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Bild und Text von ARUP

St Mary's Island was originally part of the Chatham Dockyard in Kent, but has since been cut off by the construction of three large basins. In 1994 mixed residential development was planned for the island creating the need for a link between island and mainland.

Arup was responsible for the civil and structural engineering of the Chatham lifting bridge which carries two lanes of traffic to St Mary's Island, and was opened in 1996. The bridge has an all steel orthotopic trough deck which is opened by two hydraulic rams, leaving a clear waterway 12 metres wide enabling boats to pass. The piers and the side spans are in reinforced concrete and have smooth gently curved surfaces, which help to emphasise the clean flowing form of the whole bridge.

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