
IfcReinforcementDefinitionProperties
5 | DefinitionType | IfcLabel | ? | Descriptive type name applied to reinforcement definition properties. |  | X
6 | ReinforcementSectionDefinitions | IfcSectionReinforcementProperties | L[1:?] | The list of section reinforcement properties attached to the reinforcement definition properties. |  | X

##### Definitions applying to Design Transfer View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View

##### Definitions applying to BACnet View

Concept inheritance

# | Concept | Template | Model View
--- | --- | --- | ---
IfcRoot
| Revision Control | Revision Control | Design Transfer View

##### Formal representations

XML Specification
`<xs:element name="IfcReinforcementDefinitionProperties" type="ifc:IfcReinforcementDefinitionProperties" substitutionGroup="ifc:IfcPreDefinedPropertySet" nillable="true"/>
<xs:complexType name="IfcReinforcementDefinitionProperties">
<xs:complexContent>
<xs:extension base="ifc:IfcPreDefinedPropertySet">
<xs:sequence>
<xs:element name="ReinforcementSectionDefinitions">
<xs:complexType>
<xs:sequence>
<xs:element ref="ifc:IfcSectionReinforcementProperties" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute ref="ifc:itemType" fixed="ifc:IfcSectionReinforcementProperties"/>
<xs:attribute ref="ifc:cType" fixed="list"/>
<xs:attribute ref="ifc:arraySize" use="optional"/>
</xs:complexType>
</xs:element>
</xs:sequence>
<xs:attribute name="DefinitionType" type="ifc:IfcLabel" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcReinforcementDefinitionProperties
SUBTYPE OF (IfcPreDefinedPropertySet);
DefinitionType : OPTIONAL IfcLabel;
ReinforcementSectionDefinitions : LIST [1:?] OF IfcSectionReinforcementProperties;
END_ENTITY;

EXPRESS-G diagram

`

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