Crane for offshore applications
max. 5 000 Mt, 1 725 000 kNm | OMC
Huisman-Itrec
Our Offshore Mast Crane (OMC) is a compact design heavy lift crane using state-of-the-art technology and designed for the use on offshore construction vessels and semi-submersibles. Many of the Offshore Mast Cranes are suitable for ultra deepwater operations up to 5,000m water depth. They make use of a deepwater hoist system with a single line capacity up to 300mt. The deepwater hoist system consists of a traction winch and a storage winch and can also be equipped with an Active Heave Compensation System.
The crane consists of a steel mast with a rectangular footprint which can be easily welded to the bulkheads of the vessel structure. The rectangular footprint allows an installation of the crane directly on the stern of the vessel, achieving a large effective outreach. The mast is fitted with a rotating slew platform and mast head. The slew platform supports the main boom at the pivots. From the mast head the boom hoist tackle runs to the top of the boom and controls the radius of the different hoists. Slewing of the slew platform and boom is achieved by pinion drives mounted to the fixed mast and driving the lower slew bearing. The mast head follows the slew motion of the boom. The height of the mast provides a superior load curve compared to traditional cranes, especially on bigger radii. The load moment is carried by the mast and not by the slew bearings. The lower slew bearing is therefore no longer a critical construction item.
