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New 50m long steel beams weighing 100t are being installed this week on the replacement Montrose Bridge on the east coast of Scotland.

The original 75-year-old concrete bridge was lifted out last October after long term alkali-silica reactivity made it uneconomic to maintain (NCE 28 October 2004). Main contractor Balfour Beatty commissioned the Liverpool-based Mersey Mammoth marine crane to handle the beams, which have to be placed on the prepared bearings to an accuracy of plus or minus 10mm. Traffic on the busy A92 Dundee-Aberdeen road is currently using a temporary bridge alongside. The new bridge is due to open in the autumn.

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