Sarens installs offshore giants

Sarens helped to install two giant legs onto jack-up barges at the port of Bremerhaven, Germany.

The Sarens team used two Terex CC 6800 crawler cranes in a synchronised lift to raise the 630-tonne, 78 m structures, belonging to logistics company, RWE OLG with the assistance of a floating crane. They were installed on two jack-up barges: the Victoria Mathias and the Friedrich Ernestine, which were manufactured in South Korea and then shipped to Bremerhaven.

The Sarens team, employed by Lloyd-Werft Bremerhaven AG, set up the two crawlers with the same SSL-LSL configuration and a 108 m boom. A counterweight of 250 tonnes on the superstructure, 80 tonnes of central ballast and a 240-tonne superlift counterweight on the 24 m superlift boom, were also used. Spreader systems were also used to lift the legs evenly.

Once the jack-up legs had been placed in a stable upright position the floating crane was disconnected and removed, after which the legs were lifted to a height of 95 m by the two Terex cranes and swung within a working radius of 21 m above and beyond the vessel’s deckhouse until they reached the required position.