IfcPlate

Natural language names
dePlatte / Paneel
enPlate
frPlaque
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4
    IfcPlate
      OwnerHistoryMODIFIEDInstantiation changed to OPTIONAL.
      PredefinedTypeADDED
Semantic definitions at the entity
Entity definition

An IfcPlate is a planar and often flat part with constant thickness. A plate may carry loads between or beyond points of support, or provide stiffening. The location of the plate (being horizontal, vertical or sloped) is not relevant to its definition (in contrary to IfcWall and IfcSlab (as floor slab)). 

NOTE  Definition according to ISO 6707-1: thin, rigid, flat, metal product, of a thickness greater than that of a sheet.

Plates are normally made of steel, other metallic material, or by glass panels. However the definition of IfcPlate is material independent and specific material information shall be handled by using IfcAssociatesMaterial to assign a material specification to the IfcPlate.

NOTE  Although not necessarily, plates are often add-on parts. This is represented by the IfcRelAggregates decomposition mechanism used to aggregate parts, such as IfcPlate, into a container element such as IfcElementAssembly or IfcCurtainWall.
NOTE  The representation of a plate in a structural analysis model is provided by IfcStructuralSurfaceMember being part of an IfcStructuralAnalysisModel.

An instance IfcPlate should preferably get its geometric representation and material assignment through the type definition by IfcPlateType assigned using the IfcRelDefinesByType relationship. This allows identical plates in a construction to be represented by the same instance of IfcPlateType.

A plate may have openings, such as voids or recesses. They are defined by an IfcOpeningElement attached to the plate using the inverse relationship HasOpenings pointing to IfcRelVoidsElement. The position number of a plate as often used in steel construction is assigned through the attribute IfcElement.Tag

The IFC specification provides two entities for plate occurrences:

HISTORY  New entity in IFC2x2
Attribute definitions
#AttributeTypeCardinalityDescription C
9PredefinedTypeIfcPlateTypeEnum[0:1] Predefined generic type for a plate that is specified in an enumeration. There may be a property set given specificly for the predefined types.
NOTE  The PredefinedType shall only be used, if no IfcPlateType is assigned, providing its own IfcPlateType.PredefinedType.
X
Formal Propositions
RuleDescription
CorrectPredefinedTypeEither the PredefinedType attribute is unset (e.g. because an IfcPlateType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssignedEither there is no plate type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcPlateType.
Inherited definitions from supertypes
Entity inheritance IfcPlateStandardCase IfcBuildingElement IfcElement IfcProduct IfcObject IfcObjectDefinition IfcRoot
Attribute inheritance
#AttributeTypeCardinalityDescriptionC
IfcRoot
1GlobalIdIfcGloballyUniqueId[1:1] Assignment of a globally unique identifier within the entire software world. X
2OwnerHistoryIfcOwnerHistory[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
3NameIfcLabel[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
4DescriptionIfcText[0:1] 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). 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). 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. 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). 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). 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[0:1] 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. 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. 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. 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. X
IfcProduct
6ObjectPlacementIfcObjectPlacement[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
7RepresentationIfcProductRepresentation[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
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
IfcElement
8TagIfcIdentifier[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
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.
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.
X
HasProjectionsIfcRelProjectsElement
@RelatingElement
S[0:?]Projection relationship that adds a feature (using a Boolean union) to the IfcBuildingElement.X
ReferencedInStructuresIfcRelReferencedInSpatialStructure
@RelatedElements
S[0:?]Reference relationship to the spatial structure element, to which the element is additionally associated. This relationship may not be hierarchical, an element may be referenced by zero, one or many spatial structure elements. 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
IfcBuildingElement
IfcPlate
9PredefinedTypeIfcPlateTypeEnum[0:1] Predefined generic type for a plate that is specified in an enumeration. There may be a property set given specificly for the predefined types.
NOTE  The PredefinedType shall only be used, if no IfcPlateType is assigned, providing its own IfcPlateType.PredefinedType.
X
Definitions applying to Common Use Definitions

 Instance diagram


Concept usage

Object Typing

The Object Typing concept applies to this entity as shown in Table 134.

Type
IfcPlateType

Table 134 — IfcPlate Object Typing



Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 135.

PredefinedTypeNameProperties
 Pset_PlateCommonSingle Value
NameValue
ReferenceIfcIdentifier
IsExternalIfcBoolean
LoadBearingIfcBoolean
AcousticRatingIfcLabel
FireRatingIfcLabel
ThermalTransmittanceIfcThermalTransmittanceMeasure
Enumerated Value
NameValueValue
StatusIfcLabelIfcLabel
 Pset_ConcreteElementGeneralSingle Value
NameValue
ConstructionMethodIfcLabel
StructuralClassIfcLabel
StrengthClassIfcLabel
ExposureClassIfcLabel
ReinforcementVolumeRatioIfcMassDensityMeasure
ReinforcementAreaRatioIfcAreaDensityMeasure
DimensionalAccuracyClassIfcLabel
ConstructionToleranceClassIfcLabel
ConcreteCoverIfcPositiveLengthMeasure
ConcreteCoverAtMainBarsIfcPositiveLengthMeasure
ConcreteCoverAtLinksIfcPositiveLengthMeasure
ReinforcementStrengthClassIfcLabel
 Pset_PrecastConcreteElementFabricationSingle Value
NameValue
TypeDesignatorIfcLabel
ProductionLotIdIfcIdentifier
SerialNumberIfcIdentifier
PieceMarkIfcLabel
AsBuiltLocationNumberIfcLabel
ActualProductionDateIfcDateTime
ActualErectionDateIfcDateTime
 Pset_PrecastConcreteElementGeneralSingle Value
NameValue
TypeDesignatorIfcLabel
CornerChamferIfcPositiveLengthMeasure
ManufacturingToleranceClassIfcLabel
FormStrippingStrengthIfcPressureMeasure
LiftingStrengthIfcPressureMeasure
ReleaseStrengthIfcPressureMeasure
MinimumAllowableSupportLengthIfcPositiveLengthMeasure
InitialTensionIfcPressureMeasure
TendonRelaxationIfcPositiveRatioMeasure
TransportationStrengthIfcPressureMeasure
SupportDuringTransportDescriptionIfcText
HollowCorePluggingIfcLabel
CamberAtMidspanIfcRatioMeasure
BatterAtStartIfcPlaneAngleMeasure
BatterAtEndIfcPlaneAngleMeasure
TwistingIfcPlaneAngleMeasure
ShorteningIfcRatioMeasure
PieceMarkIfcLabel
DesignLocationNumberIfcLabel
 Pset_EnvironmentalImpactIndicatorsSingle Value
NameValue
ReferenceIfcIdentifier
FunctionalUnitReferenceIfcLabel
UnitIfcText
ExpectedServiceLifeIfcTimeMeasure
TotalPrimaryEnergyConsumptionPerUnitIfcEnergyMeasure
WaterConsumptionPerUnitIfcVolumeMeasure
HazardousWastePerUnitIfcMassMeasure
NonHazardousWastePerUnitIfcMassMeasure
ClimateChangePerUnitIfcMassMeasure
AtmosphericAcidificationPerUnitIfcMassMeasure
RenewableEnergyConsumptionPerUnitIfcEnergyMeasure
NonRenewableEnergyConsumptionPerUnitIfcEnergyMeasure
ResourceDepletionPerUnitIfcMassMeasure
InertWastePerUnitIfcMassMeasure
RadioactiveWastePerUnitIfcMassMeasure
StratosphericOzoneLayerDestructionPerUnitIfcMassMeasure
PhotochemicalOzoneFormationPerUnitIfcMassMeasure
EutrophicationPerUnitIfcMassMeasure
Enumerated Value
NameValueValue
LifeCyclePhaseIfcLabelIfcLabel
 Pset_EnvironmentalImpactValuesSingle Value
NameValue
TotalPrimaryEnergyConsumptionIfcEnergyMeasure
WaterConsumptionIfcVolumeMeasure
HazardousWasteIfcMassMeasure
NonHazardousWasteIfcMassMeasure
ClimateChangeIfcMassMeasure
AtmosphericAcidificationIfcMassMeasure
RenewableEnergyConsumptionIfcEnergyMeasure
NonRenewableEnergyConsumptionIfcEnergyMeasure
ResourceDepletionIfcMassMeasure
InertWasteIfcMassMeasure
RadioactiveWasteIfcMassMeasure
StratosphericOzoneLayerDestructionIfcMassMeasure
PhotochemicalOzoneFormationIfcMassMeasure
EutrophicationIfcMassMeasure
LeadInTimeIfcDuration
DurationIfcDuration
LeadOutTime 
 Pset_ConditionSingle Value
NameValue
AssessmentDateIfcDate
AssessmentConditionIfcLabel
AssessmentDescriptionIfcText
 Pset_ManufacturerOccurrenceSingle Value
NameValue
AcquisitionDateIfcDate
BarCodeIfcIdentifier
SerialNumberIfcIdentifier
BatchReferenceIfcIdentifier
Enumerated Value
NameValueValue
AssemblyPlaceIfcLabelIfcLabel
 Pset_ManufacturerTypeInformationSingle Value
NameValue
GlobalTradeItemNumberIfcIdentifier
ArticleNumberIfcIdentifier
ModelReferenceIfcLabel
ModelLabelIfcLabel
ManufacturerIfcLabel
ProductionYearIfcLabel
Enumerated Value
NameValueValue
AssemblyPlaceIfcLabelIfcLabel
 Pset_ServiceLifeSingle Value
NameValue
MeanTimeBetweenFailureIfcDuration
Bounded Value
NameValueValue
ServiceLifeDurationIfcDurationIfcDuration
 Pset_WarrantySingle Value
NameValue
WarrantyIdentifierIfcIdentifier
WarrantyStartDateIfcDate
WarrantyEndDateIfcDate
IsExtendedWarrantyIfcBoolean
WarrantyPeriodIfcTimeMeasure
WarrantyContentIfcText
ExclusionsIfcText

Table 135 — IfcPlate Property Sets for Objects



Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 136.

Name
Qto_PlateBaseQuantities

Table 136 — IfcPlate Quantity Sets



Material Layer Set

The Material Layer Set concept applies to this entity.

The material of the IfcPlate is defined by IfcMaterialLayerSet, or by IfcMaterial, and it is attached either directly or at the IfcPlateType.

NOTE  It is illegal to assign an IfcMaterialLayerSetUsage to an IfcPlate. Only the subtype IfcPlateStandardCase supports this concept.


Spatial Containment

The Spatial Containment concept applies to this entity as shown in Table 137.

StructureDescription
IfcBuildingStoreyDefault spatial container
IfcBuildingSpatial container for the element if it cannot be assigned to a building storey
IfcSiteSpatial container for the element in case that it is placed on site (outside of building)

Table 137 — IfcPlate Spatial Containment

The IfcPlate, as any subtype of IfcBuildingElement, may participate alternatively in one of the two different containment relationships:

  • the Spatial Containment (defined here), or
  • the Element Composition.


Surface 3D Geometry

The Surface 3D Geometry concept applies to this entity.

NOTE  The 'Surface' can be used to define a surfacic model of the building (e.g. for analytical purposes, or for reduced Level of Detail representation).


Body SweptSolid Geometry

The Body SweptSolid Geometry concept applies to this entity.

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

  • Solid: IfcExtrudedAreaSolid is required,
  • Profile: IfcArbitraryClosedProfileDef, IfcArbitraryProfileDefWithVoids, IfcRectangleProfileDef, IfcCircleProfileDef, IfcEllipseProfileDef shall be supported.
  • Extrusion: The profile can be extruded perpendicularly or non-perpendicularly to the plane of the swept profile.



Body Clipping Geometry

The Body Clipping Geometry concept applies to this entity.



Product Assignment

The Product Assignment concept applies to this entity as shown in Table 138.

TypeDescription
IfcStructuralSurfaceMemberAn idealized structural member corresponding to the plate.
IfcTaskA task for operating on the plate.

Table 138 — IfcPlate Product Assignment



Concept inheritance

#ConceptModel View
IfcRoot
Software IdentityCommon Use Definitions
Revision ControlCommon Use Definitions
IfcObject
Object Occurrence Predefined TypeCommon Use Definitions
IfcElement
Product Local PlacementCommon Use Definitions
Box GeometryCommon Use Definitions
FootPrint GeometryCommon Use Definitions
Body SurfaceOrSolidModel GeometryCommon Use Definitions
Body SurfaceModel GeometryCommon Use Definitions
Body Tessellation GeometryCommon Use Definitions
Body Brep GeometryCommon Use Definitions
Body AdvancedBrep GeometryCommon Use Definitions
Body CSG GeometryCommon Use Definitions
Mapped GeometryCommon Use Definitions
Mesh GeometryCommon Use Definitions
IfcBuildingElement
IfcPlate
Object TypingCommon Use Definitions
Property Sets for ObjectsCommon Use Definitions
Quantity SetsCommon Use Definitions
Material Layer SetCommon Use Definitions
Spatial ContainmentCommon Use Definitions
Surface 3D GeometryCommon Use Definitions
Body SweptSolid GeometryCommon Use Definitions
Body Clipping GeometryCommon Use Definitions
Product AssignmentCommon Use Definitions
Formal representations
XSD Specification
 <xs:element name="IfcPlate" type="ifc:IfcPlate" substitutionGroup="ifc:IfcBuildingElement" nillable="true"/>
 <xs:complexType name="IfcPlate">
  <xs:complexContent>
   <xs:extension base="ifc:IfcBuildingElement">
    <xs:attribute name="PredefinedType" type="ifc:IfcPlateTypeEnum" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcPlate
 SUPERTYPE OF(IfcPlateStandardCase)
 SUBTYPE OF (IfcBuildingElement);
  PredefinedType : OPTIONAL IfcPlateTypeEnum;
 WHERE
  CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcPlateTypeEnum.USERDEFINED) OR ((PredefinedType = IfcPlateTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
  CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCSHAREDBLDGELEMENTS.IFCPLATETYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

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