Fujian Mulanxi Bridge is an 80-meter double-track, composite girder steel truss through bridge. The main truss span is 80 meters; and its total length is 82 meters; the truss height is 11.5 metres; the centre distance of transverse bearings is 15 meters; the deck truss width is 15 meters; the total width of the deck is 13.96 meters; the main span adopts overall nodes. The works total about 1,388.9 tons.