Description: Single main beam gantry crane is mainly composed of mast, crane trolley, cart operating mechanism, driver's cab and electrical control system.

The door frame is a box-shaped single main beam and double-leg structure. The main beam adopts single beam off-track form. The legs and the lower beam form an L shape. Both sides of the outrigger are generally cantilevered. It has strong spanning ability when lifting objects, which facilitates the transfer of objects from spanning to under the cantilever. The trolley is suspended on the side, and the spreader is arranged on the side of the main beam.