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Balfour Beatty brings out the Hammers (1:40)

Michael Ghebreselassie explains how Balfour Beatty ensured the former London Olympic Stadium is ready for its new role as the home of West Ham United FC. We created the world’s largest cantilever roof to cover 60,000 football fans, adding 14 lighting towers to light up the action. With subtitles. #expertengineers