The element type
IfcWallType defines commonly shared information for
occurrences of walls. The set of shared information may
- common properties within shared property sets
- common material information
- common material layer definitions
- common shape representations
NOTE It is illegal to share shape representations as representation maps for occurrences of IfcWallStandardcase.
It is used to define a wall specification (i.e. the specific
product information, that is common to all occurrences of that
product type). Wall types may be exchanged without being already
assigned to occurrences.
NOTE The product representations are defined
as representation maps (at the level of the supertype
IfcTypeProduct, which gets assigned by an element
occurrence instance through the
IfcShapeRepresentation.Item being an
Occurrences of the IfcWallType within building models
are represented by instances of IfcWallStandardCase if the
IfcWallType has a single associated
IfcMaterialLayerSet; otherwise they are represented by
instances of IfcWall, or IfcWallElementedCase.
Occurrences of the IfcWallType within structural analysis
models are represented by instances of
IfcStructuralSurfaceMember, or its applicable
HISTORY New entity in IFC2x2.
- The material assignment, if provided using the
IfcRelAssociatesMaterial relationship, shall not reference
Common Use Definitions
The following concepts are inherited at supertypes:
Material Layer Set
The Material Layer Set concept applies to this entity.
The material of the IfcWallType is defined by the
IfcMaterialLayerSet 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 IfcWallType, if there is at least
one occurrences. of IfcWallStandardCase for this
The shared material layer set definition is defined by
assigning an IfcMaterialLayerSet (see material use
definition above). The IfcMaterialLayer refers to one or
several of IfcMaterialLayer that is the common for all
wall occurrence, if used. It is only applicable if the
IfcWallType has only occurrences of type
IfcWallStandardCase (see definition of
IfcWallStandardCase for further information).
NOTE Since each individual instance of
IfcWallStandardCase defines its own
IfcMaterialLayerSetUsage including the offset from the
wall axis, the same IfcWallType can be used independently
of the axis alignment of its occurrences.
Type Body Geometry
The Type Body Geometry concept applies to this entity.
XSD Specification: <xs:element name="IfcWallType" type="ifc:IfcWallType" substitutionGroup="ifc:IfcBuildingElementType" nillable="true"/>
<xs:attribute name="PredefinedType" type="ifc:IfcWallTypeEnum" use="optional"/>
|CorrectPredefinedType|| : ||(PredefinedType <> IfcWallTypeEnum.USERDEFINED) OR
((PredefinedType = IfcWallTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcElementType.ElementType));|
|PredefinedType|| : ||
Identifies the predefined types of a wall 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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