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Efforts to ease Humber cable corrosion start

The Humber Bridge Board has begun work to protect suspension cables on the Humber Bridge by bringing in engineering specialists C Spencer to carry out dehumidification works.

The firm carried out cable inspection works last year and have also completed similar inspection and dehumidification work on the Severn Road and Forth Road bridges.

The system involves installing a series of injection and exhaust points to enable dry air to be forced along the 11,000t of steel wire that make up the main cables from four integrated plant rooms, built inside the bridge deck. This dries out the internal environment, halting corrosion.

C Spencer will also use specially developed gantries which crawl along the main cables instead of having to be lifted and lowered when changing location.

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