IfcReinforcingBar

Natural language names
Bewehrungsstab
Reinforcing Bar
barre d'armature
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4
    IfcReinforcingBar
      OwnerHistoryMODIFIEDInstantiation changed to OPTIONAL.
      NominalDiameterMODIFIEDInstantiation changed to OPTIONAL.
      CrossSectionAreaMODIFIEDInstantiation changed to OPTIONAL.
      PredefinedTypeMODIFIEDName changed from BarRole to PredefinedType.
Type changed from IfcReinforcingBarRoleEnum to IfcReinforcingBarTypeEnum.
Instantiation changed to OPTIONAL.
IFC4 Addendum 1
    IfcReinforcingBar
      HasCoveringsADDED
IFC4x2 DRAFT 1
    IfcReinforcingBar
      PositionedRelativeToADDED
Semantic definitions at the entity
Entity definition

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).

Attribute definitions
#AttributeTypeCardinalityDescription G
10NominalDiameterIfcPositiveLengthMeasure? Deprecated.
IFC4 CHANGE  Attribute made optional and deprecated. Use respective attribute at IfcReinforcingBarType instead.
X
11CrossSectionAreaIfcAreaMeasure? The effective cross-section area of the reinforcing bar or group of bars.
IFC4 CHANGE  Attribute made optional.
X
12BarLengthIfcPositiveLengthMeasure? Deprecated.
IFC4 CHANGE  Attribute deprecated. Use respective attribute at IfcReinforcingBarType instead.
X
13PredefinedTypeIfcReinforcingBarTypeEnum? 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.
X
14BarSurfaceIfcReinforcingBarSurfaceEnum? Deprecated.
IFC4 CHANGE  Attribute made optional and deprecated. Use respective attribute at IfcReinforcingBarType instead.
X
Formal Propositions
RuleDescription
CorrectPredefinedTypeEither 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.
CorrectTypeAssignedIf this occurrence is defined by a type object, the latter has to be an IfcReinforcingBarType.
Inherited definitions from supertypes
Entity inheritance IfcReinforcingElement IfcElementComponent IfcElement IfcProduct IfcObject IfcObjectDefinition IfcRoot
Attribute inheritance
#AttributeTypeCardinalityDescriptionG
IfcRoot
1GlobalIdIfcGloballyUniqueId Assignment of a globally unique identifier within the entire software world. X
2OwnerHistoryIfcOwnerHistory? 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
3NameIfcLabel? 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
4DescriptionIfcText? Optional description, provided for exchanging informative comments.X
IfcObjectDefinition
HasAssignmentsIfcRelAssigns
@RelatedObjects
S[0:?]Reference to the relationship objects, that assign (by an association relationship) other subtypes of IfcObject to this object instance. Examples are the association to products, processes, controls, resources or groups.X
NestsIfcRelNests
@RelatedObjects
S[0:1]References to the decomposition relationship being a nesting. It determines that this object definition is a part within an ordered whole/part decomposition relationship. An object occurrence or type can only be part of a single decomposition (to allow hierarchical strutures only).
IFC4 CHANGE  The inverse attribute datatype has been added and separated from Decomposes defined at IfcObjectDefinition.
X
IsNestedByIfcRelNests
@RelatingObject
S[0:?]References to the decomposition relationship being a nesting. It determines that this object definition is the whole within an ordered whole/part decomposition relationship. An object or object type can be nested by several other objects (occurrences or types).
IFC4 CHANGE  The inverse attribute datatype has been added and separated from IsDecomposedBy defined at IfcObjectDefinition.
X
HasContextIfcRelDeclares
@RelatedDefinitions
S[0:1]References to the context providing context information such as project unit or representation context. It should only be asserted for the uppermost non-spatial object.
IFC4 CHANGE  The inverse attribute datatype has been added.
X
IsDecomposedByIfcRelAggregates
@RelatingObject
S[0:?]References to the decomposition relationship being an aggregation. It determines that this object definition is whole within an unordered whole/part decomposition relationship. An object definitions can be aggregated by several other objects (occurrences or parts).
IFC4 CHANGE  The inverse attribute datatype has been changed from the supertype IfcRelDecomposes to subtype IfcRelAggregates.
X
DecomposesIfcRelAggregates
@RelatedObjects
S[0:1]References to the decomposition relationship being an aggregation. It determines that this object definition is a part within an unordered whole/part decomposition relationship. An object definitions can only be part of a single decomposition (to allow hierarchical strutures only).
IFC4 CHANGE  The inverse attribute datatype has been changed from the supertype IfcRelDecomposes to subtype IfcRelAggregates.
X
HasAssociationsIfcRelAssociates
@RelatedObjects
S[0:?]Reference to the relationship objects, that associates external references or other resource definitions to the object.. Examples are the association to library, documentation or classification.X
IfcObject
5ObjectTypeIfcLabel? The type denotes a particular type that indicates the object further. The use has to be established at the level of instantiable subtypes. In particular it holds the user defined type, if the enumeration of the attribute PredefinedType is set to USERDEFINED.
X
IsDeclaredByIfcRelDefinesByObject
@RelatedObjects
S[0:1]Link to the relationship object pointing to the declaring object that provides the object definitions for this object occurrence. The declaring object has to be part of an object type decomposition. The associated IfcObject, or its subtypes, contains the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes.
IFC4 CHANGE  New inverse relationship, change made with upward compatibility for file based exchange.
X
DeclaresIfcRelDefinesByObject
@RelatingObject
S[0:?]Link to the relationship object pointing to the reflected object(s) that receives the object definitions. The reflected object has to be part of an object occurrence decomposition. The associated IfcObject, or its subtypes, provides the specific information (as part of a type, or style, definition), that is common to all reflected instances of the declaring IfcObject, or its subtypes.
IFC4 CHANGE  New inverse relationship, change made with upward compatibility for file based exchange.
X
IsTypedByIfcRelDefinesByType
@RelatedObjects
S[0:1]Set of relationships to the object type that provides the type definitions for this object occurrence. The then associated IfcTypeObject, or its subtypes, contains the specific information (or type, or style), that is common to all instances of IfcObject, or its subtypes, referring to the same type.
IFC4 CHANGE  New inverse relationship, the link to IfcRelDefinesByType had previously be included in the inverse relationship IfcRelDefines. Change made with upward compatibility for file based exchange.
X
IsDefinedByIfcRelDefinesByProperties
@RelatedObjects
S[0:?]Set of relationships to property set definitions attached to this object. Those statically or dynamically defined properties contain alphanumeric information content that further defines the object.
IFC4 CHANGE  The data type has been changed from IfcRelDefines to IfcRelDefinesByProperties with upward compatibility for file based exchange.
X
IfcProduct
6ObjectPlacementIfcObjectPlacement? Placement of the product in space, the placement can either be absolute (relative to the world coordinate system), relative (relative to the object placement of another product), or constraint (e.g. relative to grid axes). It is determined by the various subtypes of IfcObjectPlacement, which includes the axis placement information to determine the transformation for the object coordinate system.X
7RepresentationIfcProductRepresentation? Reference to the representations of the product, being either a representation (IfcProductRepresentation) or as a special case a shape representations (IfcProductDefinitionShape). The product definition shape provides for multiple geometric representations of the shape property of the object within the same object coordinate system, defined by the object placement.X
ReferencedByIfcRelAssignsToProduct
@RelatingProduct
S[0:?]Reference to the IfcRelAssignsToProduct relationship, by which other products, processes, controls, resources or actors (as subtypes of IfcObjectDefinition) can be related to this product.X
PositionedRelativeToIfcRelPositions
@RelatedProducts
S[0:1]X
IfcElement
8TagIfcIdentifier? The tag (or label) identifier at the particular instance of a product, e.g. the serial number, or the position number. It is the identifier at the occurrence level.X
FillsVoidsIfcRelFillsElement
@RelatedBuildingElement
S[0:1]Reference to the IfcRelFillsElement Relationship that puts the element as a filling into the opening created within another element. X
ConnectedToIfcRelConnectsElements
@RelatingElement
S[0:?]Reference to the element connection relationship. The relationship then refers to the other element to which this element is connected to. X
IsInterferedByElementsIfcRelInterferesElements
@RelatedElement
S[0:?]Reference to the interference relationship to indicate the element that is interfered. The relationship, if provided, indicates that this element has an interference with one or many other elements.
NOTE  There is no indication of precedence between IsInterferedByElements and InterferesElements.
IFC4 CHANGE New inverse relationship.
X
InterferesElementsIfcRelInterferesElements
@RelatingElement
S[0:?]Reference to the interference relationship to indicate the element that interferes. The relationship, if provided, indicates that this element has an interference with one or many other elements.
NOTE  There is no indication of precedence between IsInterferedByElements and InterferesElements.
IFC4 CHANGE New inverse relationship.
X
HasProjectionsIfcRelProjectsElement
@RelatingElement
S[0:?]Projection relationship that adds a feature (using a Boolean union) to the IfcBuildingElement.X
ReferencedInStructuresIfcRelReferencedInSpatialStructure
@RelatedElements
S[0:?]Reference relationship to the spatial structure element, to which the element is additionally associated. This relationship may not be hierarchical, an element may be referenced by zero, one or many spatial structure elements.
IFC2x3 CHANGE  The inverse attribute has been added with upward compatibility for file based exchange.
X
HasOpeningsIfcRelVoidsElement
@RelatingBuildingElement
S[0:?]Reference to the IfcRelVoidsElement relationship that creates an opening in an element. An element can incorporate zero-to-many openings. For each opening, that voids the element, a new relationship IfcRelVoidsElement is generated. X
IsConnectionRealizationIfcRelConnectsWithRealizingElements
@RealizingElements
S[0:?]Reference to the connection relationship with realizing element. The relationship, if provided, assigns this element as the realizing element to the connection, which provides the physical manifestation of the connection relationship. X
ProvidesBoundariesIfcRelSpaceBoundary
@RelatedBuildingElement
S[0:?]Reference to space boundaries by virtue of the objectified relationship IfcRelSpaceBoundary. It defines the concept of an element bounding spaces. X
ConnectedFromIfcRelConnectsElements
@RelatedElement
S[0:?]Reference to the element connection relationship. The relationship then refers to the other element that is connected to this element. X
ContainedInStructureIfcRelContainedInSpatialStructure
@RelatedElements
S[0:1]Containment relationship to the spatial structure element, to which the element is primarily associated. This containment relationship has to be hierachical, i.e. an element may only be assigned directly to zero or one spatial structure. X
HasCoveringsIfcRelCoversBldgElements
@RelatingBuildingElement
S[0:?]Reference to IfcCovering by virtue of the objectified relationship IfcRelCoversBldgElement. It defines the concept of an element having coverings associated.X
IfcElementComponent
IfcReinforcingElement
9SteelGradeIfcLabel? Deprecated.
IFC4 CHANGE  Attribute deprecated. Use material association at IfcReinforcingElementType instead.
X
IfcReinforcingBar
10NominalDiameterIfcPositiveLengthMeasure? Deprecated.
IFC4 CHANGE  Attribute made optional and deprecated. Use respective attribute at IfcReinforcingBarType instead.
X
11CrossSectionAreaIfcAreaMeasure? The effective cross-section area of the reinforcing bar or group of bars.
IFC4 CHANGE  Attribute made optional.
X
12BarLengthIfcPositiveLengthMeasure? Deprecated.
IFC4 CHANGE  Attribute deprecated. Use respective attribute at IfcReinforcingBarType instead.
X
13PredefinedTypeIfcReinforcingBarTypeEnum? 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.
X
14BarSurfaceIfcReinforcingBarSurfaceEnum? Deprecated.
IFC4 CHANGE  Attribute made optional and deprecated. Use respective attribute at IfcReinforcingBarType instead.
X
Definitions applying to General Usage

 Instance diagram


Concept usage

Object Typing

The Object Typing concept template applies to this entity as shown in Table 669.

HasTypeRelatingType
IfcReinforcingBarType

Table 669 — IfcReinforcingBar Object Typing



Property Sets

The Property Sets for Objects concept template applies to this entity as shown in Table 670.

Table 670 — IfcReinforcingBar Property Sets for Objects



Quantity Sets

The Quantity Sets concept template applies to this entity as shown in Table 671.

QsetNameQuantities
Qto_ReinforcingElementBaseQuantities

Table 671 — IfcReinforcingBar Quantity Sets



Material Profile Set Usage

The Material Profile Set Usage concept template applies to this entity as shown in Table 672.

NameDescription
CoreMaterial from which the rebar is constructed, such as steel.
CoatingOuter coating, if applicable.

Table 672 — IfcReinforcingBar Material Profile Set Usage



Body Geometry

The Body Geometry concept template applies to this entity as shown in Table 673.

Table 673 — 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.



mvdXML Specification
<?xml version="1.0"?>
<ConceptRoot xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" uuid="7408889d-60ed-4f1a-9727-73fa21b07c52" name="IfcReinforcingBar" status="sample" applicableRootEntity="IfcReinforcingBar">
  <Applicability uuid="00000000-0000-0000-0000-000000000000" status="sample">
    <Template ref="7526dda5-ade3-4f4c-bf84-974866be469e" />
    <TemplateRules operator="and" />
  </Applicability>
  <Concepts>
    <Concept uuid="28db7ec9-5dce-426e-8f87-c04c684caaf0" name="Object Typing" status="sample" override="false">
      <Template ref="35a2e10e-20df-40f4-ab2f-dacf0a6744f4" />
      <TemplateRules operator="and">
        <TemplateRule Parameters="RelatingType[Type]='IfcReinforcingBarType'" />
      </TemplateRules>
    </Concept>
    <Concept uuid="2be959ca-69f6-47ef-9284-6bcbed7dbd6e" name="Property Sets" status="sample" override="false">
      <Template ref="f74255a6-0c0e-4f31-84ad-24981db62461" />
    </Concept>
    <Concept uuid="7b2209bc-7254-47ea-bbc1-a40e912718c1" name="Quantity Sets" status="sample" override="false">
      <Template ref="6652398e-6579-4460-8cb4-26295acfacc7" />
      <TemplateRules operator="and">
        <TemplateRule Parameters="QsetName[Value]='Qto_ReinforcingElementBaseQuantities'" />
      </TemplateRules>
    </Concept>
    <Concept uuid="a7be02c0-9f98-46ff-b92d-25e7949267aa" name="Material Profile Set Usage" status="sample" override="false">
      <Template ref="6aa01429-b566-4b36-875a-3162088a9831" />
      <TemplateRules operator="and">
        <TemplateRule Description="Material from which the rebar is constructed, such as steel." Parameters="Name[Value]='Core'" />
        <TemplateRule Description="Outer coating, if applicable." Parameters="Name[Value]='Coating'" />
      </TemplateRules>
    </Concept>
    <Concept uuid="6fd89bd2-e1b0-476b-b155-3d828767f6ee" name="Body Geometry" status="sample" override="false">
      <Template ref="c446bd16-2de3-4b97-b34f-4446ac0badc2" />
      <TemplateRules operator="and">
        <TemplateRule Parameters="" />
      </TemplateRules>
    </Concept>
  </Concepts>
</ConceptRoot>
Concept inheritance

#ConceptTemplateModel View
IfcRoot
IdentitySoftware IdentityGeneral Usage
Revision ControlRevision ControlGeneral Usage
IfcObjectDefinition
Classification AssociationClassification AssociationGeneral Usage
IfcObject
Object User IdentityObject User IdentityGeneral Usage
Object Predefined TypeObject Predefined TypeGeneral Usage
Property Sets with OverrideProperty Sets with OverrideGeneral Usage
IfcProduct
Product PlacementProduct PlacementGeneral Usage
Product Geometric RepresentationProduct Geometric RepresentationGeneral Usage
IfcElement
Product Local PlacementProduct Local PlacementGeneral Usage
CoG GeometryCoG GeometryGeneral Usage
Box GeometryBox GeometryGeneral Usage
FootPrint GeometryFootPrint GeometryGeneral Usage
Body SurfaceOrSolidModel GeometryBody SurfaceOrSolidModel GeometryGeneral Usage
Body SurfaceModel GeometryBody SurfaceModel GeometryGeneral Usage
Body Tessellation GeometryBody Tessellation GeometryGeneral Usage
Body Brep GeometryBody Brep GeometryGeneral Usage
Body AdvancedBrep GeometryBody AdvancedBrep GeometryGeneral Usage
Body CSG GeometryBody CSG GeometryGeneral Usage
Element VoidingElement VoidingGeneral Usage
Element ProjectingElement ProjectingGeneral Usage
Linear PlacementProduct Linear PlacementGeneral Usage
IfcElementComponent
Mapped GeometryMapped GeometryGeneral Usage
IfcReinforcingBar
Object TypingObject TypingGeneral Usage
Property SetsProperty Sets for ObjectsGeneral Usage
Quantity SetsQuantity SetsGeneral Usage
Material Profile Set UsageMaterial Profile Set UsageGeneral Usage
Body GeometryBody GeometryGeneral Usage
Examples
Formal representations
XML 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

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