The GBC-type cranes are distinguished by extreme lightness of boom rotation, which is obtained with the use of a special press-bent steel section. The pulley tackle-holder trolley runs inside this section and has nylon wheels, turning on permanently lubricated ball bearings allowing increased smoothness. 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.