IfcMemberStandardCase

Natural language names
Stab / Stabträger - Standard
Member Standard Case
Membre standard
Change log
DEPRECATEDThis definition may be imported, but shall not be exported by applications.
ItemSPFXMLChangeDescription
IFC2x3 to IFC4 4.0.0.0
    IfcMemberStandardCaseADDED
IFC4 Addendum 2 Technical Corrigendum 1 4.0.2.1
    IfcMemberStandardCaseMODIFIEDStatus changed to Deprecated.
IFC4x2 Candidate 4.2.0.0
    IfcMemberStandardCase
      PositionedRelativeToADDED
IFC2x3 to IFC4 4.0.0.0
    IfcMemberStandardCaseADDED
IFC4 Addendum 2 Technical Corrigendum 1 4.0.2.1
    IfcMemberStandardCaseMODIFIEDStatus changed to Deprecated.
IFC4x2 Candidate 4.2.0.0
    IfcMemberStandardCase
      PositionedRelativeToADDED
Semantic definitions at the entity
Entity definition

The standard member, IfcMemberStandardCase, defines a member with certain constraints for the provision of material usage, parameters and with certain constraints for the geometric representation. The IfcMemberStandardCase handles all cases of members, that:

NOTE  View definitions and implementer agreements may further constrain the applicable geometry types, such as by excluding tapering from an IfcMemberStandardCase implementation.

HISTORY  New entity in IFC4.

Formal Propositions
RuleDescription
HasMaterialProfileSetUsageA valid instance of IfcMemberStandardCase relies on the provision of an IfcMaterialProfileSetUsage.
Inherited definitions from supertypes
Entity inheritance IfcMember IfcBuiltElement 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
ReferencedInStructuresIfcRelReferencedInSpatialStructure
@RelatedElements
S[0:?]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
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
IfcBuiltElement
IfcMember
9PredefinedTypeIfcMemberTypeEnum? Predefined generic type for a member that is specified in an enumeration. There may be a property set given for the predefined types.
NOTE  The PredefinedType shall only be used, if no IfcMemberType is assigned, providing its own IfcMemberType.PredefinedType.
IFC4 CHANGE The attribute has been added at the end of the entity definition.
X
IfcMemberStandardCase
Definitions applying to General Usage

 Instance diagram


Concept usage

Object Typing

The Object Typing concept template applies to this entity as shown in Table 145.

HasTypeRelatingType
IfcMemberType

Table 145 — IfcMemberStandardCase Object Typing

The IfcMemberStandardCase defines in addition that the IfcMemberType should have a unique IfcMaterialProfileSet, that is referenced by the IfcMaterialProfileSetUsage assigned to all occurrences of this IfcMemberType.



Material Profile Set Usage

The Material Profile Set Usage concept applies to this entity.

Figure 222 illustrates assignment of IfcMaterialProfileSetUsage and IfcMaterialProfileSet to the IfcMemberStandardCase as the member occurrence and to the IfcMemberType. The same IfcMaterialProfileSet shall be shared by many occurrences of IfcMaterialProfileSetUsage. This relationship shall be consistent to the relationship between the IfcMemberType and the IfcMemberStandardCase.

"Material profile set and usage"

Figure 222 — Member profile usage

Figure 223 illustrates assignment of a composite profile by using IfcCompositeProfile for geometric representation and several IfcMaterialProfile's within the IfcMaterialProfileSet. The number of IfcMaterialProfile's within the IfcMaterialProfileSet is restricted to maximal 2 and requires the use of IfcExtrudedAreaSolidTapered, or IfcRevolvedAreaSolidTapered for the correct 'Body' shape representation.

"Material profile set and usage"

Figure 223 — Member composite profiles

The material of the IfcMemberStandardCase is defined by IfcMaterialProfileSetUsage and attached by the IfcRelAssociatesMaterial.RelatingMaterial. It is accessible by the inverse HasAssociations relationship. Composite profile members can be represented by refering to several IfcMaterialProfile's within the IfcMaterialProfileSet that is referenced from the IfcMaterialProfileSetUsage.

Material information can also be given at the IfcMemberType, defining the common attribute data for all occurrences of the same type. It is then accessible by the inverse IsDefinedBy relationship pointing to IfcMemberType.HasAssociations and via IfcRelAssociatesMaterial.RelatingMaterial. See Type Use Definition for additional agreements for standard members.



Product Placement

The Product Local Placement concept template applies to this entity as shown in Table 146.

Table 146 — IfcMemberStandardCase Product Local Placement

The following restriction is imposed:



Axis 3D Geometry

The Axis 3D Geometry concept template applies to this entity as shown in Table 147.

Table 147 — IfcMemberStandardCase Axis 3D Geometry

The following additional constraints apply to the 'Axis' representation, if the 'Body' shape representation has the RepresentationType : 'SweptSolid':

 

Axis
EXAMPLE  As shown in Figure 101, the axis representation can be used to represent the system length of a member that may extent the body length of the member.

Figure 224 — Member axis representation

 
Axis
EXAMPLE  As shown in Figure 102, the axis representation shall be used to represent the cardinal point as the offset between the 'Axis' and the extrusion path of the member. The extrusion path is provided as IfcExtrudedAreaSolid.ExtrudedDirection and should be parallel to the 'Axis'. It has to be guaranteed that the value provided by IfcMaterialProfileSetUsage.CardinalPoint is consistent to the IfcExtrudedAreaSolid.Position.

Figure 225 — Member axis cardinal point

 


Body SweptSolid Geometry

The Body SweptSolid Geometry concept applies to this entity.

The following additional constraints apply to the 'SweptSolid' representation:

Figure 226 illustrates a 'SweptSolid' geometric representation with cardinal point applied as 1 (bottom left).

The following interpretation of dimension parameter applies for rectangular members:

The following interpretation of dimension parameter applies for circular members:

"standard member"

Figure 226 — Member body extrusion



Body AdvancedSweptSolid Geometry

The Body AdvancedSweptSolid Geometry concept applies to this entity.

The following additional constraints apply to the 'AdvancedSweptSolid' representation type:

NOTE  View definitions and implementer agreement can further constrain the allowed swept solid types. NOTE  Using IfcExtrudedAreaSolidTapered, or IfcRevolvedAreaSolidTapered requires the use of two IfcMaterialProfile's within the IfcMaterialProfileSet assinged to the IfcBeamStandardCase



Body Clipping Geometry

The Body Clipping Geometry concept applies to this entity.

The following constraints apply to the advanced representation:

Figure 227 illustrates an advanced geometric representation with use of IfcBooleanClippingResult between an IfcExtrudedAreaSolid and an IfcHalfSpaceSolid to create a clipped body, with cardinal point applied as 4 (mid-depth left).

"clipped beam"

Figure 227 — Member body clipping



mvdXML Specification
<?xml version="1.0" encoding="utf-8"?>
<ConceptRoot xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" uuid="318e622e-3845-4a77-9f24-e743c5634818" name="IfcMemberStandardCase" applicableRootEntity="IfcMemberStandardCase">
 <Applicability>
  <Template ref="8458ce0e-68bd-470b-9550-a6e82b7a15ad" />
  <TemplateRules operator="and">
  </TemplateRules>
 </Applicability>
 <Concepts>
  <Concept uuid="7738f5d7-708e-453d-acd3-98369c083940" name="Object Typing">
   <Template ref="35a2e10e-20df-40f4-ab2f-dacf0a6744f4" />
   <TemplateRules operator="and">
    <TemplateRule Parameters="RelatingType[Type]=&apos;IfcMemberType&apos;" />
   </TemplateRules>
  </Concept>
  <Concept uuid="d8799c9b-4314-4b4e-892c-71876a10c233" name="Material Profile Set Usage">
   <Template ref="6aa01429-b566-4b36-875a-3162088a9831" />
  </Concept>
  <Concept uuid="b6a21ed7-2ea7-4146-a83e-7a6320c89ca7" name="Product Placement">
   <Template ref="cbe85b5f-7912-4a43-8bb7-1e63bf40b26d" />
  </Concept>
  <Concept uuid="546014f1-7a14-4700-89a0-de4866526669" name="Axis 3D Geometry">
   <Template ref="b894d8cb-fb41-45ec-ba18-72cac6baff34" />
  </Concept>
  <Concept uuid="fc6ffae2-2f64-4c72-91db-3cc23b404dcb" name="Body SweptSolid Geometry">
   <Template ref="cb7c18fa-cf83-4db1-be1b-c013ba4ed672" />
  </Concept>
  <Concept uuid="9002a781-c364-4efd-b5fa-030744d36b5c" name="Body AdvancedSweptSolid Geometry">
   <Template ref="5464785d-e5d1-4f75-9ecc-6cb39214705e" />
  </Concept>
  <Concept uuid="4d15430a-d638-4fd3-bc27-9b62ac85107d" name="Body Clipping Geometry">
   <Template ref="2cdbc2f5-9b0c-43ea-9d2a-9d72d0147e00" />
  </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
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
Mapped GeometryMapped GeometryGeneral Usage
Element VoidingElement VoidingGeneral Usage
Element ProjectingElement ProjectingGeneral Usage
Linear PlacementProduct Linear PlacementGeneral Usage
IfcBuiltElement
Surface 3D GeometrySurface 3D GeometryGeneral Usage
IfcMember
Property Sets for ObjectsProperty Sets for ObjectsGeneral Usage
Quantity SetsQuantity SetsGeneral Usage
Material Profile SetMaterial Profile SetGeneral Usage
Spatial ContainmentSpatial ContainmentGeneral Usage
Product AssignmentProduct AssignmentGeneral Usage
IfcMemberStandardCase
Object TypingObject TypingGeneral Usage
Material Profile Set UsageMaterial Profile Set UsageGeneral Usage
Product PlacementProduct Local PlacementGeneral Usage
Axis 3D GeometryAxis 3D GeometryGeneral Usage
Body SweptSolid GeometryBody SweptSolid GeometryGeneral Usage
Body AdvancedSweptSolid GeometryBody AdvancedSweptSolid GeometryGeneral Usage
Body Clipping GeometryBody Clipping GeometryGeneral Usage
Formal representations
XML Specification
 <xs:element name="IfcMemberStandardCase" type="ifc:IfcMemberStandardCase" substitutionGroup="ifc:IfcMember" nillable="true"/>
 <xs:complexType name="IfcMemberStandardCase">
  <xs:complexContent>
   <xs:extension base="ifc:IfcMember"/>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcMemberStandardCase
 SUBTYPE OF (IfcMember);
 WHERE
  HasMaterialProfileSetUsage : SIZEOF (QUERY(temp <* USEDIN(SELF, 'IFCKERNEL.IfcRelAssociates.RELATEDOBJECTS') |
('IFCPRODUCTEXTENSION.IfcRelAssociatesMaterial' IN TYPEOF(temp)) AND
('IFCMATERIALRESOURCE.IfcMaterialProfileSetUsage' IN TYPEOF(temp.RelatingMaterial))
)) = 1;
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

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