21.30 linear meters bridge, Simple panel - Simple level
Bailey bridge...A prefab portable bridge, designed for military use, with a maximum range of 64 meters. It does not require specific tools nor a heavy equipment to be constructed, its elements being small enough to be carried by truck and the bridge strong enough to allow for the passage of tanks.
It is considered as a military engineering example.
Source Wikipedia : (http://fr.wikipedia.org/wiki/Pont_Bailey).
Designed by M.Donald Coleman Bailey (1901-1985), civil engineer for the Ministry of the British Army.
This equipment can be used to build road-bridges with one or two circulation routes, an access ramp, in the implementation of piles or cranes.