Cost-E?ective Steel Girder Rail Bridge Assessment Case Study steel girder rail bridge buckling assessment for 40 tonne lorries strength of structure proved by LUSAS All bridges in the UK needed assessing for a 40 tonne weight limit in order to meet new European legislation. As part of its bridge assessment program Railtrack plc required a 3 span skewed structure at London Road,Hackbridge, London to be assessed. Many steel bridges have been shown to fail assessment to design code BS5400 Part 3. Two consulting ?rms, both using LUSAS Bridge have proved a 40 tonne capacity on a structure that, according to the code, had insu?cient lateral restraint and would have required a severe weight restriction. The bridge carries the A237 across 2 railway lines south of Hackbridge station and consists of

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