IFC 4.3.0.1 (IFC4X3) development

5.4.2.6 IfcBuiltSystemTypeEnum

5.4.2.6.1 Semantic definition

This enumeration identifies different types of built systems.

5.4.2.6.2 Type values

Type Description
EROSIONPREVENTION

A grouping of elements into a built system for preventing unwanted relocation of material particles in earthworks slopes or rock faces. Typical types of erosion prevention include:

  • Planting
  • Solid
  • Framework
  • Anchored framework
  • Shotcrete
  • Screening
  • Geosynthetics (geotextiles)
FENESTRATION

System of doors, windows, and other fillings in openings in a built envelope that are designed to permit the passage of air or light.

FOUNDATION

System of shallow and deep foundation elements that transmit forces to the supporting ground.

LOADBEARING

System of built elements that transmit forces and stiffen the construction.

MOORING

System of components and elements responsible for keeping or holding an element (a vessel, platform or set of catenary lines) in a desired position.

OUTERSHELL

System of built elements that provide the outer skin to protect the construction (such as the facade).

PRESTRESSING

System of elements providing pre-stressing to the structure, including typically manufactured products such as tendons, anchorages (active, dead, coupling), ducts, vents and deviators, and in-situ concrete segments, tendon spacers, blisters and additional reinforcements.

RAILWAYLINE

A set of functional tracks with explicit terminals. It is usually composed of a set of tracks with continuous track parts and alignments.

RAILWAYTRACK

Railway track system. It is usually composed of continuous sequences of track parts and alignments.

REINFORCING

System of elements providing reinforcing to the structure.

SHADING

System of shading elements (external or internal) that permits the limitation or control of impact of natural sun light.

TRACKCIRCUIT

A track circuit is an electric circuit of which the rails of a track section form a part, with usually a source of current connected at one end and a detection device at the other end for detecting whether this track section is clear or occupied by a vehicle. In a continuous signalling system, the track circuit can be used to transmit information between the ground and the train. Note: definition from IEC 60050-82.

TRANSPORT

System of all transport elements in a facility that enable the transport of people or goods.

USERDEFINED

User-defined type

NOTDEFINED

Undefined type.

Table 5.4.2.6.A

5.4.2.6.3 Formal representation

TYPE IfcBuiltSystemTypeEnum = ENUMERATION OF
	(EROSIONPREVENTION
	,FENESTRATION
	,FOUNDATION
	,LOADBEARING
	,MOORING
	,OUTERSHELL
	,PRESTRESSING
	,RAILWAYLINE
	,RAILWAYTRACK
	,REINFORCING
	,SHADING
	,TRACKCIRCUIT
	,TRANSPORT
	,USERDEFINED
	,NOTDEFINED);
END_TYPE;

5.4.2.6.4 References

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