Balfour Beatty has completed engineering works to transform the former London Olympic stadium into a multi-purpose venue for West Ham United FC.
The works began in January 2014 and included the installation of the world’s heaviest anti-gravity roof, twice the size of the original lighting towers, which have been reintegrated into the stadium.
Sustainable measures included the reuse of over 6,000 m of cable, 3,800 lights, 1,000 mechanical components and 19,000 tonnes of recycled demolition material.
The contractor created 50 local apprenticeships and over 300 training opportunities during the works.
At its peak, 1,700 people were employed on site, with 3.4m man-hours worked in total.
Balfour Beatty major projects business managing director Stephen Tarr said: “From the very beginning we were focused on continuing the legacy of this historic venue, transforming it from its original use of a single-purpose venue to a multi-functional world class venue.”
Tarr said that they had utilised “some of the most complex engineering techniques” in order to deliver the project.
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In June, Construction News reported that the cost of converting the stadium into a multi-sport facility had risen to £272m, a figure confirmed by the London Legacy Development Corporation.
Balfour Beatty had won the £154m contract for the transformation work ahead of original stadium contractor Sir Robert McAlpine.
This followed an initial hike in cost as reported by Construction News last October, following complexities installing the stadium’s new roof.
At the time, the LLDC said that the roof required “significantly more strengthening work to the main roof truss”, originally designed to be taken down after the Olympic Games.