The QD5t-320t electric double beam crane is a commonly used lifting equipment for loading, unloading, and handling various materials in various occasions. QD type is used in workshops, warehouses, or open spaces of industrial and mining enterprises; The grab bucket is suitable for handling bulk materials, and the electromagnetic suction cup is used for lifting magnetic black metals and their products. The double girder bridge crane generally adopts an aerial operation method, which is different from other ground operated cranes. Air operation refers to having a separate small operating room under the crane, while ground operation involves the operator holding a remote control.