The derrick crane is a mast crane, the top of the mast of which is fixed by means of rigid rods (jib racks). The mast and boom are attached to the slewing platform on which the mechanical and electrical equipment of the crane is located. Mast, boom, jibs - square truss structure. The derrick crane is permanently installed on the foundation and has three reference points: at the base of the mast and the lower jib nodes. The angle between the jibs in the plan is 90 °. Articulated boom and jib mounts provide boom pivot and lift.
Carrying capacity, tons 25
Departure of the crane jib, m 40
Depth, max. achievable (boom at 82 °), m 60