The gantry cranes consist of a main structure made with load-bearing box or profile beams coupled by means of a vertical support structure to the motorized sliding heads on the ground.
The lifting is carried out by means of a device which, according to the needs, differs between a hoist or a motorized rope winch sliding on the rail arranged on the upper flange of the beam.

The gantry cranes built by Adamantis can have as an accessory a slingbar which, associated with a particular carpentry installed on the crane legs, allows the lifting and subsequent emptying of wagons containing earth from the excavation of tunnels for roads or subways.