UP HERE IT’S ALWAYS WINDY

In the outermost northwest corner of Denmark – closest to the North Sea – strong winds are often posing particular challenges. This was also the case when BMS Krangården was to replace an 80-tons generator installed at about 85 metres in height on a two-winged Envision prototype wind turbine.

Two Liebherr LTM 1750-9.1 mobile cranes with 19 metres telescopic extension, 45.5 metres luffing fly jib and superlift were used for the task. It took about one day to raise the 750 tons cranes – and before that BMS Krangården unloaded the new generator from coaster to dock, using two medium-sized cranes for this part of the project.

The old generator had to be taken down and the new one installed at a certain angle. Therefore the lifting arrangement needed two built-in hydraulic pistons to adjust the slope of the goods during the lift.

Because of the wind turbine’s location close to the water – and due to a fixed workstation for the goods – BMS Krangården’s work area was relatively limited, and the task required significant technical planning. Among other things, the space around the turbine had to be modified with sand-coated pads and steel plates before the cranes could be brought into place.

BMS Krangården had several employees involved in the planning of the task, while colleagues from BMS Heavy Cranes took care of the commercial contact with Envision Energy. In addition, the job involved the crew responsible for the practical execution at Thyborøn harbour. As usual with large-scale jobs, BMS Group Engineering as well as the BMS Group HSEQ Department played a vital role.

Although the wind also worked hard to delay this particular project, the BMS crew succeeded in completing the entire job within the scheduled time.