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Newark Dyke Bridge, Whipple Murphy Truss
Trent Navigation, Newark-on-Trent, Nottinghamshire
associated engineer
Richard Johnson
date  1889
era  Victorian  |  category  Bridge  |  reference  SK799557
ICE reference number  HEW 777
In 1889, the Warren trusses on Cubitt's Newark Dyke Bridge were replaced by steel rivetted Whipple Murphy trusses designed by Richard Johnson, chief engineer of the GNR.
Whipple Murphy trusses feature vertical bracing members that divide the truss into 'panels'. They have a double N configuration. By contrast, Warren trusses have only slanting members set between the top and bottom horizontal members.
There are two trusses: one to take each track of the railway across Newark Dyke, the Newark navigation arm of the River Trent. They span 262ft and are 26ft deep at the centre -- the upper members are curved. They rest on the abutments of Cubitt's 1852 bridge.
Newark Dyke Bridge was used in the 1920s for practical trials concerning the dynamic loads on bridges created by steam locomotives. It was chosen for its straight approaches, which allowed the trains to travel at speed.
Contractor: Andrew Handyside
reference sources   CEH E&C

Newark Dyke Bridge, Whipple Murphy Truss