Huisman has signed a letter of intent (LOI) with Yantai CIMC Raffles Offshore for the delivery of a 2,600-tonne leg encircling crane for OIM Wind’s BT-220IU turbine installation vessel
The LOI includes the option for another crane for a second installation unit.
With a 140-m long boom and 2,600-tonne lifting capacity, the leg encircling crane will enable OIM Wind to install next-generation wind turbine generators and foundations.
At its highest position, the crane’s main hoist will be capable of lifting a load of 2,600 tonnes to a hook height of approximately 165 m above main deck level.
The BT-220IU installation vessel was designed by CIMC’s engineering office in Yantai, China and its subsidiary Bass Tech AB in Sweden, based on technical input from OIM Wind Ltd.
The crane for the first unit will be built at the Huisman production facility in Xiamen, China. It will be electrically driven, resulting in a high level of positioning accuracy, efficient energy use, reduced maintenance and high reliability. A Huisman-developed slew bearing system will ensure reliable and accurate positioning of the crane.
What the company describes as a ‘unique Lambda boom design’ ensures a lightweight and stiff design. Stiff construction of the Lambda-shaped boom will reduce motion at the crane tip.
The crane will also have a small tail swing, allowing for optimised utilisation of free deck space.