IfcMemberStandardCase

Rule	Description
HasMaterialProfileSetUsage	A valid instance of IfcMemberStandardCase relies on the provision of an IfcMaterialProfileSetUsage.

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
IfcObject
5	ObjectType	-		This attribute is out of scope for this model view definition and shall not be set.
	IsTypedBy	IfcRelDefinesByType @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.	X
	IsDefinedBy	IfcRelDefinesByProperties @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.	X
IfcProduct
6	ObjectPlacement	IfcObjectPlacement	[0:1]	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
7	Representation	IfcProductRepresentation	[0:1]	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
	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.	X
IfcElement
8	Tag	IfcIdentifier	[0:1]	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
	ConnectedTo	IfcRelConnectsElements @RelatingElement	S[0:?]	Reference to the element connection relationship. The relationship then refers to the other element to which this element is connected to.
	HasOpenings	IfcRelVoidsElement @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
	ConnectedFrom	IfcRelConnectsElements @RelatedElement	S[0:?]	Reference to the element connection relationship. The relationship then refers to the other element that is connected to this element.	X
	ContainedInStructure	IfcRelContainedInSpatialStructure @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.
	PositionedFrom	IfcRelPositions @RelatingElement	S[0:1]	Indicates a constrained placement, where the ObjectPosition must match positioning defined according to the referenced positioning element.	X
IfcBuildingElement
IfcMember
9	PredefinedType	IfcMemberTypeEnum	[0:1]	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.	X
IfcMemberStandardCase

Definitions applying to Bridge View

Instance diagram

Members are used to represent linear members with primary function of axial loading such as angles as part of cross-bracing. The general definition IfcMember defines a fixed shape, while the subtype IfcMemberStandardCase allows for parametric resizing.

Concept usage

Material Profile Set Usage

The Material Profile Set Usage concept applies to this entity.

Figure 181 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.

Figure 181 — Member profile usage

Figure 182 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.

Figure 182 — 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.

Body SweptSolid ParameterizedProfile Geometry

The Body SweptSolid ParameterizedProfile Geometry concept applies to this entity.

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

Solid: IfcExtrudedAreaSolid, IfcRevolvedAreaSolid shall be supported
Profile: all subtypes of IfcProfileDef (with exception of IfcArbitraryOpenProfileDef)
Profile Position : For all single profiles, the IfcParameterizedProfileDef.Position shall be NIL, or having Location = 0.,0. and RefDirection = 1.,0.
Extrusion: perpendicular to the profile direction.
Orientation: The y-axis of the profile, as determined by IfcSweptAreaSolid.Position.P[2] shall point to the Z-Axis. It indicates the "role" of the column, a role=0° means y-axis of profile = Z-axis of reference coordinate system. In the exception of a vertical member, the y-axis shall point to the Y-axis.

Figure 182 illustrates a 'SweptSolid' geometric representation with cardinal point applied as 1 (bottom left).

The following interpretation of dimension parameter applies for rectangular members:

IfcRectangleProfileDef.YDim interpreted as member width
IfcRectangleProfileDef.XDim interpreted as member depth

The following interpretation of dimension parameter applies for circular members:

IfcCircleProfileDef.Radius interpreted as beam radius.

Figure 182 — 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:

Solid: IfcSurfaceCurveSweptAreaSolid, IfcFixedReferenceSweptAreaSolid, IfcExtrudedAreaSolidTapered, IfcRevolvedAreaSolidTapered shall be supported.
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
Profile: see 'SweptSolid' geometric representation
Profile Position : see 'SweptSolid' geometric representation
Extrusion: not applicable

Body Clipping Geometry

The Body Clipping Geometry concept applies to this entity.

The following constraints apply to the advanced representation:

Solid: see 'SweptSolid' geometric representation
Profile: see 'SweptSolid' geometric representation
Profile Position : see 'SweptSolid' geometric representation
Extrusion: see 'SweptSolid' geometric representation
Boolean result: The IfcBooleanClippingResult shall be supported, allowing for Boolean differences between the swept solid (here IfcExtrudedAreaSolid) and one or several IfcHalfSpaceSolid (or its subtypes).

Figure 183 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).

Figure 183 — Member body clipping

Concept inheritance

#	Concept	Model View
IfcRoot
	Software Identity	Bridge View
	User Identity	Bridge View
	Object Ownership	Bridge View
IfcObject
	Property Sets for Objects	Bridge View
IfcElement
	Element Occurrence Attributes	Bridge View
	Product Local Placement	Bridge View
	Product Assignment	Bridge View
IfcMember
	Object Typing	Bridge View
	Quantity Sets	Bridge View
	Element Decomposition	Bridge View
	Element Nesting	Bridge View
	Body SweptSolid Geometry	Bridge View
	Annotation 2D Geometry	Bridge View
	Surface Connectivity	Bridge View
IfcMemberStandardCase
	Material Profile Set Usage	Bridge View
	Body SweptSolid ParameterizedProfile Geometry	Bridge View
	Body AdvancedSweptSolid Geometry	Bridge View
	Body Clipping Geometry	Bridge View

Formal representations

XSD 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;

 EXPRESS-G diagram

Link to this page

Item	SPF	XML	Change	Description
IFC2x3 to IFC4
IfcMemberStandardCase			ADDED
IFC4x1 to IFC4x2
IfcMemberStandardCase
PositionedFrom			ADDED

	Stab / Stabträger - Standard
	Member Standard Case
	Membre standard

IfcMemberStandardCase

Semantic definitions at the entity

Inherited definitions from supertypes

Definitions applying to Bridge View

Formal representations