MG model double beams gantry crane is a track traveling medium-heavy sized crane,it mainly consists of the skeleton structure, lifting trolley and cross traveling mechanism, long traveling mechanism, cabin,festoon cable and electrical control system. The trolley can move horizontally on a pair of rails on the main beam. The working class is A5, A6, A7, A8.
link:https://www.kinocranes.sg/gantry-crane/gantry-crane-by-capacity/75-ton-gantry-crane.html