A Bailey bridge is a strong temporary bridge built to a design devised in 1941
for military use by the British civil engineer Donald Coleman Bailey (1901–1985).
The steel lattice girders can be assembled by groups of six men from easily
manhandled component parts and cantilevered across a gap to provide a bridge
to carry 70 tonnes over spans of up to 45 meters (150 feet). The design,
a variant of which, resting on plywood floats called "pontoons," is used
for crossing broad rivers, has proved of lasting value in peacetime emergencies.
|The Bailey bridge that was erected at Langwathby,
Cumbria, in 1968 when the former sandstone bridge was washed away
by floodwater. It has been there ever since.