The gantry crane, also known as a bridge crane, is a type of crane where the bridge is supported on the ground track by legs on both sides.

The structure consists of the gantry, large vehicle running mechanism, lifting trolley, and electrical parts, etc.

Some gantry cranes have legs only on one side, supported by the factory or pier on the other, known as semi-gantry cranes.

The overhead bridge of the gantry crane, including the main beam and end beam, legs, and lower crossbeam, etc., constitutes the structure.

To increase the crane's operating range, the main girder can extend beyond the support legs on one or both sides, forming a jib.

A crane trolley with an arm can also be used to expand the crane's operating range through the boom's pitch and rotation.