Sarens installs offshore giants

29 October 2012

Sarens uses two Terex CC 6800crawler cranes for Bremerhaven installation.

Sarens uses two Terex CC 6800crawler cranes for Bremerhaven installation.

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.

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