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03Feb94 UK: GALLIFORD BEATS THE CLOCK ON ROAD BRIDGE.

Contractor Galliford Eastern beat the clock in Bishops Stortford when it was given just 50 hours to replace part of a road bridge. The job was completed in 48 hours and 30 minutes, despite the old brick work proving harder than expected to remove.A 74 tonne replacement bridge deck was cast over six weeks on a nearby site and lifted into place using an 800 tonne Leibherr LTN1800 crane. The company said this method of bridge replacement had been used only once before in Britain.Hertfordshire county council's head of bridge engineering, Alan Armson, said a longer road closure would have caused unacceptable traffic disruption in the town's centre.He added: 'This method of bridge replacement is not possible in every case. It is certainly more expensive and we need to be able to acquire land nearby to pre-cast the bridge. But where it is possible it is our preferred option.' CONSTRUCTION NEWS