2 January 2018
First published: 2 January 2018
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The Grenfell Tower tragedy in London last June was a stark reminder of how rapidly a fire can spread and the horror which it can cause. In the wake of this disaster, the UK construction industry is actively examining what can be done to minimise the risk of similar tragedies in the future. It is likely that one of the recommendations will be a clearer identification of responsibilities, but whatever the outcome it will clearly be helpful for all members of the design team to have a good understanding of all aspects of fire safety, as well as detailed knowledge about those aspects under their direct control.
The first edition of this book, authored only by Prof. Buchanan, was published in 2002. It was the first comprehensive publication in the field of structural fire engineering and a key reference for international undergraduate/postgraduate courses in this area. The field of structural fire engineering is rapidly evolving and there have been a number of developments since 2001 – notably the collapse of the World Trade Center towers in New York and subsequent research on the structural fire response of complex structures, and the rally in innovation of structural forms, construction methods and materials (modular construction, high-strength materials, etc). In this second edition, Prof. Buchanan was joined by Dr Abu and the authors tried to fill some of these gaps.
Performance-based structural fire design can play an important part in delivering iconic buildings. Early design team engagement with critical issues, including fire safety considerations, allows a holistic solution to be developed, in contrast to post-applied fire engineering which could severely compromise the original design intent. Four Pancras Square (London) is a successful example of where early fire engineering engagement has helped deliver an iconic design. The building features an external, fully load-bearing, weathering steel frame, with a storey-deep Vierendeel transfer truss. To allow the weathering steel to develop its protective patina and achieve the desired aesthetic, it must be left untreated and exposed; this is in conflict with traditional fire resistance solutions. This paper documents the key steps undertaken in realising the building and describes how they were tackled at the interface of the fire and structural engineering disciplines. These include quantification of the design goals, selection of the fire constraints, understanding the behaviour of unconventional steel, quantifying thermal exposure for external elements and, finally, quantification of structural response in fire.