There are a large number and different types of floating cranes around the world.
Typical are the Dutch designed and built sheerlegs, which can be lowered backwards for sailing the world oceans to remote areas. The very large semi-submersible Deepwater Construction vessels and a several monohull offshore construction vessels. For bridge construction as well as installation of wind turbine foundations there are some interesting floating cranes available. The 1500 Tons floating sheerlegs "Matador 3"
It looks like a respectful bend to the 550 years old church tower of Dordrecht, The Netherlands, in reality the 1500 tons floating sheerlegs Matador 3 is waiting for passing the railway bridge near Dordrecht. Photo : Piet van Roon © Below the 2400 tons floating sheerlegs Taklift 4, which is prepared for sailing large distance.
The 2400 tons Floating Sheerleg , the Taklift 4 in Guanabara Bay (Brazil) Photo: Capt. Jan Plug
The floating Crane Rambiz with 3250 tons lifting capacity The Rambiz was originally designed on two pontoons formed as an H-shaped floating body to install heavy concrete girder for the Vasco Di Gama Bridge in Portugal. Thereafter the floating crane was sold to the Belgian company Scaldis, which successfully operates the crane for inshore and offshore installation projects. The H-Shaped hull form was modified to a monohull The Hermod (8,100 Ton), Balder (6300 Ton) and Thialf (14,200 Ton) are all Deepwater Construction Vessels and belong to the Heerema Group, a Dutch Offshore Installation Contractor.
Photo : Hans van der Linden - www.aerolin.nl- Aerolin Photo BV © DCV Balder is conversed in 2002 into a full class III DP deepwater construction vessel (DCV). This DCV concept combines the best of the well-known SSCV concept with a series of multi-functional deepwater tools.
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The Balder has a 2,700 t crane and a 3,600 t crane and operates a J-lay system on its DCV. The vessel has an overall length of 154 meters (505 ft) and a width of 86 meters (282 ft) read more
The crane vessel SSCV Hermod is capable of a tandem lift of 8,100 tonnes. The vessel has an overall length of 154 meters (505 ft) and a width of 86 meters (282 ft).
The Hermod was built in Japan in 1978 by Mitsui Engineering & Shipbuilding Company Ltd. The ship is 505 feet long and 282 feet wide. Its draft is currently 36 feet, but during our work we take in ballast water to increase the draft to 82 feet. This principle is known as semi-submersible. The Hermod is capable of a tandem lift of 8,100 t (9,000 short tons).
The biggest crane vessel in the world is still the DCV Thialf.
Photo : FLYING FOCUS luchtfotografie - www.flyingfocus.nl (c) SSCV Thialf is the world’s largest crane vessel. Its dual cranes provide for depth reach lowering capability as well as heavy lift capacity up to 14,200 tonnes.
The vessel has an overall length of 201.6 meters (661 ft) and a width of 88.4 meters (290 ft). The other large SSCV is the Saipem 7000 of Saipem, with a combined lifting capacity of 14,000 Tons.
Below the Dutch mono hull Crane Vessels Oleg Strashnov (5000 Tons) and Stanislav Yudin (2500 Tons)
The 5000 tons monohull DP Crane vessel Oleg Strahnov, installing wind turbine foundation tripods at Borkum West II Windfarm
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The 2500 Tons Offshore crane vessel Stanislav Yudin Also the Seven Borealis with its 5000 Tons Heavy Lift Mast Crane and Aegir with a 4000 Tons Heavy Lift Mast crane deserve to be mentioned in this review as well
Multipurpose Offshore construction / Pipe lay vessel equipped with a 5000 Tons Mast crane
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Heerema’s AEGIR during trails off the Korean coast with all cranes “up” - Photo : Dennis de Boer © 4000 Ts mast crane
The biggest monohull crane vessel is the 7500 tons Chinese "Lan Jing"
"Lan Jing" is a self-propelled pipelaying & crane barge, with test speed up to 12.55 knots and operation depth 300M. Its main parameters include total length of 239M, molded breadth of 50M, and moulded depth of 20.40M. “Lanjing”, equipped with an offshore engineering heavy crane with lifting capacity of 7,500T (fixed type) /4,000T (full swivel type), is a floating crane ship with the maximum single lifting capacity in the world. The application range of this vessel includes South China Sea, East China Sea, Bohai Sea, as well as shallow sea in Southeast Asia. Below an example of a 4000 Tons Chinese built monohull crane vessel
Chinese built and operated 4000 Tons Monohull crane vessel An alternative Floating crane for bridge construction is the Dutch engineered and built "Svanen" (8700 Ts lifting Capacity), now being used to install wind turbine foundations
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Uploaded on 2 Jun 2011
Floating Crane Svanen at work on the Oresund Bridge, Sweden-Denmark.
Oceanic 5000 is a DP2 Derrick Lay Vessel which can install offshore structures including jackets and topsides weighing up to 4400MT. The state-of-the-art Oceanic 5000 can also lay subsea pipelines utilizing her two double-joint stations resulting in considerable increase in lay rates. This video demonstrates installation of a 2000t jacket by launching method and a 1500t topside (deck) by lifting method.
The entire pipe lay assembly process is carried out below the main working deck. This allows maximum pipe storage above deck and more free deck space for structural installation; thereby providing a safer and more productive working condition.
The vessel is equipped with a specially-designed “piggy-back” system for the installation of carrier pipes to be simultaneously attached to the main trunk line during the lay operation.
The stinger is 74 meters long connected by a hinged A-frame to the stern.
The vessel is equipped with three 80T tensioners. The crane is designed to address the majority of lifting requirements including heavy lift installations, near shore lifting, and platform removal.
The lift capacities of the main block (4400mt at 37 meters) and the auxiliary block (800mt at 35 meters) enable the vessel to undertake an impressive range of projects. Moreover, the 3000T fully-revolving condition increases efficiency, workability and control of heavy lift operations.
Oceanic 5000′s relatively shallow draft provides access to work in shallow waters and fabrication yards. This versatility, combined with the ability to utilize both anchor and DP2 positioning systems, enable OMC the flexibility to perform the entire scope of work irrespective of water depths.
The vessel propulsion system, designed to transit at 12 knots, allows her to reach locations in a swift and cost-effective manner.