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Lift and separate

Bridges : Products and services

Bonnybridge Lift Bridge across the Forth & Clyde Canal near Falkirk is the world's first concrete vertical lift traffic bridge, claims the designer, movable structures specialist MG Bennett Associates.

Spanning 6.45m and carrying two lanes of traffic plus a footpath on each side, the £400,000 bridge was constructed by contractor C Spencer.

Hydraulic cylinders in each corner lift the 110t insitu concrete deck to a maximum height of 4.5m to allow larger boats to pass. Local authority highway standards and the road profile, sight lines and junctions ruled out a more common swing bridge alternative.

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