Decauville
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Paul Decauville (1846-1922) was a French pioneer in light railways. His major innovation was the use of ready-made sections of light, narrow gauge track fastened to steel sleepers; this track was portable and could be disassembled and transported very easily. The first Decauville railway used 400 mm (153⁄4 in) gauge; Decauville later refined his invention and switched to 500 mm (1 ft 73⁄4; in) and 600 mm (1 ft 111⁄2; in) gauge.
Starting in 1875, his company produced track elements, engines and cars. Those were exported to many countries, in particular to the colonial possessions of European powers. The French military became interested in the Decauville system as soon as 1888 and chose the 600 mm (1 ft 111⁄2; in) gauge track to equip its strongholds and to carry artillery pieces and ammunition during military campaigns. Decauville track was used during the French military expeditions to Madagascar and Morocco.
By the First World War, Decauville had become a military standard and the French and British eventually built thousands of miles of track. The German had a similar system, with normalized engines.
Decauville railways were widely used in construction yards, quarries, farms, cane fields and mountain railways up to the 1950s. The company also produced road vehicles and construction engines.
