EEW Special Pipe Constructions' Monopile Lifting Gantries Designed by Sarens – Heavy Lift News
11 Aug 2023

EEW Special Pipe Constructions’ Monopile Lifting Gantries Designed by Sarens

Sarens recently completed a project on behalf of client EEW Special Pipe Constructions GmbH, experts in producing monopiles that serve as foundation piles for offshore wind turbines.

So that EEW SPC could offer their clients greater flexibility from their yard in Rostock, Germany, they asked Sarens to engineer a solution for lifting monopiles from their transport combination and into clients’ cradles. These cradles are designed to support and secure the monopiles on deck carriers during transfer at sea.

Because of our previous experience on projects like Fecam, Sarens was able to design a flawless solution that would fit EEW SPC’s needs like a glove.

The main challenge to address was that each monopile had different dimensions, weighing between 375t and 1.900t with a 23m – 85m length and diameter variation between 8m – 9,75m. To accommodate every possible type of monopile, Sarens designed a system with two gantries capable of lifting 1.900t. The two gantries were engineered to a height of 24m and width of 25m, and positioned atop two tracks of steel mats. Each was equipped with two 650t strandjacks connected to a spreader bar to handle all possible monopile diameters.

So that the lifting system could be adapted to the required longitudinal lifting position for each monopile, one gantry was designed to be moved via SPMTs. This ensured a maximally flexible system for handling differently sized monopiles.

A key challenge Sarens had to address during the design phase was the time pressures inherent in such projects: the team had to minimise time used in execution as installation vessels would be waiting. As a result, Sarens engineered a time-saving system that would connect and disconnect the slings in a very short time. Sarens engineers worked closely with senior operational colleagues to find the best possible solution and equipment to pull this off.

Sarens presented the completed solution in March, when the system went into operation to the client’s satisfaction. Sarens is proud to have been part of designing this ingenious solution and would like to congratulate the engineering and operations teams that made it possible!


Source Sarens

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