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Common arrangement of work sections  
CAWS.jpg
Front cover of Common arrangement of work sections for building works
Author CPIC
Country  United Kingdom
Language English
Publisher CPIC
Publication date 1998
Media type Print (Paperback)
Pages 180
ISBN ISBN 0 9512662 5 X


The Common Arrangement of Work Sections CAWS, first published in 1987, is a working convention designed to promote standardisation of, and detailed coordination between, bills of quantities and specifications. It is part of the industry wide Coordinated Projects Information (CPI) initiative and has been used for the arrangement of the national Building Specification, the National Engineering Specification and the Standard Method of Building Works - Seventh Edition. During the last ten years it has come into widespread use for the arrangement of building project documents.

Developments in construction technology and feedback from usage have indicated that useful additions and amendments could be made. Most of the changes in this new edition are at a detailed level, but a number of new sections have been added, and a more detailed index has been included. The new edition aligns CAWS with the Unified Classification for the Construction Industry (Uniclass) which was published in 1997.

The Common Arrangement is the the authoritative UK classification of work sections for building work, for use in arranging project specifications and bills of quantities.

Over 300 work sections are defined in detail in order to give:

  • good coordination between drawings, specifications and bills of quantities
  • predictability of location of relevant information
  • fewer oversights and discrepancies between documents
  • flexibility to the contractor in dividing the project information into work packages.

The classification of work sections is separate from, and complementary to, the classification of other concepts such as building types, elements, construction products and properties/characteristics. Uniclass, published in 1997, is the definitive overall classification tables, one of which is for work sections for buildings, comprising the Common Arrangement group, sub-group and work section headings.

CAWS is produced and published by CPIC.

See also

External links

Example of sections

A full listing can be found at CAWS

• N13 Sanitary appliances and fittings • R10 Rainwater drainage systems • R11 Above ground foul drainage systems • R12 Below ground drainage systems • S10 Hot and cold water supply systems • S12 Water treatment equipment • S17 Water reclamation systems • S30 Compressed air supply systems • S32 Natural gas supply systems • S33 LPG supply systems • S41 Fuel oil supply systems • S60 Fire hose reel systems • S61 Dry riser systems • S62 Wet riser systems • S63 Sprinkler and automatic fire suppression systems • S65 Fire hydrant systems • T20 Gas and oil-fired boilers • T22 Electrode/direct electric boilers • T24 Solid fuel fired boilers • T25 Combined heat and power systems • T26 Solar collectors • T30 Heat emitters • T40 Heat pumps • T42 Underfloor/ceiling/wall heating • T51 Climatic ceiling and beam systems • T60 Central refrigeration plant • U10 Ventilation systems • U12 Kitchen extract ventilation • U14 Smoke and heat control systems • U30 Air conditioning systems • U41 Fan coil units • U42 VAV equipment/terminal units • U60 Local air conditioning systems • U80 Air ductwork & ancillaries • U81 Air handling units • U82 Fans • U83 Air filtration equipment • U84 Heating and cooling coils • U85 Heat recovery systems • U86 Air treatment systems • U87 Silencers and acoustic treatment • U88 Air terminal devices • V11 Low voltage connection • V12 Generator systems • V13 Small scale wind generating systems • V14 Photovoltaic systems • V30 Low voltage distribution systems • V31 Low voltage switchgear • V32 Low voltage cabling • V39 Electrical inspection and testing • V44 Uninterruptible power supplies • V55 Self-contained emergency lighting/signage systems • V56 Central battery emergency lighting/signage systems • V59 Luminaires and lamps • V60 External lighting systems • V80 Electrical identification • V81 Earthing and bonding systems • W11 Public address systems • W25 Presentation and conferencing systems • W30 Telecommunications systems • W40 Access control systems • W41 Intruder detection and alarm systems • W44 CCTV systems • W50 Fire detection and alarm systems • W53 Assistance call systems • W60 Lightning protection • X10 Lift/transport systems • X15 Escalator and moving walk systems • Y10 Pipelines • Y11 Pipeline ancillaries • Y12 Mechanical cleaning/chemical systems • Y20 Pumps • Y21 Tanks and cisterns • Y30 Mechanical thermal insulation • Y31 Vibration isolation mountings • Y32 Mechanical plant and equipment identification • Y40 Central controls/building management systems • Y50 Mechanical testing and commissioning • Y60 Conduits and trunking • Y63 Cable supports • Y65 Electrical accessories

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