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Joint venture contractor SIAC/Wills Brothers has combined precast and cast insitu concrete techniques to build a new £4M, 125m long road bridge across Ireland's River Erne, County Donegal, in a brief 10 months. The deck is supported on fl at-sided columns that radiate from twin arches. The arches were cast insitu, but the columns were precast and supported on bespoke cradles until they could be tied into the arch and deck. Conventional shuttering was used to form the concrete deck's central spine and two sets of travelling shutters used to cast the deck's cantilevered 'wings'. The last pour takes place next week. Designer is Gifford, with falsework and formwork supplied by RMD. The bridge is part of the £27M Ballyshanon to Bundoran bypass for client Donegal County Council.

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