IFC 4.3.1.0 (IFC4X3_ADD1) development

6.1.4.17 Pset_RoofCommon

6.1.4.17.1 Semantic definition

Properties common to the definition of all occurrences of IfcRoof. Note: Properties for ProjectedArea and TotalArea added in IFC 2x3

6.1.4.17.2 Applicable entities

6.1.4.17.3 Properties

Name Property Type Data Type Description
Reference IfcPropertySingleValue IfcIdentifier

Reference ID for this specified type in this project (e.g. type 'A-1'), Also referred to as "construction type". It should be provided as an alternative to the name of the "object type", if the software does not support object types and no classification reference to a recognized classification system used.

Status IfcPropertyEnumeratedValue PEnum_ElementStatus

Status of the element, predominately used in renovation or retrofitting projects. The status can be assigned to as "New" - element designed as new addition, "Existing" - element exists and remains, "Demolish" - element existed but is to be demolished, "Temporary" - element will exists only temporary (like a temporary support structure).

AcousticRating IfcPropertySingleValue IfcLabel

Acoustic rating for this object. It is provided according to the national building code. It indicates the sound transmission resistance of this object by an index ratio (instead of providing full sound absorption values).

IsExternal IfcPropertySingleValue IfcBoolean

Indication whether the element is designed for use in the exterior (TRUE) or not (FALSE). If (TRUE) it is an external element and faces the outside of the building.

ThermalTransmittance IfcPropertySingleValue IfcThermalTransmittanceMeasure

Thermal transmittance coefficient (U-Value) of an element, within the direction of the thermal flow (including all materials).

FireRating IfcPropertySingleValue IfcLabel

Fire rating for this object. It is given according to the national fire safety classification.

LoadBearing IfcPropertySingleValue IfcBoolean

Indicates whether the object is intended to carry loads (TRUE) or not (FALSE).

Table 6.1.4.17.A

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6.1.4.17.4 Changelog

6.1.4.17.4.1 IFC4

  • property, AcousticRating
  • property, LoadBearing
  • property, Status
  • property, ThermalTransmittance
  • property, ProjectedArea
  • property, TotalArea

6.1.4.17.4.2 IFC4.3_DEV_9f90c1f0