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Basil Jet wrote:
On 27/06/2019 11:48, David Cantrell wrote: On Tue, Jun 25, 2019 at 04:02:38PM +0100, Guy Gorton wrote: The only links Gatehampton has with transport.London is that the Thames is flowing towards London and the railway is running away from Paddington! But that is my excuse for mentioning this lovely viaduct by Brunell which was built at two diffrent times, using different brickwork techniques, the two being attached to each other their full length. The Grosvenor bridges crossing the Thames outside Victoria were built similarly, one track at a time, so that the old structure could be replaced without having to close Victoria station. I've always wondered if there is any advantage in having a multi-track bridge as opposed to several single track bridges with inch gaps between them. You'd think narrow bridges would be preferable with respect to maintenance, and also preferable in most conceivable catastrophes, but one wide bridge seems to be the usual choice. Cheaper, lighter? Probably less maintenance required? |
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