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Raising the roof


THE first section of T5's roof structure was lifted into place last week.

A team of 12 specialist engineers took ten hours to lift the 2,500-tonne section 39 m. It will be followed by five lifts between now and the end of the year to form the18,500-tonne roof.

T5 will be the largest single span building in the UK and the roof 's single wave effect is created by 22 steel box rafters forming perfect bow string arches supported along each side by 11 pairs of giant steel support abutments.

Strand jacking was used to lift the roof because height limitations ruled out cranes, as they would have interfered with the airport's radar.

Design and development director Mike Forster said:'Like the great structures created by Brunel, this will be a tribute to British engineering.'