7.6.3.7 IfcStackTerminal

Rohrabdeckung

A stack terminal is placed at the top of a ventilating stack (such as to prevent ingress by birds or rainwater) or rainwater pipe (to act as a collector or hopper for discharge from guttering).

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 614.
Type
IfcStackTerminalType
IfcDistributionFlowElementType
IfcDistributionElementType

Table 614 — IfcStackTerminal Object Typing



Property Sets for Objects

The Property Sets for Objects concept applies to this entity as shown in Table 615.
PredefinedTypeName
 Pset_StackTerminalTypeCommon
 Pset_SoundGeneration
 Pset_ElectricalDeviceCommon
 Pset_Condition
 Pset_EnvironmentalImpactIndicators
 Pset_EnvironmentalImpactValues
 Pset_ManufacturerOccurrence
 Pset_ManufacturerTypeInformation
 Pset_PackingInstructions
 Pset_ServiceLife
 Pset_Warranty

Table 615 — IfcStackTerminal Property Sets for Objects



Quantity Sets

The Quantity Sets concept applies to this entity as shown in Table 616.
Name
Qto_StackTerminalBaseQuantities

Table 616 — IfcStackTerminal Quantity Sets



Material Constituents

The Material Constituents concept applies to this entity as shown in Table 617.
NameDescription
CasingMaterial from which the casing is constructed.

Table 617 — IfcStackTerminal Material Constituents



Port Nesting

The Port Nesting concept applies to this entity as shown in Table 618.
PredefinedTypeNameFlowTypeDescription
BIRDCAGEExhaustSINKEXHAUSTExhaust inlet.
COWLExhaustSINKEXHAUSTExhaust inlet.
RAINWATERHOPPERRainSINKRAINWATERRainwater outlet.

Table 618 — IfcStackTerminal Port Nesting




XSD Specification:

 <xs:element name="IfcStackTerminal" type="ifc:IfcStackTerminal" substitutionGroup="ifc:IfcFlowTerminal" nillable="true"/>
 <xs:complexType name="IfcStackTerminal">
  <xs:complexContent>
   <xs:extension base="ifc:IfcFlowTerminal">
    <xs:attribute name="PredefinedType" type="ifc:IfcStackTerminalTypeEnum" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>

EXPRESS Specification:

ENTITY IfcStackTerminal
SUBTYPE OF IfcFlowTerminal;
PredefinedType : OPTIONAL IfcStackTerminalTypeEnum;
WHERE
CorrectPredefinedType : NOT(EXISTS(PredefinedType)) OR (PredefinedType <> IfcStackTerminalTypeEnum.USERDEFINED) OR ((PredefinedType = IfcStackTerminalTypeEnum.USERDEFINED) AND EXISTS (SELF\IfcObject.ObjectType));
CorrectTypeAssigned : (SIZEOF(IsTypedBy) = 0) OR ('IFCPLUMBINGFIREPROTECTIONDOMAIN.IFCSTACKTERMINALTYPE' IN TYPEOF(SELF\IfcObject.IsTypedBy[1].RelatingType));
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

Formal Propositions:

CorrectPredefinedType :
CorrectTypeAssigned : Either there is no stack terminal type object associated, i.e. the IsTypedBy inverse relationship is not provided, or the associated type object has to be of type IfcStackTerminalType.

Inheritance Graph:

ENTITY IfcStackTerminal
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 IfcFlowTerminal
ENTITY IfcStackTerminal
PredefinedType : OPTIONAL IfcStackTerminalTypeEnum;
END_ENTITY;

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