 | Mechanisches Befestigungsmittel - Typ |
 | Mechanical Fastener Type |
| Item | SPF | XML | Change | Description | 4.0.0.0 |
|---|---|---|---|---|
| IfcMechanicalFastenerType | ||||
| OwnerHistory | MODIFIED | Instantiation changed to OPTIONAL. | ||
| ApplicableOccurrence | MODIFIED | Type changed from IfcLabel to IfcIdentifier. | ||
| PredefinedType | ADDED | |||
| NominalDiameter | ADDED | |||
| NominalLength | ADDED | 4.0.2.1 | ||
| IfcMechanicalFastenerType | ||||
| NominalDiameter | MODIFIED | Status changed to Deprecated. | ||
| NominalLength | MODIFIED | Status changed to Deprecated. |
The element component type IfcMechanicalFastenerType defines commonly shared information for occurrences of mechanical fasteners. The set of shared information may include:
It is used to define a mechanical fastener type specification indicating the specific product information that is common to all occurrences of that product type. The IfcMechanicalFastenerType may be declared within IfcProject or IfcProjectLibrary using IfcRelDeclares and may be exchanged with or without occurrences of the type. Occurrences of IfcMechanicalFastenerType are represented by instances of IfcMechanicalFastener.
HISTORY New entity in IFC2x2
IFC4 CHANGE Supertype changed from IfcFastenerType to IfcElementComponentType. Attributes PredefinedType, NominalDiameter, NominalLength added.
Classification Use Definition
Mechanical fasteners, especially bolts, are often standardized. To refer to a formal fastener designation according to a standard (a product norm), IfcRelAssociatesClassification together with IfcClassificationReference should be used.
Furthermore, IfcRelAssociatesLibrary together with IfcLibraryReference may be used to refer to a library which contains fastener definitions.
| # | Attribute | Type | Cardinality | Description | R |
|---|---|---|---|---|---|
| 10 | PredefinedType | IfcMechanicalFastenerTypeEnum | Subtype of mechanical fastener | X | |
| 11 | NominalDiameter | - | This attribute is out of scope for this model view definition and shall not be set. | ||
| 12 | NominalLength | - | This attribute is out of scope for this model view definition and shall not be set. |
| Rule | Description |
|---|---|
| CorrectPredefinedType | The inherited attribute ElementType shall be provided if the PredefinedType is set to USERDEFINED. |
| # | Attribute | Type | Cardinality | Description | R |
|---|---|---|---|---|---|
| IfcRoot | |||||
| 1 | GlobalId | IfcGloballyUniqueId | Assignment of a globally unique identifier within the entire software world. | X | |
| 2 | OwnerHistory | IfcOwnerHistory | ? |
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. IFC4 CHANGE The attribute has been changed to be OPTIONAL. | X |
| 3 | Name | IfcLabel | ? | 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 | ? | 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).
IFC4 CHANGE The inverse attribute datatype has been added and separated from Decomposes defined at IfcObjectDefinition. | ||
| 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).
IFC4 CHANGE The inverse attribute datatype has been added and separated from IsDecomposedBy defined at IfcObjectDefinition. | 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.
IFC4 CHANGE The inverse attribute datatype has been added. | ||
| 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).
IFC4 CHANGE The inverse attribute datatype has been changed from the supertype IfcRelDecomposes to subtype IfcRelAggregates. | 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).
IFC4 CHANGE The inverse attribute datatype has been changed from the supertype IfcRelDecomposes to subtype IfcRelAggregates. | 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 | |
| IfcTypeObject | |||||
| 5 | ApplicableOccurrence | IfcIdentifier | ? |
The attribute optionally defines the data type of the occurrence object, to which the assigned type object can relate. If not present, no instruction is given to which occurrence object the type object is applicable. The following conventions are used:
EXAMPLE Refering to a furniture as applicable occurrence entity would be expressed as 'IfcFurnishingElement', refering to a brace as applicable entity would be expressed as 'IfcMember/BRACE', refering to a wall and wall standard case would be expressed as 'IfcWall, IfcWallStandardCase'. | X |
| 6 | HasPropertySets | IfcPropertySetDefinition | ? S[1:?] |
Set IFC2x3 CHANGE The attribute aggregate type has been changed from LIST to SET. | X |
| Types | IfcRelDefinesByType @RelatingType | S[0:1] | Reference to the relationship IfcRelDefinedByType and thus to those occurrence objects, which are defined by this type. | ||
| IfcTypeProduct | |||||
| 7 | RepresentationMaps | IfcRepresentationMap | ? L[1:?] | List of unique representation maps. Each representation map describes a block definition of the shape of the product style. By providing more than one representation map, a multi-view block definition can be given. | X |
| 8 | Tag | IfcLabel | ? | The tag (or label) identifier at the particular type of a product, e.g. the article number (like the EAN). It is the identifier at the specific level. | X |
| IfcElementType | |||||
| 9 | ElementType | IfcLabel | ? | 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 |
| IfcElementComponentType | |||||
| IfcMechanicalFastenerType | |||||
| 10 | PredefinedType | IfcMechanicalFastenerTypeEnum | Subtype of mechanical fastener | X | |
| 11 | NominalDiameter | - | This attribute is out of scope for this model view definition and shall not be set. | ||
| 12 | NominalLength | - | This attribute is out of scope for this model view definition and shall not be set. | ||
| # | Concept | Template | Model View |
|---|---|---|---|
| IfcRoot | |||
| Identity | Software Identity | Reference View | |
| Revision Control | Revision Control | Reference View | |
| IfcObjectDefinition | |||
| Classification | Classification | Reference View | |
<xs:element name="IfcMechanicalFastenerType" type="ifc:IfcMechanicalFastenerType" substitutionGroup="ifc:IfcElementComponentType" nillable="true"/>
<xs:complexType name="IfcMechanicalFastenerType">
<xs:complexContent>
<xs:extension base="ifc:IfcElementComponentType">
<xs:attribute name="PredefinedType" type="ifc:IfcMechanicalFastenerTypeEnum" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
ENTITY IfcMechanicalFastenerType
SUBTYPE OF (IfcElementComponentType);
PredefinedType : IfcMechanicalFastenerTypeEnum;
NominalDiameter : OPTIONAL IfcStrippedOptional;
NominalLength : OPTIONAL IfcStrippedOptional;
WHERE
CorrectPredefinedType : (PredefinedType <> IfcMechanicalFastenerTypeEnum.USERDEFINED) OR
((PredefinedType = IfcMechanicalFastenerTypeEnum.USERDEFINED) AND EXISTS(SELF\IfcElementType.ElementType));
END_ENTITY;
EXPRESS-G diagram
Link to this page