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EXTENDED SPANS: Radical design concepts for the next generation of suspension bridge have been patented by a British consultant engineer backed by the Steel Construction Institute. The structural form, which uses an array of horizontally tensioned cables to support a lightweight road deck, is thought capable of spanning in excess of 3.5km and has already been put forward as a contender for the 7km replacement for the Oakland Bay crossing in San Francisco. Designer Gordon Rose said the ...

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