Transporter Bridges - an Illustrated History
The rationale behind transporter bridges was very simple; conventional high level bridges were unable to give the required clearance to tall ships, and other than when the gondola was crossing, they caused no obstruction of the waterway.
Of the 33 transporter bridges proposed in the 145 years since 1873, only 20 were actually built. Of these nine still survive in their original form but only five are currently in use. One each in Spain, Germany and France and two in the UK.
Whilst the basic principles remained the same, the actual deesigns varied considerably between different bridges, and these technical differences are explored very well here, along with the history of each bridge and proposal.
A fascinating read, very well produced, with over 360 photographs, both colour and B&W, plans and drawings. Hardback.