They distinguish themselves for the optimal use of the available height, as they do not have boom support tie-rods; differently from the GBC-type column-mounted cranes, the GBT-type allow, a greater hook run during lifting, equal to the useful space. Boom rotation is regulated by an adjustable braking device. The column-mounted crane must be anchored to the ground with a foundation plinth. Alternatively, pressure adjusting screws or appropriately-sized chemical fasteners can be used for small capacities; in this case it is recommended to contact our technical office.