Isambard Kingdom Brunel’s Swing Bridge was constructed of riveted wrought iron plates in 1849 to provide a crossing over the entrance lock for growing vehicular activity in Bristol Docks. It predates his Clifton Suspension Bridge. Denso paste has been applied to the underside of the bridge’s 4m dia forged iron rig to seal against water entering the deep rust-pits. Then the 3mm thick soft packers were wrapped with Denso Tape, bedded on to the new 20mm thick steel ring. This was then jacked up to bed on the underside of the old heavily-corroded ring to provide a new track for the bridge to run on.
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