|Stab / Stabträger - Typ|
|Type de membre|
The element type
IfcMemberType defines commonly shared information for
occurrences of members. Members are predominately linear building
elements, often forming part of a structural system. The
orientation of the member (being horizontal, vertical or sloped)
is not relevant to its definition (in contrary to beam and
column). The set of shared information may include:
- common properties within shared property sets
- common material information
- common profile definitions
- common shape representations
It is used to define a member specification, or member style
(the specific product information that is common to all
occurrences of that member type). Member types may be exchanged
without being already assigned to occurrences.
Occurrences of the IfcMemberType within building models
are represented by instances of IfcMemberStandardCase if
the IfcMemberType has a single associated
IfcMaterialProfileSet; otherwise they are represented by
instances of IfcMember. Occurrences of the
IfcMemberType within structural analysis models are
represented by instances of IfcStructuralCurveMember, or
its applicable subtypes.
HISTORY New entity in IFC2x2 Addendum 1.
Common Use Definitions
The following concepts are inherited at supertypes:
Material Profile Set
The Material Profile Set concept applies to this entity.
The material of the IfcMemberType is defined by the
IfcMaterialProfileSet or as fall back by
IfcMaterial and attached by the
IfcRelAssociatesMaterial.RelatingMaterial. It is
accessible by the inverse HasAssociations
NOTE It is illegal to assign an IfcMaterial to an IfcMemberType, if there is at least one occurrences of IfcMemberStandardCase for this type.
The shared profile definition is defined by assigning an
IfcMaterialProfileSet (see material use definition above).
The IfcMaterialProfile refers to the subtype of
IfcProfileDef that is the common profile for all member
occurrence, if used. It is only applicable if the
IfcMemberType has only occurrences of type
IfcMemberStandardCase (see definition of
IfcMemberStandardCase for further information).
NOTE The attribute ProfileName of the
IfcProfileDef subtype, referenced in
IfcMaterialProfile should contain a standardized profile
name according to local standards. However, an additional
geometric representation of the profile is necessary (e.g. as
IfcExtrudedAreaSolid). An importing application is allowed
to check for the existence of the profile name: in case of
identifying it as a standardized name, the corresponding profile
geometry and possibly other cross sectional properties can be
read from a library. Otherwise the geometric representation and
possible non geometric IfcProfileProperties have to be
Type Body Geometry
The Type Body Geometry concept applies to this entity.
The IfcMemberType may define the shared geometric representation for all member occurrences. The RepresentationMaps attribute refers to a list of IfcRepresentationMap's, that allow for multiple geometric representations (e.g. with IfcShaperepresentation's having an RepresentationIdentifier 'Box', 'Axis', or 'Body'). It is only applicable if the IfcMemberType has only occurrences of type IfcMember (See geometric use definition of IfcMember for further information).
NOTE If the IfcMemberType has an associated IfcMaterialProfileSet, then no shared geometric representation shall be provided.
NOTE The product shape representations are defined as RepresentationMaps (attribute of the supertype IfcTypeProduct), which get assigned by an element occurrence instance through the IfcShapeRepresentation.Item[n] being an IfcMappedItem. See IfcTypeProduct for further information.
NOTE The values of attributes RepresentationIdentifier and RepresentationType of IfcShapeRepresentation are restricted in the same way as those for IfcMember and IfcMemberStandardCase
XSD Specification: <xs:element name="IfcMemberType" type="ifc:IfcMemberType" substitutionGroup="ifc:IfcBuildingElementType" nillable="true"/>
<xs:attribute name="PredefinedType" type="ifc:IfcMemberTypeEnum" use="optional"/>
|CorrectPredefinedType|| : ||(PredefinedType <> IfcMemberTypeEnum.USERDEFINED) OR
((PredefinedType = IfcMemberTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcElementType.ElementType));|
|PredefinedType|| : ||
Identifies the predefined types of a linear structural member element from which the type required may be set.
|CorrectPredefinedType|| : ||
The inherited attribute ElementType shall be provided, if the PredefinedType is set to USERDEFINED.
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