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Design of the time

Main design responsibility for the strengthening of the Avonmouth Bridge's twin steel box girders fell to Hyder Special Structures, whose 'grandparent', Freeman Fox & Partners, carried out the original design in the late 1960s and early 1970s. The 1,400m long crossing is made up of three sections: the two approach viaducts, and the main river span with its two backspans. The challenge was to come up with a strengthening solution which caused minimum disruption to the holiday traffic ...

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