IFC 4.3.2.20250327 (IFC4X3_ADD2) under development

5.4.3.26 IfcFacilityPart

ABSTRACT This definition may not be instantiated

5.4.3.26.1 Semantic definition

IfcFacilityPart provides for spatial breakdown of built facilities. It may be further specialised according to the type of facility being broken down.

5.4.3.26.2 Entity inheritance

5.4.3.26.3 Attributes

# Attribute Type Description
IfcRoot (4)
IfcObjectDefinition (7)
IfcObject (5)
IfcProduct (5)
IfcSpatialElement (6)
IfcSpatialStructureElement (1)
Click to show 28 hidden inherited attributes
IfcFacilityPart (1)
10 UsageType IfcFacilityUsageEnum

Defines the convention used to subdivide or decompose the facility.

Table 5.4.3.26.A

5.4.3.26.4 Property sets

  • Pset_AirSideSystemInformation
    • Description
    • AirSideSystemType
    • AirSideSystemDistributionType
    • TotalAirFlow
    • EnergyGainTotal
    • AirFlowSensible
    • EnergyGainSensible
    • EnergyLoss
    • InfiltrationDiversitySummer
    • InfiltrationDiversityWinter
    • ApplianceDiversity
    • HeatingTemperatureDelta
    • CoolingTemperatureDelta
    • Ventilation
    • FanPower
  • Pset_PropertyAgreement
    • AgreementType
    • TrackingIdentifier
    • AgreementVersion
    • AgreementDate
    • PropertyName
    • CommencementDate
    • TerminationDate
    • Duration
    • Options
    • ConditionCommencement
    • Restrictions
    • ConditionTermination
  • Pset_Risk
    • RiskName
    • RiskType
    • NatureOfRisk
    • RiskAssessmentMethodology
    • UnmitigatedRiskLikelihood
    • UnmitigatedRiskConsequence
    • UnmitigatedRiskSignificance
    • MitigationPlanned
    • MitigatedRiskLikelihood
    • MitigatedRiskConsequence
    • MitigatedRiskSignificance
    • MitigationProposed
    • AssociatedProduct
    • AssociatedActivity
    • AssociatedLocation
  • Pset_SpaceAirHandlingDimensioning
    • CoolingDesignAirFlow
    • HeatingDesignAirFlow
    • SensibleHeatGain
    • TotalHeatGain
    • TotalHeatLoss
    • CoolingDryBulb
    • CoolingRelativeHumidity
    • HeatingDryBulb
    • HeatingRelativeHumidity
    • VentilationDesignAirFlow
    • DesignAirFlow
    • CeilingRAPlenum
    • BoundaryAreaHeatLoss
  • Pset_SpaceCommon
    • Reference
    • IsExternal
    • GrossPlannedArea
    • NetPlannedArea
    • PubliclyAccessible
    • HandicapAccessible
  • Pset_SpaceCoveringRequirements
    • FloorCovering
    • FloorCoveringThickness
    • WallCovering
    • WallCoveringThickness
    • CeilingCovering
    • CeilingCoveringThickness
    • SkirtingBoard
    • SkirtingBoardHeight
    • Molding
    • MoldingHeight
    • ConcealedFlooring
    • ConcealedFlooringOffset
    • ConcealedCeiling
    • ConcealedCeilingOffset
  • Pset_SpaceFireSafetyRequirements
    • FireRiskFactor
    • FlammableStorage
    • FireExit
    • SprinklerProtection
    • SprinklerProtectionAutomatic
    • AirPressurization
  • Pset_SpaceHVACDesign
    • TemperatureSetPoint
    • TemperatureMax
    • TemperatureMin
    • TemperatureSummerMax
    • TemperatureSummerMin
    • TemperatureWinterMax
    • TemperatureWinterMin
    • HumiditySetPoint
    • HumidityMax
    • HumidityMin
    • HumiditySummer
    • HumidityWinter
    • DiscontinuedHeating
    • NaturalVentilation
    • NaturalVentilationRate
    • MechanicalVentilation
    • MechanicalVentilationRate
    • AirConditioning
    • AirConditioningCentral
    • AirHandlingName
  • Pset_SpaceLightingDesign
    • ArtificialLighting
    • Illuminance
  • Pset_SpaceOccupancyRequirements
    • OccupancyType
    • OccupancyNumber
    • OccupancyNumberPeak
    • OccupancyTimePerDay
    • AreaPerOccupant
    • MinimumHeadroom
    • IsOutlookDesirable
  • Pset_SpaceThermalLoad
    • People
    • Lighting
    • EquipmentSensible
    • VentilationIndoorAir
    • VentilationOutdoorAir
    • RecirculatedAir
    • ExhaustAir
    • AirExchangeRate
    • DryBulbTemperature
    • RelativeHumidity
    • InfiltrationSensible
    • TotalSensibleLoad
    • TotalLatentLoad
    • TotalRadiantLoad
  • Pset_SpaceThermalLoadPHistory
    • PeopleHistory
    • LightingHistory
    • EquipmentSensibleHistory
    • VentilationIndoorAirHistory
    • VentilationOutdoorAirHistory
    • RecirculatedAirHistory
    • ExhaustAirHistory
    • AirExchangeRateTimeHistory
    • DryBulbTemperatureHistory
    • RelativeHumidityHistory
    • InfiltrationSensibleHistory
    • TotalSensibleLoadHistory
    • TotalLatentLoadHistory
    • TotalRadiantLoadHistory
  • Pset_SpaceThermalPHistory
    • CoolingAirFlowRate
    • HeatingAirFlowRate
    • VentilationAirFlowRateHistory
    • ExhaustAirFlowRate
    • SpaceTemperatureHistory
    • SpaceRelativeHumidity
  • Pset_ThermalLoad
    • OccupancyDiversity
    • LightingDiversity
    • ApplianceDiversity
    • OutsideAirPerPerson
    • ReceptacleLoadIntensity
    • AppliancePercentLoadToRadiant
    • LightingLoadIntensity
    • LightingPercentLoadToReturnAir
    • TotalCoolingLoad
    • TotalHeatingLoad
    • InfiltrationDiversitySummer
    • InfiltrationDiversityWinter
    • LoadSafetyFactor
  • Pset_Tolerance
    • ToleranceDescription
    • ToleranceBasis
    • OverallTolerance
    • HorizontalTolerance
    • OrthogonalTolerance
    • VerticalTolerance
    • PlanarFlatness
    • HorizontalFlatness
    • ElevationalFlatness
    • SideFlatness
    • OverallOrthogonality
    • HorizontalOrthogonality
    • OrthogonalOrthogonality
    • VerticalOrthogonality
    • OverallStraightness
    • HorizontalStraightness
    • OrthogonalStraightness
    • VerticalStraightness
  • Pset_Uncertainty
    • UncertaintyBasis
    • UncertaintyDescription
    • HorizontalUncertainty
    • LinearUncertainty
    • OrthogonalUncertainty
    • VerticalUncertainty
  • Qto_BodyGeometryValidation
    • GrossSurfaceArea
    • NetSurfaceArea
    • GrossVolume
    • NetVolume
    • SurfaceGenusBeforeFeatures
    • SurfaceGenusAfterFeatures
  • Qto_FacilityPartBaseQuantities
    • Length
    • Width
    • Height
    • Area
    • Volume

5.4.3.26.5 Concept usage

Concept Usage Description
IfcRoot (2)
IfcObjectDefinition (9)
IfcObject (5)
IfcProduct (18)
IfcSpatialElement (11)
IfcSpatialStructureElement (2)
Click to show 47 hidden inherited concepts
IfcFacilityPart (4)
Body Geometry General

In the case of alignment based infrastructure, the geometric representation can be defined using IfcSectionedSolidHorizontal or IfcSweptAreaSolid.

Product Local Placement General

The local placement for IfcFacilityPart is defined in its supertype IfcProduct. It is defined by the IfcLocalPlacement, which defines the local coordinate system that is referenced by all geometric representations or by IfcLinearPlacement which measures along a linear positioning element.

  • The PlacementRelTo attribute of IfcObjectPlacement shall point (if relative placement is used) to the IfcSpatialStructureElement of type IfcFacility, or of type IfcFacilityPart (e.g. to position a facility relative to a facility part complex, or a partial facility part to a facility part).
  • If the relative placement is not used, the absolute placement is defined within the world coordinate system.
Spatial Container General

If there are building elements and/or other elements directly related to the IfcFacilityPart (like most building elements, such as walls, columns, etc.), they are associated with the IfcFacilityPart by using the objectified relationship IfcRelContainedInSpatialStructure. The IfcFacilityPart references them by its inverse relationship:

Elements can also be referenced in an IfcFacilityPart, for example, if they span through several storeys. This is expressed by using the objectified relationship IfcRelReferencedInSpatialStructure. Systems, such as building service or electrical distribution systems, zonal systems, or structural analysis systems, relate to IfcFacilityPart by using the objectified relationship IfcRelServicesBuildings.

Quantity Sets General

This concept can be applied to the following resources:

Table 5.4.3.26.B

5.4.3.26.6 Formal representation

ENTITY IfcFacilityPart
ABSTRACT SUPERTYPE OF (ONEOF
(IfcBridgePart
,IfcFacilityPartCommon
,IfcMarinePart
,IfcRailwayPart
,IfcRoadPart))
SUBTYPE OF (IfcSpatialStructureElement);
UsageType : IfcFacilityUsageEnum;
END_ENTITY;

5.4.3.26.7 References

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5.4.3.26.8 Changelog

5.4.3.26.8.1 IFC4.2

  • New resource

5.4.3.26.8.2 IFC4.3_DEV_738df036

  • attribute, UsageType
  • abstract, Is now abstract