Tronçon de gaine

A duct segment is used to typically join two sections of duct network.

HISTORY  New entity in IFC4

Common Use Definitions

The following concepts are inherited at supertypes:

 Instance diagram

Object Typing

The Object Typing concept applies to this entity as shown in Table 498.

Table 498 — IfcDuctSegment Object Typing

Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 499.

Table 499 — IfcDuctSegment Property Sets for Objects

Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 500.

Table 500 — IfcDuctSegment Quantity Sets

Material Profile Set Usage

The Material Profile Set Usage concept applies to this entity as shown in Table 501.
CasingMaterial from which the duct fitting is constructed.
CoatingThe outer coating, if applicable.
InsulationThe insulating wrapping, if applicable.
LiningThe inner lining, if applicable.

Table 501 — IfcDuctSegment Material Profile Set Usage

Port Nesting

The Port Nesting concept applies to this entity as shown in Table 502.
 InletSINKNOTDEFINEDThe flow inlet.
 OutletSOURCENOTDEFINEDThe flow outlet.

Table 502 — IfcDuctSegment Port Nesting

XSD Specification:

 <xs:element name="IfcDuctSegment" type="ifc:IfcDuctSegment" substitutionGroup="ifc:IfcFlowSegment" nillable="true"/>
 <xs:complexType name="IfcDuctSegment">
   <xs:extension base="ifc:IfcFlowSegment">
    <xs:attribute name="PredefinedType" type="ifc:IfcDuctSegmentTypeEnum" use="optional"/>

EXPRESS Specification:

ENTITY IfcDuctSegment
SUBTYPE OF IfcFlowSegment;
PredefinedType : OPTIONAL IfcDuctSegmentTypeEnum;
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcDuctSegmentTypeEnum.USERDEFINED) OR ((PredefinedType = IfcDuctSegmentTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCHVACDOMAIN.IFCDUCTSEGMENTTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));

Link to EXPRESS-G diagram EXPRESS-G diagram

Formal Propositions:

CorrectPredefinedType : Either the PredefinedType attribute is unset (e.g. because an IfcDuctSegmentType is associated), or the inherited attribute ObjectType shall be provided, if the PredefinedType is set to USERDEFINED.
CorrectTypeAssigned : Either there is no duct segment type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcDuctSegmentType.

Inheritance Graph:

ENTITY IfcDuctSegment
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
HasAssignments : SET OF IfcRelAssigns FOR RelatedObjects;
Nests : SET [0:1] OF IfcRelNests FOR RelatedObjects;
IsNestedBy : SET OF IfcRelNests FOR RelatingObject;
HasContext : SET [0:1] OF IfcRelDeclares FOR RelatedDefinitions;
IsDecomposedBy : SET OF IfcRelAggregates FOR RelatingObject;
Decomposes : SET [0:1] OF IfcRelAggregates FOR RelatedObjects;
HasAssociations : SET OF IfcRelAssociates FOR RelatedObjects;
ENTITY IfcObject
ObjectType : OPTIONAL IfcLabel;
IsDeclaredBy : SET [0:1] OF IfcRelDefinesByObject FOR RelatedObjects;
Declares : SET OF IfcRelDefinesByObject FOR RelatingObject;
IsTypedBy : SET [0:1] OF IfcRelDefinesByType FOR RelatedObjects;
IsDefinedBy : SET OF IfcRelDefinesByProperties FOR RelatedObjects;
ENTITY IfcProduct
ObjectPlacement : OPTIONAL IfcObjectPlacement;
Representation : OPTIONAL IfcProductRepresentation;
ReferencedBy : SET OF IfcRelAssignsToProduct FOR RelatingProduct;
ENTITY IfcElement
Tag : OPTIONAL IfcIdentifier;
FillsVoids : SET [0:1] OF IfcRelFillsElement FOR RelatedBuildingElement;
ConnectedTo : SET OF IfcRelConnectsElements FOR RelatingElement;
IsInterferedByElements : SET OF IfcRelInterferesElements FOR RelatedElement;
InterferesElements : SET OF IfcRelInterferesElements FOR RelatingElement;
HasProjections : SET OF IfcRelProjectsElement FOR RelatingElement;
ReferencedInStructures : SET OF IfcRelReferencedInSpatialStructure FOR RelatedElements;
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 IfcDistributionElement
HasPorts : SET OF IfcRelConnectsPortToElement FOR RelatedElement;
ENTITY IfcDistributionFlowElement
HasControlElements : SET [0:1] OF IfcRelFlowControlElements FOR RelatingFlowElement;
ENTITY IfcFlowSegment
ENTITY IfcDuctSegment
PredefinedType : OPTIONAL IfcDuctSegmentTypeEnum;

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