QD general-purpose gantry crane mainly consists of the bridge, cart travel mechanism, trolley, electrical equipment and so on. According to different utilization levels and load states, it is divided into two working classes of A5 and A6. It is applicable for transport, assembly, maintenance, loading and unloading operations of the mechanical processing workshop, auxiliary workshop of the metallurgical plant, warehouse, material yard, power station and so on. The operating ambient temperature is -25℃~40℃, and use in the combustible, explosive and corrosive medium environment is prohibited.