Steel Bridge is the main load-bearing structure of the bridge using steel, namely steel bridge. Fabricated Steel bridges are widely used around the world. The original fabricated steel bridge was designed by British Engineer Donald Beire in 1938 at the beginning of World War II. The main design concept is to take the least type of unit components, assembled into a load-bearing, different span of the assembly-type Steel Bridge, and only the general medium-sized truck transport, under special circumstances can rely on all the manpower to build.

 According to the system classification, the steel bridges can be divided into beam bridge, arch bridge, cable-stayed Bridge, suspension bridge and so on.