IfcReinforcementBarProperties

BACnet MVD

#### IfcReinforcementBarProperties

Natural language names

| Bewehrungsstab - Merkmale
| Reinforcement Bar Properties
| Propriétés du ferraillage

Change log

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

##### Semantic definitions at the entity

Entity definition

IfcReinforcementProperties defines the set of properties for a specific combination of reinforcement bar steel grade, bar type and effective depth.

> HISTORY New entity in IFC2x2.

The total cross section area for the specific steel grade is always provided. Additionally also general reinforcing bar configurations as a count of bars may be provided as defined in attribute BarCount. In this case the nominal bar diameter should be identical for all given bars as defined in attribute NominalBarDiameter.

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
1 | TotalCrossSectionArea | IfcAreaMeasure |  | The total effective cross-section area of the reinforcement of a specific steel grade. |  | X
2 | SteelGrade | IfcLabel |  | The nominal steel grade defined according to local standards. |  | X
3 | BarSurface | IfcReinforcingBarSurfaceEnum | ? | Indicator for whether the bar surface is plain or textured. |  | X
4 | EffectiveDepth | IfcLengthMeasure | ? | The effective depth, i.e. the distance of the specific reinforcement cross section area or reinforcement configuration in a row, counted from a common specific reference point. Usually the reference point is the upper surface (for beams and slabs) or a similar projection in a plane (for columns). |  | X
5 | NominalBarDiameter | IfcPositiveLengthMeasure | ? | The nominal diameter defining the cross-section size of the reinforcing bar. The bar diameter should be identical for all bars included in the specific reinforcement configuration. |  | X
6 | BarCount | IfcCountMeasure | ? | The number of bars with identical nominal diameter and steel grade included in the specific reinforcement configuration. |  | 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
IfcReinforcementBarProperties
1 | TotalCrossSectionArea | IfcAreaMeasure |  | The total effective cross-section area of the reinforcement of a specific steel grade. |  | X
2 | SteelGrade | IfcLabel |  | The nominal steel grade defined according to local standards. |  | X
3 | BarSurface | IfcReinforcingBarSurfaceEnum | ? | Indicator for whether the bar surface is plain or textured. |  | X
4 | EffectiveDepth | IfcLengthMeasure | ? | The effective depth, i.e. the distance of the specific reinforcement cross section area or reinforcement configuration in a row, counted from a common specific reference point. Usually the reference point is the upper surface (for beams and slabs) or a similar projection in a plane (for columns). |  | X
5 | NominalBarDiameter | IfcPositiveLengthMeasure | ? | The nominal diameter defining the cross-section size of the reinforcing bar. The bar diameter should be identical for all bars included in the specific reinforcement configuration. |  | X
6 | BarCount | IfcCountMeasure | ? | The number of bars with identical nominal diameter and steel grade included in the specific reinforcement configuration. |  | X

##### Formal representations

XML Specification
`<xs:element name="IfcReinforcementBarProperties" type="ifc:IfcReinforcementBarProperties" substitutionGroup="ifc:IfcPreDefinedProperties" nillable="true"/>
<xs:complexType name="IfcReinforcementBarProperties">
<xs:complexContent>
<xs:extension base="ifc:IfcPreDefinedProperties">
<xs:attribute name="TotalCrossSectionArea" type="ifc:IfcAreaMeasure" use="optional"/>
<xs:attribute name="SteelGrade" type="ifc:IfcLabel" use="optional"/>
<xs:attribute name="BarSurface" type="ifc:IfcReinforcingBarSurfaceEnum" use="optional"/>
<xs:attribute name="EffectiveDepth" type="ifc:IfcLengthMeasure" use="optional"/>
<xs:attribute name="NominalBarDiameter" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
<xs:attribute name="BarCount" type="ifc:IfcCountMeasure" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcReinforcementBarProperties
SUBTYPE OF (IfcPreDefinedProperties);
TotalCrossSectionArea : IfcAreaMeasure;
SteelGrade : IfcLabel;
BarSurface : OPTIONAL IfcReinforcingBarSurfaceEnum;
EffectiveDepth : OPTIONAL IfcLengthMeasure;
NominalBarDiameter : OPTIONAL IfcPositiveLengthMeasure;
BarCount : OPTIONAL IfcCountMeasure;
END_ENTITY;

EXPRESS-G diagram

`

References: IfcSectionReinforcementProperties

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