|Decke / Dachfläche / Bodenplatte - Typ|
|Type de dalle|
The element type IfcSlabType defines commonly shared
information for occurrences of slabs. The set of shared information
- 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 IfcSlabStandardCase.
It is used to define a slab specification (i.e. the specific
product information, that is common to all occurrences of that
product type). Slab 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
The occurrences of the IfcSlabType within building models
are represented by instances of IfcSlabStandardCase if the
IfcSlabType has a single associated
IfcMaterialLayerSet; otherwise they are represented by
instances of IfcSlab, or IfcSlabElementedCase.
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 IfcSlabType is defined by the
IfcMaterialLayerSet or as fall back by IfcMaterial
and attached by the
IfcRelAssociatesMaterial.RelatingMaterial. It is
accessible by the inverse HasAssociations relationship.
NOTE It is illegal to assign an
IfcMaterial to an IfcSlabType, if there is at least
one occurrences. of IfcSlabStandardCase 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
IfcMaterial that is the common for all slab occurrence, if
used. It is only applicable if the IfcSlabType has only
occurrences of type IfcSlabStandardCase (see definition of
IfcSlabStandardCase for further information).
NOTE Since each individual instance of
IfcSlabStandardCase defines its own
IfcMaterialLayerSetUsage including the offset from the
reference plane, the same IfcSlabType can be used
independently of the reference plane alignment of its
Type Body Geometry
The Type Body Geometry concept applies to this entity.
XSD Specification: <xs:element name="IfcSlabType" type="ifc:IfcSlabType" substitutionGroup="ifc:IfcBuildingElementType" nillable="true"/>
<xs:attribute name="PredefinedType" type="ifc:IfcSlabTypeEnum" use="optional"/>
|CorrectPredefinedType|| : ||(PredefinedType <> IfcSlabTypeEnum.USERDEFINED) OR
((PredefinedType = IfcSlabTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcElementType.ElementType));|
|PredefinedType|| : ||
Identifies the predefined types of a slab 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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