Patented in the years immediately preceding the Second World War, it was a mechanical engineering tool of exceptional importance. It was used by English forces during the military operations of the Italian campaign: almost 2500 of these tools were assembled during the War and in Romagna 23 of these, only in the month of November 1944, were disassembled after a few weeks and reassembled elsewhere. The bridge was composed of metal and wooden modules and could be assembled in a few hours by teams of workers without mechanical means. Due to the resistance of the elements, the non-deformability of the larch beams, and the speed of assembly, it was an indispensable tool for temporary or emergency bridges and is still used today by Civil and Military Engineers and the State Railways.