IfcReinforcingMeshType

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcReinforcingMeshType			ADDED

Semantic definitions at the entity

Entity definition

The reinforcing element type IfcReinforcingMeshType defines commonly shared information for occurrences of reinforcing meshs. The set of shared information may include:

common properties with shared property sets
common representations
common materials
common composition of elements

It is used to define a reinforcing mesh type specification indicating the specific product information that is common to all occurrences of that product type. The IfcReinforcingMeshType may be declared within IfcProject or IfcProjectLibrary using IfcRelDeclares and may be exchanged with or without occurrences of the type. Occurrences of IfcReinforcingMeshType are represented by instances of IfcReinforcingMesh.

HISTORY New entity in IFC4.

Geometry Use Definition

The IfcReinforcingMeshType may define the shared geometric representation for many mesh occurrences. The RepresentationMaps attribute refers to a list of IfcRepresentationMap's, that allow for multiple geometric representations.

Attribute definitions

#	Attribute	Type	Cardinality	Description	B
10	PredefinedType	IfcReinforcingMeshTypeEnum	[1:1]	Subtype of reinforcing mesh.	X
11	MeshLength	IfcPositiveLengthMeasure	[0:1]	The overall length of the mesh measured in its longitudinal direction.	X
12	MeshWidth	IfcPositiveLengthMeasure	[0:1]	The overall width of the mesh measured in its transversal direction.	X
13	LongitudinalBarNominalDiameter	IfcPositiveLengthMeasure	[0:1]	The nominal diameter denoting the cross-section size of the longitudinal bars.	X
14	TransverseBarNominalDiameter	IfcPositiveLengthMeasure	[0:1]	The nominal diameter denoting the cross-section size of the transverse bars.	X
15	LongitudinalBarCrossSectionArea	IfcAreaMeasure	[0:1]	The effective cross-section area of the longitudinal bars of the mesh.	X
16	TransverseBarCrossSectionArea	IfcAreaMeasure	[0:1]	The effective cross-section area of the transverse bars of the mesh.	X
17	LongitudinalBarSpacing	IfcPositiveLengthMeasure	[0:1]	The spacing between the longitudinal bars. Note: an even distribution of bars is presumed; other cases are handled by classification or property sets.	X
18	TransverseBarSpacing	IfcPositiveLengthMeasure	[0:1]	The spacing between the transverse bars. Note: an even distribution of bars is presumed; other cases are handled by classification or property sets.	X
19	BendingShapeCode	IfcLabel	[0:1]	If this mesh type is bent rather than planar, this attribute provides a shape code per a standard like ACI 315, ISO 3766, or a similar standard. It is presumed that a single standard for defining the mesh bending is used throughout the project and that this standard is referenced from the IfcProject object through the IfcDocumentReference mechanism.	X
20	BendingParameters	IfcBendingParameterSelect	L[1:?]	If this mesh type is bent rather than planar, this attribute provides bending shape parameters. Their meaning is defined by the bending shape code and the respective standard.	X

Formal Propositions

Rule	Description
CorrectPredefinedType	The inherited attribute ElementType shall be provided if the PredefinedType is set to USERDEFINED.
BendingShapeCodeProvided	Bending parameters must be accompanied by a shape code.

Inherited definitions from supertypes

Entity inheritance

Attribute inheritance

#	Attribute	Type	Cardinality	Description	B
IfcRoot
1	GlobalId	IfcGloballyUniqueId	[1:1]	Assignment of a globally unique identifier within the entire software world.	X
2	OwnerHistory	IfcOwnerHistory	[0:1]	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.	X
3	Name	IfcLabel	[0:1]	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
4	Description	IfcText	[0:1]	Optional description, provided for exchanging informative comments.	X
IfcObjectDefinition
	HasAssignments	IfcRelAssigns @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
	Nests	IfcRelNests @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).
	IsNestedBy	IfcRelNests @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).	X
	HasContext	IfcRelDeclares @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.
	IsDecomposedBy	IfcRelAggregates @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).	X
	Decomposes	IfcRelAggregates @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).	X
	HasAssociations	IfcRelAssociates @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
IfcTypeObject
5	ApplicableOccurrence	-		This attribute is out of scope for this model view definition and shall not be set.
6	HasPropertySets	IfcPropertySetDefinition	S[1:?]	Set ~~list~~ of unique property sets, that are associated with the object type and are common to all object occurrences referring to this object type.	X
	Types	IfcRelDefinesByType @RelatingType	S[0:1]	Reference to the relationship IfcRelDefinedByType and thus to those occurrence objects, which are defined by this type.
IfcTypeProduct
7	RepresentationMaps	IfcRepresentationMap	~L[1:?]	List of unique representation maps. Each representation map describes a block definition of the shape of the product style. By providing more than one representation map, a multi-view block definition can be given.	X
8	Tag	-		This attribute is out of scope for this model view definition and shall not be set.
	ReferencedBy	IfcRelAssignsToProduct @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 type.
IfcElementType
9	ElementType	-		This attribute is out of scope for this model view definition and shall not be set.
IfcElementComponentType
IfcReinforcingElementType
IfcReinforcingMeshType
10	PredefinedType	IfcReinforcingMeshTypeEnum	[1:1]	Subtype of reinforcing mesh.	X
11	MeshLength	IfcPositiveLengthMeasure	[0:1]	The overall length of the mesh measured in its longitudinal direction.	X
12	MeshWidth	IfcPositiveLengthMeasure	[0:1]	The overall width of the mesh measured in its transversal direction.	X
13	LongitudinalBarNominalDiameter	IfcPositiveLengthMeasure	[0:1]	The nominal diameter denoting the cross-section size of the longitudinal bars.	X
14	TransverseBarNominalDiameter	IfcPositiveLengthMeasure	[0:1]	The nominal diameter denoting the cross-section size of the transverse bars.	X
15	LongitudinalBarCrossSectionArea	IfcAreaMeasure	[0:1]	The effective cross-section area of the longitudinal bars of the mesh.	X
16	TransverseBarCrossSectionArea	IfcAreaMeasure	[0:1]	The effective cross-section area of the transverse bars of the mesh.	X
17	LongitudinalBarSpacing	IfcPositiveLengthMeasure	[0:1]	The spacing between the longitudinal bars. Note: an even distribution of bars is presumed; other cases are handled by classification or property sets.	X
18	TransverseBarSpacing	IfcPositiveLengthMeasure	[0:1]	The spacing between the transverse bars. Note: an even distribution of bars is presumed; other cases are handled by classification or property sets.	X
19	BendingShapeCode	IfcLabel	[0:1]	If this mesh type is bent rather than planar, this attribute provides a shape code per a standard like ACI 315, ISO 3766, or a similar standard. It is presumed that a single standard for defining the mesh bending is used throughout the project and that this standard is referenced from the IfcProject object through the IfcDocumentReference mechanism.	X
20	BendingParameters	IfcBendingParameterSelect	L[1:?]	If this mesh type is bent rather than planar, this attribute provides bending shape parameters. Their meaning is defined by the bending shape code and the respective standard.	X

Definitions applying to Bridge View

Instance diagram

Figure 65 — Reinforcing mesh model

Concept usage

Type Element Aggregation

The Type Element Aggregation concept applies to this entity as shown in Table 98.

PredefinedType	RelatedObjects
	IfcReinforcingBar

Table 98 — IfcReinforcingMeshType Type Element Aggregation

Exchange
Import	R	R
Export	R	R

Reinforcing Mesh Type Attributes

The Reinforcing Mesh Type Attributes concept applies to this entity.

Exchange
Import		R
Export		R

Concept inheritance

#	Concept	Model View
IfcRoot
	Software Identity	Bridge View
	User Identity	Bridge View
	Object Ownership	Bridge View
IfcTypeObject
	Property Sets for Types	Bridge View
IfcReinforcingMeshType
	Type Element Aggregation	Bridge View
	Reinforcing Mesh Type Attributes	Bridge View

Formal representations

XSD Specification

 <xs:element name="IfcReinforcingMeshType" type="ifc:IfcReinforcingMeshType" substitutionGroup="ifc:IfcReinforcingElementType" nillable="true"/>

 <xs:complexType name="IfcReinforcingMeshType">

  <xs:complexContent>

   <xs:extension base="ifc:IfcReinforcingElementType">

    <xs:sequence>

     <xs:element name="BendingParameters" nillable="true" minOccurs="0">

      <xs:complexType>

       <xs:group ref="ifc:IfcBendingParameterSelect" maxOccurs="unbounded"/>

       <xs:attribute ref="ifc:itemType" fixed="ifc:IfcBendingParameterSelect"/>

       <xs:attribute ref="ifc:cType" fixed="list"/>

       <xs:attribute ref="ifc:arraySize" use="optional"/>

      </xs:complexType>

     </xs:element>

    </xs:sequence>

    <xs:attribute name="PredefinedType" type="ifc:IfcReinforcingMeshTypeEnum" use="optional"/>

    <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="BendingShapeCode" type="ifc:IfcLabel" use="optional"/>

   </xs:extension>

  </xs:complexContent>

 </xs:complexType>

EXPRESS Specification


ENTITY IfcReinforcingMeshType

 SUBTYPE OF (IfcReinforcingElementType);

  PredefinedType : IfcReinforcingMeshTypeEnum;

  MeshLength : OPTIONAL IfcPositiveLengthMeasure;

  MeshWidth : OPTIONAL IfcPositiveLengthMeasure;

  LongitudinalBarNominalDiameter : OPTIONAL IfcPositiveLengthMeasure;

  TransverseBarNominalDiameter : OPTIONAL IfcPositiveLengthMeasure;

  LongitudinalBarCrossSectionArea : OPTIONAL IfcAreaMeasure;

  TransverseBarCrossSectionArea : OPTIONAL IfcAreaMeasure;

  LongitudinalBarSpacing : OPTIONAL IfcPositiveLengthMeasure;

  TransverseBarSpacing : OPTIONAL IfcPositiveLengthMeasure;

  BendingShapeCode : OPTIONAL IfcLabel;

  BendingParameters : OPTIONAL LIST [1:?] OF IfcBendingParameterSelect;

 WHERE

  CorrectPredefinedType : (PredefinedType <> IfcReinforcingMeshTypeEnum.USERDEFINED) OR
((PredefinedType = IfcReinforcingMeshTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcElementType.ElementType));
  BendingShapeCodeProvided : NOT EXISTS(BendingParameters) OR EXISTS(BendingShapeCode);
END_ENTITY;

 EXPRESS-G diagram

Link to this page

	Bewehrungsmatte - Typ
	Reinforcing Mesh Type
	Type de treillis