Defined in File Ifc4x1.h
IfcDuctSegment: public Ifc4x1::IfcFlowSegment¶
A duct segment is used to typically join two sections of duct network.
HISTORY New entity in IFC2x4
Type Use Definition IfcDuctSegment defines the occurrence of any duct segment; common information about duct segment types is handled by IfcDuctSegmentType. The IfcDuctSegmentType (if present) may establish the common type name, usage (predefined type), properties, materials, ports, composition, assignments, and representations. The IfcDuctSegmentType is attached using the IfcRelDefinesByType objectified relationship and is accessible by the IsTypedBy inverse attribute. If the IfcDuctSegmentType has ports or aggregated elements, such objects are reflected at the IfcDuctSegment occurrence using the IfcRelDefinesByObject relationship.
Property Use Definition The property sets relating to this entity are defined by IfcPropertySet and attached by the IfcRelDefinesByProperties relationship. They are accessible by the IsDefinedBy inverse attribute. Property sets may also be specified at the IfcDuctSegmentType, defining the common property data for all occurrences of the same type. They are then accessible by the IsTypedBy inverse attribute pointing to IfcDuctSegmentType.HasPropertySets. If both are given, then the properties directly defined at IfcDuctSegment override the properties defined at IfcDuctSegmentType. Refer to the documentation at the supertype IfcFlowSegment and ancestors for inherited property set definitions. The following property set definitions are applicable to this entity: Pset_DuctSegmentOccurrence (PSET_OCCURRENCEDRIVEN) Pset_DuctSegmentPHistory (PSET_PERFORMANCEDRIVEN) Pset_DuctSegmentTypeCommon (PSET_TYPEDRIVENOVERRIDE)
Quantity Use Definition The quantities relating to this entity are defined by IfcElementQuantity and attached by the IfcRelDefinesByProperties relationship. They are accessible by the IsDefinedBy inverse attribute. The following base quantities are defined and shall be exchanged with the IfcElementQuantity.Name = ‘BaseQuantities’. Other quantities, being subjected to local standard of measurement, may be defined with another string value assigned to Name. In this case a valid value for MethodOfMeasurement shall be provided.
Material Use Definition The material of the IfcDuctSegment is defined by IfcMaterialProfileSetUsage or as a fallback by IfcMaterial, and attached by the RelatingMaterial attribute on the IfcRelAssociatesMaterial relationship. It is accessible by the HasAssociations inverse attribute. Material information can also be given at the IfcDuctSegmentType, defining the common attribute data for all occurrences of the same type. The following keywords for IfcMaterialProfileSet.MaterialProfiles[n].Name shall be used:
Body: Material from which the duct fitting is constructed. Coating: The outer coating, if applicable. Insulation: The insulating wrapping, if applicable. Lining: The inner lining, if applicable.
Port Use Definition The distribution ports relating to the IfcDuctSegment are defined by IfcDistributionPort and attached by the IfcRelConnectsPortToElement relationship. If the duct segment occurrence is defined by IfcDuctSegmentType, then the port occurrences must reflect those defined at the IfcDuctSegmentType using the IfcRelDefinesByObject relationship. Ports are specific to the IfcDuctSegment PredefinedType as follows indicated by the IfcDistributionPort Name, PredefinedType, and FlowDirection:
Inlet (NOTDEFINED, SINK): The flow inlet. Outlet (NOTDEFINED, SOURCE): The flow outlet.
Figure 222 illustrates duct segment port use. Figure 222 — Duct segment port use
Whether the optional attribute PredefinedType is defined for this IfcDuctSegment.
IfcDuctSegment(std::string v1_GlobalId, ::Ifc4x1::IfcOwnerHistory *v2_OwnerHistory, boost::optional<std::string> v3_Name, boost::optional<std::string> v4_Description, boost::optional<std::string> v5_ObjectType, ::Ifc4x1::IfcObjectPlacement *v6_ObjectPlacement, ::Ifc4x1::IfcProductRepresentation *v7_Representation, boost::optional<std::string> v8_Tag, boost::optional<::Ifc4x1::IfcDuctSegmentTypeEnum::Value> v9_PredefinedType)¶