![]() | Platte / Paneel |
![]() | Plate |
![]() | Plaque |
Item | SPF | XML | Change | Description | IFC2x3 to IFC4 |
---|---|---|---|---|
IfcPlate | ||||
OwnerHistory | MODIFIED | Instantiation changed to OPTIONAL. | ||
PredefinedType | ADDED | IFC4x1 to IFC4x2 | ||
IfcPlate | ||||
PositionedFrom | ADDED |
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 | Type | Cardinality | Description | B |
---|---|---|---|---|---|
9 | PredefinedType | IfcPlateTypeEnum | [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 |
Rule | Description |
---|---|
CorrectPredefinedType | Either 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. |
CorrectTypeAssigned | Either 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. |
# | 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 | |||||
IfcPlate | |||||
9 | PredefinedType | IfcPlateTypeEnum | [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 |
Plates are used to represent planar surfaces with primary function of resisting bending such as stiffeners or gusset plates. The general definition IfcPlate defines a fixed shape, while the subtype IfcPlateStandardCase allows for parametric resizing.
Object Typing
The Object Typing concept applies to this entity as shown in Table 39.
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Table 39 — IfcPlate Object Typing |
Exchange | ![]() |
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Import | O | |||
Export | O |
Quantity Sets
The Quantity Sets concept applies to this entity as shown in Table 40.
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Table 40 — IfcPlate Quantity Sets |
Exchange | ![]() |
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Import | O | |||
Export | O |
Surface Connectivity
The Surface Connectivity concept applies to this entity as shown in Table 41.
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Table 41 — IfcPlate Surface Connectivity |
This relationship is used to indicate connections between plates and other elements such as beams (girders). The intersecting surface may be provided to indicate precisely where the member is attached, and to assist fabrication for indicating contour marking and/or weld locations.
Exchange | ![]() |
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Import | R | R | ||
Export | R | R |
Body SweptSolid Extruded Arbitrary Geometry
The Body SweptSolid Extruded Arbitrary Geometry concept applies to this entity.
Exchange | ![]() |
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Import | O | O | ||
Export | O | O |
Annotation 2D Geometry
The Annotation 2D Geometry concept applies to this entity as shown in Table 42.
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Table 42 — IfcPlate Annotation 2D Geometry |
Piece marks, pop marks, and contour marks may be designated using the 'Annotation' representation.
Exchange | ![]() |
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Import | O | |||
Export | O |
Product Assignment
The Product Assignment concept applies to this entity as shown in Table 43.
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Table 43 — IfcPlate Product Assignment |
Exchange | ![]() |
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Import | O | |||
Export | O |
Element Nesting
The Element Nesting concept applies to this entity as shown in Table 44.
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Table 44 — IfcPlate Element Nesting |
The nesting relationship may be used to indicate nesting of plates onto sheets of material.
Exchange | ![]() |
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Import | R | |||
Export | R |
# | 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 | |
IfcPlate | ||
Object Typing | Bridge View | |
Quantity Sets | Bridge View | |
Surface Connectivity | Bridge View | |
Body SweptSolid Extruded Arbitrary Geometry | Bridge View | |
Annotation 2D Geometry | Bridge View | |
Product Assignment | Bridge View | |
Element Nesting | Bridge View |
<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>
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;