IFC 4.3.0.1 (IFC4X3) development

5.4.4.20 Pset_SiteCommon

5.4.4.20.1 Semantic definition

Properties common to the definition of all occurrences of IfcSite. Please note that several site attributes are handled directly at the IfcSite instance, the site number (or short name) by IfcSite.Name, the site name (or long name) by IfcSite.LongName, and the description (or comments) by IfcSite.Description. The land title number is also given as an explicit attribute IfcSite.LandTitleNumber. Actual site quantities, like site perimeter, site area and site volume are provided by IfcElementQuantity, and site classification according to national building code by IfcClassificationReference. The global positioning of the site in terms of Northing and Easting and height above sea level datum is given by IfcSite.RefLongitude, IfcSite.RefLatitude, IfcSite.RefElevation and the postal address by IfcSite.SiteAddress.

5.4.4.20.2 Applicable entities

5.4.4.20.3 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.

BuildableArea IfcPropertySingleValue IfcAreaMeasure

The area of site utilization expressed as a maximum value according to local building codes.

SiteCoverageRatio IfcPropertySingleValue IfcPositiveRatioMeasure

The ratio of the utilization, TotalArea / BuildableArea, expressed as a maximum value. The ratio value may be used to derive BuildableArea.

FloorAreaRatio IfcPropertySingleValue IfcPositiveRatioMeasure

The ratio of all floor areas to the buildable area as the maximum floor area utilization of the site as a maximum value according to local building codes.

BuildingHeightLimit IfcPropertySingleValue IfcPositiveLengthMeasure

Allowed maximum height of buildings on this site - according to local building codes.

TotalArea IfcPropertySingleValue IfcAreaMeasure

Total planned area for the site. Used for programming the site space.

Table 5.4.4.20.A

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5.4.4.20.4 Changelog

  • property, FloorAreaRatio
  • property, Reference
  • property, SiteCoverageRatio