7.5.3.25 IfcDuctFitting

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A duct fitting is a junction or transition in a ducted flow distribution system or used to connect duct segments, resulting in changes in flow characteristics to the fluid such as direction and flow rate.

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 493.
Type
IfcDuctFittingType
IfcDistributionFlowElementType
IfcDistributionElementType

Table 493 — IfcDuctFitting Object Typing



Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 494.
PredefinedTypeName
 Pset_DuctFittingOccurrence
 Pset_DuctFittingPHistory
 Pset_DuctFittingTypeCommon
 Pset_SoundGeneration
 Pset_ElectricalDeviceCommon
 Pset_Condition
 Pset_EnvironmentalImpactIndicators
 Pset_EnvironmentalImpactValues
 Pset_ManufacturerOccurrence
 Pset_ManufacturerTypeInformation
 Pset_PackingInstructions
 Pset_ServiceLife
 Pset_Warranty

Table 494 — IfcDuctFitting Property Sets for Objects



Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 495.
Name
Qto_DuctFittingBaseQuantities

Table 495 — IfcDuctFitting Quantity Sets



Material Layer Set Usage

The Material Layer Set Usage concept applies to this entity as shown in Table 496.
NameDescription
CasingMaterial from which the duct fitting is constructed.
CoatingThe outer coating, if applicable.
InsulationThe insulating wrapping, if applicable.
LiningThe inner lining, if applicable.

Table 496 — IfcDuctFitting Material Layer Set Usage



Port Nesting

The Port Nesting concept applies to this entity as shown in Table 497.
PredefinedTypeNameFlowTypeDescription
BENDInletSINKNOTDEFINEDThe flow inlet.
BENDOutletSOURCENOTDEFINEDThe flow outlet.
CONNECTORInletSINKNOTDEFINEDThe flow inlet.
CONNECTOROutletSOURCENOTDEFINEDThe flow outlet.
ENTRYOutletSOURCENOTDEFINEDThe flow outlet.
EXITInletSINKNOTDEFINEDThe flow inlet.
JUNCTIONInletSINKNOTDEFINEDThe flow inlet.
JUNCTIONOutlet#1SOURCENOTDEFINEDThe left flow outlet.
JUNCTIONOutlet#2SOURCENOTDEFINEDThe right flow outlet.
OBSTRUCTIONInletSINKNOTDEFINEDThe flow inlet.
OBSTRUCTIONOutletSOURCENOTDEFINEDThe flow outlet.

Table 497 — IfcDuctFitting Port Nesting




XSD Specification:

 <xs:element name="IfcDuctFitting" type="ifc:IfcDuctFitting" substitutionGroup="ifc:IfcFlowFitting" nillable="true"/>
 <xs:complexType name="IfcDuctFitting">
  <xs:complexContent>
   <xs:extension base="ifc:IfcFlowFitting">
    <xs:attribute name="PredefinedType" type="ifc:IfcDuctFittingTypeEnum" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcDuctFitting
SUBTYPE OF IfcFlowFitting;
PredefinedType : OPTIONAL IfcDuctFittingTypeEnum;
WHERE
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcDuctFittingTypeEnum.USERDEFINED) OR ((PredefinedType = IfcDuctFittingTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCHVACDOMAIN.IFCDUCTFITTINGTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

Formal Propositions:

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

Inheritance Graph:

ENTITY IfcDuctFitting
ENTITY IfcRoot
GlobalId : IfcGloballyUniqueId;
OwnerHistory : OPTIONAL IfcOwnerHistory;
Name : OPTIONAL IfcLabel;
Description : OPTIONAL IfcText;
ENTITY IfcObjectDefinition
INVERSE
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;
INVERSE
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;
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;
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
INVERSE
HasPorts : SET OF IfcRelConnectsPortToElement FOR RelatedElement;
ENTITY IfcDistributionFlowElement
INVERSE
HasControlElements : SET [0:1] OF IfcRelFlowControlElements FOR RelatingFlowElement;
ENTITY IfcFlowFitting
ENTITY IfcDuctFitting
PredefinedType : OPTIONAL IfcDuctFittingTypeEnum;
END_ENTITY;

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