PMV Middle East



Mammoet has announced a fixed jib configurat­ion for the SK6000 that will allow offshore wind developers to reach deeper waters and significan­tly cut the cost of floating wind assembly.

Fixed bottom turbines and their foundation­s are growing fast, so that projects can be built further from the coast where winds are stronger and greater yields can be achieved. As a result, jackets and monopiles are reaching both the height and weight capacity of the world’s largest cranes.

As the industry moves towards 20MW turbines, floating wind components continue to grow in size and weight. This increases the need for a modular approach, to speed up the constructi­on process and allow developers to install more floating turbines in reduced weather windows.

With the launch of the SK6000, Mammoet is providing the next generation crane needed to install next generation turbines. Now, with its existing, patented, fixed jib configurat­ion, lifts of 3,000 tonnes at 220m height become a reality.

This new fixed jib configurat­ion allows lifts of 3,000 tonnes at 220m. This enables the crane to load out floating foundation­s using its main boom, and then immediatel­y use its fixed jib to assemble the turbine tower. No reconfigur­ation will be necessary between scopes, further improving build efficiency.

Mammoet technical expert Jeremy Haylock, said: “We don’t look at the SK as just a crane, but we look at it as a system as well. If you look at the SK of today compared to when it was first launched, it has evolved considerab­ly. This isn’t a surprise because it was always the basis of our original design philosophy, and we wanted to develop a product that would be scalable and agile. Because the world is developing so quickly, and the changes around us are so vast, our aim was to deliver a product that would allow us to grow in real time with our customers.”

The SK6000 fixed jib is the latest evolution in a crane series that allows small adjustment­s to have a large effect on performanc­e, avoiding the need to research, develop and fabricate an entirely new crane.

Jeremy added: “As with every part of the SK , when we developed t he fi xed jib, we wanted to include room for growth. With the SK6000 jib we are employing that additional capacity through small adjustment­s to the original design. The fixed jib is fully forward and backward compatible through the SK

series, meaning our customers can realize its potential, regardless of the applicatio­n.”

Mammoet created the SK6000 based on the design of its existing SK190 and SK350 cranes to keep pace with the increasing size of FPSO and FLNG modules. Capable of lifting 6,000t, the crane can lower many floating foundation designs directly into the water and assemble wind turbines from a single position. With a maximum hook height of over 175m and a reach of 144m, it can install turbines at towering heights, even when towers lie at the centre of the floating foundation. Mammoet plans to incorporat­e the new jib design into its future offshore wind project proposals, for deployment to a suitable project at the first possible opportunit­y.

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