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25 April 2008

Watson Steel Structures in the UK called in Crane Services Heavy Crane Division to erect a new bridge arch over the River Clyde in Scotland to take an all in one tramway, road and pedestrian crossing. A major challenge was that the cranes had to stand on an existing bridge. Crane Services and Watson engineers devised a scheme to stand two 500 tonne capacity Liebherr LTM 1500s in three positions. To position the 150 tonne end sections the cranes were rigged on main boom, then the rig was changed to include a 21 m luffer to position the 155 tonne centre section. A further challenge was the curvature of the main bridge that meant the front of the cranes had to be blocked up by more than 800 mm.

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