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(Photo: Amec)

A £41M project to give a new lease of life to Waterloo station’s steel roof was one of five winners in the Institution of Civil Engineers’ prestigious Historic Bridge and Infrastructure Awards.

Dating from between 1902 and 1922, the roof covers 19 platforms and is the largest train shed in Europe at 28,000m².

By 1999 maintenance costs had become prohibitive. After a feasibility study of repair and replacement options Network Rail decided to retain the main structure and replace the life-expired roof covering.

Steelwork contractor McNealy Brown dismantled a total of 380 high level trusses which were grit-blasted and galvanised off-site, then replaced in their original location. The primary steelwork was grit-blasted and repainted in situ. A new laminated glazing system completed the transformation.

The judging panel said: “Excellent conservation. The vast roof is essentially the same as when it was built, but daylight without drips can now be enjoyed by the thousands who use Waterloo every day.”

Network Rail was client and project manager and Amec was main contractor.

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