IfcMechanicalFastener

Definition from IAI: Fasteners connecting building elements mechanically.

HISTORY New entity in IFC Release 2x2

General usage

The exact type information of the IfcMechanicalFastener is given in the ObjectType attribute inherited from IfcObject. Standard type designations are provided for guideline below.

Standard mechanical fastener type designation	Description
'Bolt'	A threaded cylindrical rod that engages with a similarly threaded hole in a nut or any other part to form a fastener.
'Nut'	A small square or hexagonal metal block with internal screw thread to be fitted onto a bolt.
'Washer'	A disk, as of metal, plastic, rubber, or other material, placed beneath a nut or at an axle bearing or a joint to relieve friction, prevent leakage, or distribute pressure.
'Screw'	A fastener with a tapered threaded shank and a slotted head.
'Nail'	A thin pointed piece of metal that is hammered into materials as a fastener.
'Rivet'	A fastening part having a head at one end and the other end being hammered flat after being passed through holes in the pieces that are fastened together.

Geometry Use Definitions:

The geometric representation of IfcMechanicalFastener is given by the IfcProductDefinitionShape, allowing multiple geometric representations. Included are:

Local Placement
The use of local placement is defined in the supertype IfcElementComponent.

Standard Geometric Representation
The use of Standard Geometric Representations is defined in the supertype IfcElementComponent.

EXPRESS specification:

ENTITY IfcMechanicalFastener

SUBTYPE OF (

IfcFastener);

NominalDiameter

OPTIONAL IfcPositiveLengthMeasure;

NominalLength

OPTIONAL IfcPositiveLengthMeasure;

END_ENTITY;

Attribute definitions:

NominalDiameter	:	The nominal diameter describing the cross-section size of the fastener.
NominalLength	:	The nominal length describing the longitudinal dimensions of the fastener.

Inheritance graph

ENTITY IfcMechanicalFastener;

ENTITY IfcRoot;

GlobalId

IfcGloballyUniqueId;

OwnerHistory

IfcOwnerHistory;

Name

OPTIONAL IfcLabel;

Description

OPTIONAL IfcText;

ENTITY IfcObjectDefinition;

INVERSE

HasAssignments

SET OF IfcRelAssigns FOR RelatedObjects;

IsDecomposedBy

SET OF IfcRelDecomposes FOR RelatingObject;

Decomposes

SET [0:1] OF IfcRelDecomposes FOR RelatedObjects;

HasAssociations

SET OF IfcRelAssociates FOR RelatedObjects;

ENTITY IfcObject;

ObjectType

OPTIONAL IfcLabel;

INVERSE

IsDefinedBy

SET OF IfcRelDefines FOR RelatedObjects;

ENTITY IfcProduct;

ObjectPlacement

OPTIONAL IfcObjectPlacement;

Representation

OPTIONAL IfcProductRepresentation;

INVERSE

ReferencedBy

SET OF IfcRelAssignsToProduct FOR RelatingProduct;

ENTITY IfcElement;

Tag

OPTIONAL IfcIdentifier;

INVERSE

FillsVoids

SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement;

ConnectedTo

SET OF IfcRelConnectsElements FOR RelatingElement;

HasCoverings

SET OF IfcRelCoversBldgElements FOR RelatingBuildingElement;

HasProjections

SET OF IfcRelProjectsElement FOR RelatingElement;

HasStructuralMember

SET OF IfcRelConnectsStructuralElement FOR RelatingElement;

ReferencedInStructures

SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;

HasPorts

SET OF IfcRelConnectsPortToElement FOR RelatedElement;

HasOpenings

SET OF IfcRelVoidsElement FOR RelatingBuildingElement;

IsConnectionRealization

SET OF IfcRelConnectsWithRealizingElements FOR RealizingElements;

ProvidesBoundaries

SET OF IfcRelSpaceBoundary FOR RelatedBuildingElement;

ConnectedFrom

SET OF IfcRelConnectsElements FOR RelatedElement;

ContainedInStructure

SET [0:1] OF IfcRelContainedInSpatialStructure FOR RelatedElements;

ENTITY IfcElementComponent;

ENTITY IfcFastener;

ENTITY IfcMechanicalFastener;

NominalDiameter

OPTIONAL IfcPositiveLengthMeasure;

NominalLength

OPTIONAL IfcPositiveLengthMeasure;

END_ENTITY;