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The vessel is equipped with two revolving cranes built by Huisman Equipment B.V., each with a capacity of 10,000 t (11,000 short tons); the main cranes can be operated in tandem to jointly lift 20,000 t (22,000 short tons). After its completion in 2019, SSCV Sleipnir succeeded Heerema's earlier SSCV Thialf as the largest crane vessel in the world.
The main hoist could lift 92 m (302 ft) above the work deck. The auxiliary hoists could lower to a depth of 3,000 metres (9,800 ft) below the work deck. A tandem lift using the main hoists could lift 9,000 short tons (8,200 t) at a 39 m (128 ft) radius.
In 1978, HMC commissioned Mitsui to construct the two sister semi-submersible crane vessels, DCV Balder and SSCV Hermod. These vessels could lift 5,400 tonnes with the twin cranes, and were later upgraded to 8,200 tonnes. [2] In 1988 HMC formed a joint venture with McDermott called HeereMac. [3] "Thialf" in a Norway fjord
SSCV Thialf is a huge semi-submersible crane vessel operated by the Netherlands-based Heerema Marine Contractors; it was the largest crane vessel in the world until the SSCV Sleipnir became the largest in 2019.
In February 2024, while due to undergo repair work, Saipem 7000 had a fatal allision with a small vessel in the Port of Rotterdam. [3] The Incident Report from the Dutch Safety Board stated that Rotterdam's pilots and the ship repair yard to carry out better planning before navigational evolutions in confined harbours. [4] [5]
During transit an SSCV is de-ballasted to a draught where only part of the lower hull is submerged. During lifting operations, the vessel is ballasted down. This way, the lower hull is well submerged. This reduces the effect of waves and swell. High stability is obtained by placing the columns far apart. The high stability allows them to lift ...
A drum hoist (steel wire rope visible) and motor. In underground mining a hoist or winder [1] is used to raise and lower conveyances within the mine shaft.Modern hoists are normally powered using electric motors, historically with direct current drives utilizing Ward Leonard control machines and later solid-state converters (), although modern large hoists use alternating current drives that ...
Lodbrok is a floating crane, in the harbor of Ystad 2020.. A crane vessel, crane ship, crane barge, or floating crane is a ship with a crane specialized in lifting heavy loads, typically exceeding 1,500 t (1,476 long tons; 1,653 short tons) for modern ships.