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AD 517: Heavy concentrated loads on composite slabs

This note revisits the subject of concentrated loads on composite slabs. Earlier notes AD450 and AD477 considered how to design the slab, and particularly the …

New and revised codes and standards: from BSI Updates October 2023

BS EN PUBLICATIONS BS EN 1990:2023Eurocode. Basis of structural and geotechnical designsupersedes BS EN 1990:2002+A1:2005 and BS EN 1997-1:2004+A1:2013 BS EN …

Better can sometimes be worse – the dangers of over-strength

As engineers we are always concerned with strength – do we have enough resistance to cope with ultimate (ULS) levels of load? We then consider stiffness – …

New and revised codes and standards From BSI Updates September 2023

BS EN PUBLICATIONS BS EN 12152:2023Curtain walling. Air permeability. Performance requirements and classificationsupersedes BS EN 12152:2002 BS EN …

AD 515: Welding of structural nuts and bolts

SCI’s Advisory Desk has recently received queries from designers asking if it permissible to weld structural nuts and bolts – typically for situations …

Benefits of Steel Decking

Although most designers are familiar with composite construction, it is worth a reminder of the benefits that can be achieved and how design choices can have …

New and revised codes and standards, from BSI Updates July and August 2023

BS EN PUBLICATIONS BS EN ISO 13920:2023Welding. General tolerances for welded constructions. Dimensions for lengths and angles, shape and positionsupersedes BS …

AD 512: Eurocode requirements for wind bracing connections

AD 509 reminded designers that according to BS 5950, preloaded assemblies are not required when reversal is solely due to wind loading. The AD recommended that …

Protected portal frames on fire boundary

Where single storey buildings have external walls close to a site boundary, the walls are required to have fire resistance. Such external walls have commonly …

AD 510: P281 worked example of beams curved on plan

SCI publication P281 was published in 2001 covering the design of curved steel members, in accordance with BS 5950. It is clear that this guide is still used, …

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