7.8.3.10 IfcReinforcingMesh

Bewehrungsmatte
Treillis

A reinforcing mesh is a series of longitudinal and transverse wires or bars of various gauges, arranged at right angles to each other and welded at all points of intersection; usually used for concrete slab reinforcement. It is also known as welded wire fabric. In scope are plane meshes as well as bent meshes.

HISTORY  New entity in IFC2x2
IFC4 CHANGE  All attributes are optional now. Several attributes are deprecated; their information is now provided by IfcReinforcingMeshType. Attribute PredefinedType added.

Geometry Use Definition

Placement and representation are defined at the supertype IfcElementComponent.

The representation map of a mapped 'Outline' representation should contain a representation of type 'Curve3D' which holds an IfcPolyline.

The representation map of a mapped 'Body' representation should contain a representation of type 'AdvancedSweptSolid' which holds multiple 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 661.
Type
IfcReinforcingMeshType

Table 661 — IfcReinforcingMesh Object Typing



Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 662.
PredefinedTypeName
 Pset_Condition
 Pset_EnvironmentalImpactIndicators
 Pset_EnvironmentalImpactValues
 Pset_ManufacturerOccurrence
 Pset_ManufacturerTypeInformation
 Pset_PackingInstructions
 Pset_ServiceLife
 Pset_Warranty

Table 662 — IfcReinforcingMesh Property Sets for Objects



Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 663.
Name
Qto_ReinforcingElementBaseQuantities

Table 663 — IfcReinforcingMesh Quantity Sets



Body Geometry

The Body Geometry concept applies to this entity.

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




XSD Specification:

 <xs:element name="IfcReinforcingMesh" type="ifc:IfcReinforcingMesh" substitutionGroup="ifc:IfcReinforcingElement" nillable="true"/>
 <xs:complexType name="IfcReinforcingMesh">
  <xs:complexContent>
   <xs:extension base="ifc:IfcReinforcingElement">
    <xs:attribute name="MeshLength" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
    <xs:attribute name="MeshWidth" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
    <xs:attribute name="LongitudinalBarNominalDiameter" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
    <xs:attribute name="TransverseBarNominalDiameter" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
    <xs:attribute name="LongitudinalBarCrossSectionArea" type="ifc:IfcAreaMeasure" use="optional"/>
    <xs:attribute name="TransverseBarCrossSectionArea" type="ifc:IfcAreaMeasure" use="optional"/>
    <xs:attribute name="LongitudinalBarSpacing" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
    <xs:attribute name="TransverseBarSpacing" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
    <xs:attribute name="PredefinedType" type="ifc:IfcReinforcingMeshTypeEnum" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcReinforcingMesh
SUBTYPE OF IfcReinforcingElement;
MeshLength : OPTIONAL IfcPositiveLengthMeasure;
MeshWidth : OPTIONAL IfcPositiveLengthMeasure;
LongitudinalBarNominalDiameter : OPTIONAL IfcPositiveLengthMeasure;
TransverseBarNominalDiameter : OPTIONAL IfcPositiveLengthMeasure;
LongitudinalBarCrossSectionArea : OPTIONAL IfcAreaMeasure;
TransverseBarCrossSectionArea : OPTIONAL IfcAreaMeasure;
LongitudinalBarSpacing : OPTIONAL IfcPositiveLengthMeasure;
TransverseBarSpacing : OPTIONAL IfcPositiveLengthMeasure;
PredefinedType : OPTIONAL IfcReinforcingMeshTypeEnum;
WHERE
CorrectPredefinedType : NOT EXISTS(PredefinedType) OR (PredefinedType <> IfcReinforcingMeshTypeEnum.USERDEFINED) OR ((PredefinedType = IfcReinforcingMeshTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCSTRUCTURALELEMENTSDOMAIN.IFCREINFORCINGMESHTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType)) ;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

Attribute Definitions:

MeshLength : Deprecated.
IFC4 CHANGE  Attribute deprecated. Use respective attribute at IfcReinforcingMeshType instead.
MeshWidth : Deprecated.
IFC4 CHANGE  Attribute deprecated. Use respective attribute at IfcReinforcingMeshType instead.
LongitudinalBarNominalDiameter : Deprecated.
IFC4 CHANGE  Attribute made optional and deprecated. Use respective attribute at IfcReinforcingMeshType instead.
TransverseBarNominalDiameter : Deprecated.
IFC4 CHANGE  Attribute made optional and deprecated. Use respective attribute at IfcReinforcingMeshType instead.
LongitudinalBarCrossSectionArea : Deprecated.
IFC4 CHANGE  Attribute made optional and deprecated. Use respective attribute at IfcReinforcingMeshType instead.
TransverseBarCrossSectionArea : Deprecated.
IFC4 CHANGE  Attribute made optional and deprecated. Use respective attribute at IfcReinforcingMeshType instead.
LongitudinalBarSpacing : Deprecated.
IFC4 CHANGE  Attribute made optional and deprecated. Use respective attribute at IfcReinforcingMeshType instead.
TransverseBarSpacing : Deprecated.
IFC4 CHANGE  Attribute made optional and deprecated. Use respective attribute at IfcReinforcingMeshType instead.
PredefinedType : Kind of mesh.

Formal Propositions:

CorrectPredefinedType : Either the PredefinedType attribute is unset (e.g. because an IfcReinforcingMeshType 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 IfcReinforcingMeshType.

Inheritance Graph:

ENTITY IfcReinforcingMesh
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 IfcReinforcingMesh
MeshLength : OPTIONAL IfcPositiveLengthMeasure;
MeshWidth : OPTIONAL IfcPositiveLengthMeasure;
LongitudinalBarNominalDiameter : OPTIONAL IfcPositiveLengthMeasure;
TransverseBarNominalDiameter : OPTIONAL IfcPositiveLengthMeasure;
LongitudinalBarCrossSectionArea : OPTIONAL IfcAreaMeasure;
TransverseBarCrossSectionArea : OPTIONAL IfcAreaMeasure;
LongitudinalBarSpacing : OPTIONAL IfcPositiveLengthMeasure;
TransverseBarSpacing : OPTIONAL IfcPositiveLengthMeasure;
PredefinedType : OPTIONAL IfcReinforcingMeshTypeEnum;
END_ENTITY;

Link to this page  Link to this page