7.8.3.6 IfcReinforcingBar

Bewehrungsstab
barre d'armature

A reinforcing bar is usually made of steel with manufactured deformations in the surface, and used in concrete and masonry construction to provide additional strength. A single instance of this class may represent one or many of actual rebars, for example a row of rebars.

HISTORY  New entity in IFC2x2
IFC 2x4 CHANGE  All attributes are optional now. Several attributes are deprecated; their information now provided by IfcReinforcingBarType. Attribute BarRole renamed to PredefinedType.

Geometry Use Definition

Placement and representation are defined at the supertype IfcElementComponent.

The representation map of a mapped 'Body' representation should contain a representation of type 'AdvancedSweptSolid' which holds an IfcSweptDiskSolid (including subtype IfcSweptDiskSolidPolygonal).


Common Use Definitions

The following concepts are inherited at supertypes:

 Instance diagram

Object Typing

The Object Typing concept applies to this entity as shown in Table 656.
Type
IfcReinforcingBarType

Table 656 — IfcReinforcingBar Object Typing



Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 657.
PredefinedTypeName
 Pset_Condition
 Pset_EnvironmentalImpactIndicators
 Pset_EnvironmentalImpactValues
 Pset_ManufacturerOccurrence
 Pset_ManufacturerTypeInformation
 Pset_PackingInstructions
 Pset_ServiceLife
 Pset_Warranty

Table 657 — IfcReinforcingBar Property Sets for Objects



Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 658.
Name
Qto_ReinforcingElementBaseQuantities

Table 658 — IfcReinforcingBar Quantity Sets



Material Profile Set Usage

The Material Profile Set Usage concept applies to this entity as shown in Table 659.
NameDescription
CoreMaterial from which the rebar is constructed, such as steel.
CoatingOuter coating, if applicable.

Table 659 — IfcReinforcingBar Material Profile Set Usage



Body Geometry

The Body Geometry concept applies to this entity as shown in Table 660.
IdentifierTypeItems
   

Table 660 — IfcReinforcingBar Body Geometry

The representation map referenced by a 'Body' 'MappedRepresentation' should contain a representation of type 'AdvancedSweptSolid' which holds an IfcSweptDiskSolid (including subtype IfcSweptDiskSolidPolygonal). Multiple IfcMappedItem's can be used to represent several bars as one occurrence of IfcReinforcingBar.




XSD Specification:

 <xs:element name="IfcReinforcingBar" type="ifc:IfcReinforcingBar" substitutionGroup="ifc:IfcReinforcingElement" nillable="true"/>
 <xs:complexType name="IfcReinforcingBar">
  <xs:complexContent>
   <xs:extension base="ifc:IfcReinforcingElement">
    <xs:attribute name="NominalDiameter" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
    <xs:attribute name="CrossSectionArea" type="ifc:IfcAreaMeasure" use="optional"/>
    <xs:attribute name="BarLength" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
    <xs:attribute name="PredefinedType" type="ifc:IfcReinforcingBarTypeEnum" use="optional"/>
    <xs:attribute name="BarSurface" type="ifc:IfcReinforcingBarSurfaceEnum" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcReinforcingBar
SUBTYPE OF IfcReinforcingElement;
NominalDiameter : OPTIONAL IfcPositiveLengthMeasure;
CrossSectionArea : OPTIONAL IfcAreaMeasure;
BarLength : OPTIONAL IfcPositiveLengthMeasure;
PredefinedType : OPTIONAL IfcReinforcingBarTypeEnum;
BarSurface : OPTIONAL IfcReinforcingBarSurfaceEnum;
WHERE
CorrectPredefinedType : NOT EXISTS(PredefinedType) OR (PredefinedType <> IfcReinforcingBarTypeEnum.USERDEFINED) OR ((PredefinedType = IfcReinforcingBarTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcObject.ObjectType)) ;
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCSTRUCTURALELEMENTSDOMAIN.IFCREINFORCINGBARTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

Attribute Definitions:

NominalDiameter : Deprecated.
IFC4 CHANGE  Attribute made optional and deprecated. Use respective attribute at IfcReinforcingBarType instead.
CrossSectionArea : The effective cross-section area of the reinforcing bar or group of bars.
IFC4 CHANGE  Attribute made optional.
BarLength : Deprecated.
IFC4 CHANGE  Attribute deprecated. Use respective attribute at IfcReinforcingBarType instead.
PredefinedType : The role, purpose or usage of the bar, i.e. the kind of loads and stresses it is intended to carry.
IFC4 CHANGE  Attribute renamed from BarRole to PredefinedType and made optional. Type changed from IfcReinforcingBarRoleEnum without changes to the range of enumeration items.
BarSurface : Deprecated.
IFC4 CHANGE  Attribute made optional and deprecated. Use respective attribute at IfcReinforcingBarType instead.

Formal Propositions:

CorrectPredefinedType : Either the PredefinedType attribute is unset (e.g. because an IfcReinforcingBarType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssigned : If this occurrence is defined by a type object, the latter has to be an IfcReinforcingBarType.

Inheritance Graph:

ENTITY IfcReinforcingBar
ENTITY IfcRoot
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
INVERSE
HasAssignments : SET OF IfcRelAssigns FOR RelatedObjects;
Nests : SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy : SET OF IfcRelNests FOR RelatingObject;
HasContext : SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy : SET OF IfcRelAggregates FOR RelatingObject;
Decomposes : SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations : SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcObject
ObjectType : OPTIONAL IfcLabel;
INVERSE
IsDeclaredBy : SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares : SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy : SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy : SET OF IfcRelDefinesByProperties FOR RelatedObjects;
ENTITY IfcProduct
ObjectPlacement : OPTIONAL IfcObjectPlacement;
Representation : OPTIONAL IfcProductRepresentation;
INVERSE
ReferencedBy : SET OF IfcRelAssignsToProduct FOR RelatingProduct;
ENTITY IfcElement
Tag : OPTIONAL IfcIdentifier;
INVERSE
FillsVoids : SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement;
ConnectedTo : SET OF IfcRelConnectsElements FOR RelatingElement;
IsInterferedByElements : SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements : SET OF IfcRelInterferesElements FOR RelatingElement;
HasProjections : SET OF IfcRelProjectsElement FOR RelatingElement;
ReferencedInStructures : SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;
HasOpenings : SET OF IfcRelVoidsElement FOR RelatingBuildingElement;
IsConnectionRealization : SET OF IfcRelConnectsWithRealizingElements FOR RealizingElements;
ProvidesBoundaries : SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;
ConnectedFrom : SET OF IfcRelConnectsElements FOR RelatedElement;
ContainedInStructure : SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;
ENTITY IfcElementComponent
ENTITY IfcReinforcingElement
SteelGrade : OPTIONAL IfcLabel;
ENTITY IfcReinforcingBar
NominalDiameter : OPTIONAL IfcPositiveLengthMeasure;
CrossSectionArea : OPTIONAL IfcAreaMeasure;
BarLength : OPTIONAL IfcPositiveLengthMeasure;
PredefinedType : OPTIONAL IfcReinforcingBarTypeEnum;
BarSurface : OPTIONAL IfcReinforcingBarSurfaceEnum;
END_ENTITY;

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