These are cranes with cantilevered arms and longitudinal sliding on the runways of the shed.
Their use is recommended for use of work islands, alternatively or in combination with bridge cranes.
Thanks to the motorized sliding, they are able to cover a longitudinal work area along the walls of the shed which are often difficult to reach with the bridge crane hook.
Moreover also lifting and trolley travelling are motorized, accelerating and actually facilitating handling and transport operations.