Advisory Desk: AD 295: Hollow Sections and Steel Grades - Advisory Desk: AD 296: Liquid metal assisted cracking andcold formed light gauge steel

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Advisory Desk AD 295 Hollow Sections and Steel Grades In the last few years steel grade structural hollow sections, which S355 has become the normal should be suitable for almost all production grade for both cold practical cases: formed (BS EN 10219) and hot finished (BS EN 10210) hollow Cold Formed Sections to BS EN sections used in structural 10219 S355 J2H: Brand name applications. Steel grade S275 – HYBOX® hollow sections are still produced, Hot Finished Sections to BS EN but can be difficult to obtain. 10210 S355 J2H: Brand name SCI therefore recommends that – Celsius® 355 structural designs using hollow sections should be based on steel grade S355. Contact: Thomas Cosgrove As noted in AD 271 Corus Email: t.cosgrove@steel-sci.com Tubes manufacture two ranges of Telephone: 01344 623345 The difference is… AD 296 The One Liquid metal assisted cracking and When it comes to steel decking, there is only one choice: cold formed light gauge steel knowledge. No-one has a bigger commitment to innovation.Richard Lees Steel Decking. No-one has more experience or No-one produces more exciting new products. And Only The occurrence of Liquid Metal they are rolled in to the required Only Richard Lees Steel Decking gives you all this and more: welded steel members has been that LMAC is not a problem with •a revolutionary new damping system for improving dynamicDesigners can be assureda superior range of profiles including the UK’s most specified;•shape. Assisted Cracking (LMAC) in galvanized hot rolled and performance of floors in steel framed buildings; highlighted by articles in the cold formed light gauge sections •a first class safety net service, and; construction press. However, manufactured from strip or sheet •synthetic fibre concrete reinforcement in collaboration with LMAC has not been observed that was galvanized prior to being Grace Construction Products Ltd. in cold formed light gauge steel formed into the required shape. sections. Such sections include: Number One It is thought that galvanizing Who else but the UK number one a steel section which contains • Purlins could give you so much in superior residual stresses will make the • Cladding rails products, service and support. section susceptible to LMAC. Hot • Light steel channel and z No compromise; no limits – just the rolled and welded sections contain sections certainties of the present and the residual stresses from the rolling • Floor decking possibilities of the future. and welding processes which are • Cladding systems. carried out before they are dipped in the galvanizing bath. Normal cold Richard Lees Steel Decking Ltd formed light gauge steel sections Contact: Mary Brettle Moor Farm Road West, The Airfield, are formed from sheets or strips Email: m.brettle@steel-sci.com Ashbourne, Derbyshire DE6 1HD, UK. that have been galvanized before Telephone: 01344 623345 Tel: +44 (0) 1335 300 999 Fax: +44 (0) 1335 300 888 Email: rlsd.decks@skanska.co.uk www.rlsd.com NSC February 2006 39


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