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Wednesday 28 December 2016

British floating crane Mammoth built at Schiedam, Netherlands according to the Dutch newspaper Schiedamsche Courant dated 27 August 1920

An item reported that the large floating crane which recently made a successful trial on the river departed accompanied by the tug Witte Zee towards Liverpool, England. The edition of a day later reported that the 200 tons floating electric derric and turnable crane Mammoth left the shipyard Gusto v/h A.F. Smulders in Schiedam towards Liverpool. She was built for the Mersey Docks and Harbour Board in Liverpool. The dimensions of her hull were 47 x 27 x 4,93 (hold) metres. Her design was comparable with other built by this shipyard although she was an improved version. Especially the lifting of loads less than 60 tons was improved and she had now a twin screw propulsion. The maximum height of the leg was 75 metres above the surface and with a maximum flight of 56 metres for 60 tons and 33,50 metres for 200 tons. All movements were executed with independent electric engines powered by the power plant on board. Further more was she fitted out with the needed steam winches and an independent electric lightning installation en all necessary equipment. She was at that moment the crane with worlds largest lifting capacity.(1)

Note
1. The Dutch newspaper Vlissingse Courant dated 2 July reported that a day earlier an arm was fitted on an enormous floating crane the largest of the world. Her lifting height was more as 62 metres and the flight of the arm 57 metres. The crane was fitted on a turret placed on a turret making it possible turning 360 degrees with a load of 200 tons. The fitting of the arm started at 04.00 o’clock and was completed at 22.00 o’clock. Before the start was the arm with a weight of 250 tons laid down on the pontoon. Three large floating cranes were used to lift the arm from the deck of the pontoon and placing it on a construction placed on some barges making it possible to lift the heaviest part of the arm higher and fit it with three pins each with a weight of 750 kilos to the pivot of the crane. Next step was to lift the point by the two floating cranes and were heavy tie-rods fitted to the movable ballast closet to make it possible to alter the positions of the arm.