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HVCA DW August 16, | Author: pheed5 | Category: Duct (Flow), Specification (Technical Standard), Screw, Building, Building Engineering. DW/ is recognised throughout the UK as the Standard Specification for ductwork manufacture and installation. It came into being in when it replaced. Kent Ductwork manufactures standard galvanised ducting to the DW specifications, which achieves all of the current BS, EN & ISO standards.

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More information on the implications of the Construction Products Regulation and CE marking is available from the Construction Products Association which has published guidance developed with government agencies. In selecting the profile, consideration shall be given to Table 2. Fixing bolts required at each corner and at mm centres.

See Appendix G for more detailed guidance on the storage and protection of components. Smoke duct sections Reference Ducts for ventilation, pressurisation and kitchen extract Smoke control ductwork Ensures that the Fire Duct Manufacturer has tested to the BS EN Standards at a Notified Certification body and has ISO quality systems for manufacture and installation of the duct system, and that the fire duct system has 3rd party certification for the manufacture and installation on site. Intumescent dampers with a cold smoke leakage device may provide an E or ES classification to BS ENdepending on their individual design, their proposed method of installation and the construction they are to be mounted in to.

We firmly believe that this process has resulted in a publication that clearly demonstrates the high level of professionalism which exists within the ductwork community — and we take this opportunity of thanking all those who have contributed to its production. Similarly, the operating pressure will vary throughout the system and as leakage is related to pressure the calculations are complex.

Galvanised Ductwork – Galvanised Ductwork DW 144

The choice between the available methods of fixing will depend on the type of building structure and on any limitations imposed by the structural design.

Strength and leakage of circular sheet metal ducts. Shop Login Shop Sign Up. Service and Facilities The highest standards in the management and control of engineering services systems and facilities Read More. A trade organisation meeting the needs of building engineering services contractors involved with design, installation, commissioning, maintenance, control and management of engineering systems and services in buildings.


Appendix H sets out guidance notes, in summary form, of the access considerations that should be made by the system designer in terms of cleaning inspection and cleaning access. Factory-fitted proprietary synthetic rubber gaskets of the o-ring xw144 lip-seal type are also acceptable for socket and spigot joints on circular duct systems dctwork The basic requirements for storage are: Method for determination of the fire resistance of elements of construction general principles Method for determination of fire the resistance of load bearing elements of construction.

The insulation and vapour barrier should be abutted to the insulator incorporated into the duct support. Using suitable precautions when handling, transporting and installing the ductwork will help to minimise un-necessary damage. BS EN Cold rolled uncoated and zinc or zinc-nickel electrolytically coated low carbon and high yield strength steel flat products for cold forming.

Kent Ductwork Manufacturer Of Galvanised Ductwork DW

These are formed by the interaction of chlorine-based pool disinfection chemicals and organic compounds from bathers, notably sweat and urine. A cold finished reflective appearance retained through annealing. Single-blade dampers double-skin section are suitable for use in vw144 ducts, and shall have a maximum duct width of mm and duxtwork maximum height of mm.

This site uses cookies to give you the finest experience possible. Please copy and paste this embed script to where you want to embed Embed Script. How changes to the Apprenticeship Levy will affect the construction sector.

A CE mark means that a manufacturer claims that their product conforms to the minimum legal requirements for health and safety as laid down in EU directives. This consideration should also include recognition of all appropriate risk assessments.

Now includes expanded content related to: BS Schedule of paint colours for building purposes. The site storage of ductwork also introduces the additional important consideration of maintaining any factory applied protection and the internal cleanliness of the ductwork. Vw144 is applicable to vertical and horizontal ducts taking into account joints, air supply and exhaust openings as well as suspension devices and penetration seals.


This is due to the naturally occurring chromiumrich oxide film which is present on the surface of the metal, if damaged, reforms immediately by reaction ructwork the metal and the atmospheric or other source of oxygen. Sheet, strip and plate. They should be able to provide competent information, but this should be checked too. The same methods are applicable to vertical flat oval ducts. A detailed specification of materials and method of application is required.

Designers and surveyors should note ductwogk bills of quantities should provide a full description of the items required. Reviews User-contributed reviews Add a review and share your thoughts with other readers. However, if the system designer requires any ductwork dhctwork be fire resistant, the fire performance criteria for any fire resistant ductwork should be specified with the extent being identified on the specification and drawings.

Inspection openings and their closures. The implementation of an Environmental Management System EMS can assist a business in managing and meeting its increasingly heavy burden of responsibility for the future protection of the global environment. Checkout Complete the checkout process and pay online Read More.

DW Specification for Sheet Metal Ductwork – The BESA

The principle to be followed should be to make seams and joints as unobtrusive as possible. This means that dampers at ductwoork fire have to be open and remain open. BS EN Reaction to fire tests for building products. From 1 July it was a requirement that all fire resisting ductwork, fire dampers and smoke control dampers sold manufactured or from stock that has a European Product Standard must be CE marked.

The Health and Safety Commission HSC recommends that boards appoint one of their numbers to be the health and safety director.