Double-beam suspension crane is a type of bridge crane running on elevated tracks, also known as overhead crane. The bridge of the bridge crane runs longitudinally along the tracks laid on the elevated tracks on both sides, and the lifting trolley runs horizontally along the tracks laid on the frame, forming a rectangular working range, which can make full use of the space under the bridge to lift materials without being hindered by ground equipment. Bridge cranes are widely used in indoor and outdoor warehouses, factories, docks and open-air storage yards.