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Engineers have decided to stick with original plans to replace the seven year old roller bearings on the M6 Thelwall Viaduct with spherical sliders. Analysis by managing agent Atkins of the structure's behaviour proved that replacement roller bearings would not be needed (see News last week). The contract to replace the remaining bearings will be let at the end of July. So far 37 bearings of the total 136 rollers have failed.