Research, Codes & Investigations

Cass Hayward was an early exponent of BS 5400:Part 3 after publication in 1982 and has been providing specialist advice regularly to the Highways and Rail authorites since that time. Particular subjects have been application of the code for composite bridges, U –Frame stability and fatigue.

More recent studies have related to the development of Eurocodes, BS EN1994:Part 2 in particular and senior personnel are members of working groups WG3 for steel bridges and B525/10 – WG2 for concrete and composite bridges.

Cass Hayward undertakes design research and code drafting for Network Rail and prepared the new limit state Underbridge Assessment Code of Practice RT/CE/C/025 and related implementation documents. 

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This Code provides a modern limit state approach to assessment of rail bridges in steel, metals, concrete, masonry and timber. Research studies associated with the Code investigate reserve shear capacity in girder webs and rivets; real train load combinations; and the strength of wrought iron.

Cass Hayward is regularly involved in education of engineers in bridge design – lecturing to students, graduates and mid-career professionals. Since 2003 Cass Hayward has provided teaching of the steel bridges module for the MSc Advanced Structural Engineering Cluster at Imperial College, London.

Cass Hayward has written & contributed to industry- sponsored design guides & bridges texts  including those published by CIRIA, Steel Construction Institute, Corus and British Constructional Steelwork Association.

Professor Roger Johnson of Warwick University has been Consultant to Cass Hayward since formation of the firm 1983. Professor Johnson is widely regarded as the world’s  leading researcher in composite construction and was awarded the elite honour of the Institution of Structural Engineers’ Gold Medal in 2006.