The gantry crane is a fully rotating jib-type rail-mounted lifting device, supported by a gantry-shaped base (including legs and gantry structure), with the base capable of traveling along rails; the upper section is equipped with a 360° rotating lifting jib, integrating four major coordinated working mechanisms: lifting, luffing, slewing, and traveling:
Lifting mechanism: Mostly driven by winches or electric chain hoists, using wire ropes/chains to move hooks (or grabs, spreader beams, and other attachments) for lifting and lowering loads;