|
Sheerleg
A floating sheerleg (also: shearleg) is a floating water vessel with a crane built on shear legs. Unlike other types of crane vessel, it is not capable of rotating its crane independently of its hull. There is a huge variety in sheerleg capacity. The smaller cranes start at around 50 tons in lifting capacity, with the largest being able to lift 10,000 tons. The bigger sheerlegs usually have their own propulsion system and have a large accommodation facility on board, while smaller units are floating pontoons that need to be towed to their workplace by tugboats. Sheerlegs are commonly used for salvaging ships, assistance in shipbuilding Shipbuilding is the construction of ships and other floating vessels. It normally takes place in a specialized facility known as a shipyard. Shipbuilders, also called shipwrights, follow a specialized occupation that traces its roots to befor ..., loading and unloading large cargo into ships, and bridge building. They have grown conside ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crane Vessel
A crane vessel, crane ship or floating crane is a ship with a crane specialized in lifting heavy loads. The largest crane vessels are used for offshore construction. Conventional monohulls are used, but the largest crane vessels are often catamaran or semi-submersible types as they have increased stability. On a sheerleg crane, the crane is fixed and cannot rotate, and the vessel therefore is manoeuvered to place loads. History In medieval Europe, crane vessels which could be flexibly deployed in the whole port basin were introduced as early as the 14th century. During the age of sail, the sheer hulk was used extensively as a floating crane for tasks that required heavy lift. At the time, the heaviest single components of ships were the main masts, and sheer hulks were essential for removing and replacing them, but they were also used for other purposes. Some crane vessels had engines for propulsion, others needed to be towed with a tugboat. In 1920, the 1898-built battles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Left Coast Lifter
''Left Coast Lifter'' is a floating derrick barge or sheerleg which was built to assist in the eastern span replacement of the San Francisco–Oakland Bay Bridge. The barge carries a shear legs crane which is the largest barge crane ever used on the U.S. West Coast. The barge's name is taken from "Left Coast", a slang term for the West Coast of the United States (which appears on the left side of a typical map and also refers to the region's liberal, or "left leaning", political tradition). Operational history ''Left Coast Lifter'' was built for the American Bridge/Fluor joint venture (ABFJV), which was the lead contractor on the self-anchored suspension eastern span replacement. The barge was built in Portland, Oregon by U.S. Barge, LLC and ferried to Shanghai, where it was fitted with a shear-leg crane manufactured by Shanghai Zhenhua Port Machinery Co. Ltd (ZPMC). The completed sheerleg was ferried back to the United States on a semi-submersible heavy-lift ship, ''Zhen Hu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pioneering Spirit
''Pioneering Spirit'' (formerly ''Pieter Schelte'') is a catamaran crane vessel owned by the Switzerland-based Allseas Group designed for the single-lift installation and removal of large oil and gas platforms and the installation of record-weight pipelines. The , vessel is the world's largest vessel by gross tonnage, and since September 2021 also the largest floating sheerleg in the world. It was built in South Korea by Daewoo Shipbuilding & Marine Engineering in 2013 at a cost of €2.6 billion. It commenced offshore operations in August 2016. Development The initial concept, by Allseas technical director W.P. Kaldenbach, was of a vessel capable of lifting entire platforms, and in 1987 Allseas declared its intention to build it. The initial idea featured two rigidly connected, self-propelled supertankers, with a large slot at the bows enabling it to install platform topsides in one piece. Early designs featured a flotation and ballasting system and active motion compensa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shear Legs
Shear legs, also known as sheers, shears, or sheer legs, are a form of two-legged lifting device. Shear legs may be permanent, formed of a solid A-frame and supports, as commonly seen on land and the floating sheerleg, or temporary, as aboard a vessel lacking a fixed crane or derrick. When fixed, they are often used for very heavy lifting, as in tank recovery, shipbuilding, and offshore salvage operations. At dockyards they hoist masts and other substantial rigging parts on board. They are sometimes temporarily rigged on sailboats for similar tasks. Uses On land Shear legs are a lifting device related to the gin pole, derrick and tripod (lifting device). Shears are an A-frame of any kind of material such as timbers or metal, the feet resting on or in the ground or on a solid surface which will not let them move and the top held in place with guy-wires or guy ropes simply called "guys". Shear legs only need two guys whereas a gin pole needs at least three. The U. S. Army Fie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smit International
Smit Internationale N.V. (or Smit International) is a Dutch company operating in the maritime sector. The company was founded in 1842 by Fop Smit as a towage company with only the 140 horsepower paddle steamer tug ''Kinderdijk''. Fop's sons, Jan and Leendert, continued the company under the name L. Smit & Co and expanded the fleet. In 1870, they began using tugs with propellers. After a merger in 1923 with Internationale Sleepdienst, the name was changed to "L. Smit & Co.'s Internationale Sleepdienst". Formerly listed at the NYSE Euronext stock exchange in Amsterdam, the company was fully acquired by Royal Boskalis Westminster in 2010. Takeover Dutch marine engineer Boskalis made an indicative €1.11 billion takeover offer for Smit on 15 September 2008. Despite the offer being promptly rejected by Smit's board, Boskalis subsequently built a stake of over 25% in the firm and expressed a continuing desire to buy a number of its business units. A revised offer from Boskalis of â ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crane (machine)
A crane is a type of machine, generally equipped with a hoist rope, wire ropes or chains, and sheaves, that can be used both to lift and lower materials and to move them horizontally. It is mainly used for lifting heavy objects and transporting them to other places. The device uses one or more simple machines to create mechanical advantage and thus move loads beyond the normal capability of a human. Cranes are commonly employed in transportation for the loading and unloading of freight, in construction for the movement of materials, and in manufacturing for the assembling of heavy equipment. The first known crane machine was the shaduf, a water-lifting device that was invented in ancient Mesopotamia (modern Iraq) and then appeared in ancient Egyptian technology. Construction cranes later appeared in ancient Greece, where they were powered by men or animals (such as donkeys), and used for the construction of buildings. Larger cranes were later developed in the Roman Empire, e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GPS Atlas And GPS Nadia
The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite systems (GNSS) that provides geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. It does not require the user to transmit any data, and operates independently of any telephonic or Internet reception, though these technologies can enhance the usefulness of the GPS positioning information. It provides critical positioning capabilities to military, civil, and commercial users around the world. Although the United States government created, controls and maintains the GPS system, it is freely accessible to anyone with a GPS receiver. The GPS project was started by the U.S. Department of Defense in 1973. The first prototype spacecraft was laun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Port Of Hamburg
The Port of Hamburg (german: Hamburger Hafen, ) is a seaport on the river Elbe in Hamburg, Germany, from its mouth on the North Sea. Known as Germany's "Gateway to the World" (''Tor zur Welt''), it is the country's largest seaport by volume. In terms of TEU throughput, Hamburg is the third-busiest port in Europe (after Rotterdam and Antwerp) and 15th-largest worldwide. In 2014, 9.73 million TEUs (20-foot standard container equivalents) were handled in Hamburg. The port covers an area of (64.80 km2 usable), of which 43.31 km2 (34.12 km2) are land areas. The branching Elbe creates an ideal place for a port complex with warehousing and transshipment facilities. The extensive free port was established when Hamburg joined the German Customs Union. It enabled duty-free storing of imported goods and also importing of materials which were processed, re-packaged, used in manufacturing and then re-exported without incurring customs duties. The free port was aba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antwerp Port Authority
The Port of Antwerp-Bruges is the port of the City of Antwerp. It is located in Flanders (Belgium), mainly in the province of Antwerp but also partially in the province of East Flanders. It is a seaport in the heart of Europe accessible to capesize ships. It is Europe’s second-largest seaport, after Rotterdam. Antwerp stands at the upper end of the tidal estuary of the Scheldt. The estuary is navigable by ships of more than 100,000 Gross Tons as far as 80 km inland. Like the Port of Hamburg, the Port of Antwerp's inland location provides a more central location in Europe than the majority of North Sea ports. Antwerp's docks are connected to the hinterland by rail, road, and river and canal waterways. As a result, the port of Antwerp has become one of Europe's largest seaports, ranking second behind Rotterdam by total freight shipped. Its international rankings vary from 11th to 20th ( AAPA). In 2012, the Port of Antwerp handled 14,220 sea trade ships (190.8 million t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Sheerleg")
.jpg "Click for more on -> Left Coast Lifter")
_(cropped).jpg "Click for more on -> Pioneering Spirit")
