The grab bridge crane is mainly composed of box bridge, grab trolley, crane running mechanism, cab and electrical control system. The fetching device is a grab.

The grab trolley is equipped with a lifting mechanism and an opening and closing mechanism. The grab is wrapped on the lifting and opening and closing drums with four steel ropes. The opening and closing mechanism drives the grab to close and grab the material. When the bucket mouth is closed, immediately start the lifting mechanism to make the four steel wire ropes evenly loaded for lifting. When discharging, only the opening and closing mechanism will be opened, and the bucket mouth will open and tilt the material.