Model QD hook bridge crane is mainly made up of crane span structure, crane running structure, trolley, electric equipments and so on. According to the differences of using class and load condition, it can be divided into A5, A6 these two working classes. Directions of driver's room platform entrance contain side entrance, end entrance and up entrance. The conductive of crane can use safety sliding contact line or angle steel. The action operating modes of this crane have ground control, remote control and drive-room control, you should state it clearly while ordering.