Page 89: of Maritime Reporter Magazine (April 2015)

Offshore Edition

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Close-up: Mammoet strand jacks and power packs installed on the platform legs construction, the strand jacks were also installed to prepare for the jack down of the DCP’s legs and to raise the platform into place. To keep the platform level during the installation process, some of the strand jacks need to make upward movements, while others make downwards movements at the same time.

In other words, different strand jacks must be active simultaneously in opposite directions to buffer the up- wards and downwards movement of the DCP before the legs are positioned and the platform is raised out of the water.

To facilitate this precise calibration, part of the strand jack installation included special ‘guying valves’ and a new computer system to create a constant tension to deal with the movement of the platform on the water.

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