Natural language names
 | Platte / Scheibe mit veränderlicher Dicke |
 | Structural Surface Member Varying |
| Platte / Scheibe mit veränderlicher Dicke |
| Structural Surface Member Varying |
| Item | SPF | XML | Change | Description | IFC2x3 to IFC4 |
|---|---|---|---|---|
| IfcStructuralSurfaceMemberVarying | ||||
| OwnerHistory | MODIFIED | Instantiation changed to OPTIONAL. | ||
| PredefinedType | MODIFIED | Type changed from IfcStructuralSurfaceTypeEnum to IfcStructuralSurfaceMemberTypeEnum. | ||
| SubsequentThickness | X | DELETED | ||
| VaryingThicknessLocation | X | DELETED |
This entity describes surface members with varying section properties. The properties are provided by means of Pset_StructuralSurfaceMemberVaryingThickness via IfcRelDefinesByProperties, or by means of aggregation: An instance of IfcStructuralSurfaceMemberVarying may be composed of two or more instances of IfcStructuralSurfaceMember with differing section properties. These subordinate members relate to the instance of IfcStructuralSurfaceMemberVarying by IfcRelAggregates.
NOTE It is recommended that structural activities (actions or reactions) are not connected with aggregated IfcStructuralSurfaceMemberVarying but only with the IfcStructuralSurfaceMembers in the aggregation. That way, difficulties in interpretation of local coordinates are avoided.
HISTORY New entity in IFC2x2.
IFC4 CHANGE Use definition changed and attributes deleted.
Coordinate Systems:
See definitions at IfcStructuralItem and IfcStructuralSurfaceMember. The local coordinates of an aggregate are generally undefined since continuity of local coordinates of the parts is not ensured.
Material Use Definition
In case of aggregation, only the individual parts (direct instances of IfcStructuralSurfaceMember) carry material and thickness information. Otherwise, definitions at IfcStructuralSurfaceMember apply.
| # | 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 | |
| IfcStructuralItem | |||||
| AssignedStructuralActivity | IfcRelConnectsStructuralActivity @RelatingElement | S[0:?] | Inverse relationship to all structural activities (i.e. to actions or reactions) which are assigned to this structural member. | X | |
| IfcStructuralMember | |||||
| ConnectedBy | IfcRelConnectsStructuralMember @RelatingStructuralMember | S[0:?] | Inverse relationship to all structural connections (i.e. to supports or connecting elements) which are defined for this structural member. | X | |
| IfcStructuralSurfaceMember | |||||
| 8 | PredefinedType | IfcStructuralSurfaceMemberTypeEnum | [1:1] | Type of member with respect to its load carrying behavior in this analysis idealization. | X |
| 9 | Thickness | - | This attribute is out of scope for this model view definition and shall not be set. | ||
| IfcStructuralSurfaceMemberVarying | |||||
| # | Concept | Model View |
|---|---|---|
| IfcRoot | ||
| Software Identity | Bridge View | |
| User Identity | Bridge View | |
| Object Ownership | Bridge View | |
| IfcObject | ||
| Property Sets for Objects | Bridge View | |
| IfcStructuralSurfaceMember | ||
| Material Layer Set Usage | Bridge View | |
| Reference Topology | Bridge View | |
| Structural Connectivity | Bridge View | |
<xs:element name="IfcStructuralSurfaceMemberVarying" type="ifc:IfcStructuralSurfaceMemberVarying" substitutionGroup="ifc:IfcStructuralSurfaceMember" nillable="true"/>
<xs:complexType name="IfcStructuralSurfaceMemberVarying">
<xs:complexContent>
<xs:extension base="ifc:IfcStructuralSurfaceMember"/>
</xs:complexContent>
</xs:complexType>
ENTITY IfcStructuralSurfaceMemberVarying
SUBTYPE OF (IfcStructuralSurfaceMember);
END_ENTITY;
EXPRESS-G diagram
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