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A tower crane is usually assembled by a telescopic jib (mobile) crane of greater reach (also see "self-erecting crane" below) and in the case of tower cranes that have risen while constructing very tall skyscrapers, a smaller crane (or derrick) will often be lifted to the roof of the completed tower to dismantle the tower crane afterwards ...
Stretch, a mobile crane, is going to replace an AC on the top of a tall building, with a little help from another crane, Little Brother. Stretch is ready to make the big lift while Gipsy Lady a Sikorsky s64 sky crane helps change ac units on the roof of a factory. 36. Machines Go To School
The company started out as a licensed manufacturer of the Linden Comansa America (LCA) [1] tower cranes. With time, the company started to produce cranes of its own design which were very competitive with the LCA cranes. By mid 1970s Krøll became very popular in North America and Northern Europe. By 1980 the company joined the Vølund Concern.
Each crane has a span of 140 metres (459 ft) and can lift loads of up to 840 tonnes to a height of 70 metres (230 ft). Their combined lifting capacity of almost 1,700 tonnes is one of the largest in the world. Prior to commissioning, the cranes were tested up to 1,000 tonnes, which bent the gantry downwards by over 30 centimetres (12 in).
Usually jib arms are attached to a vertical mast or tower or sometimes to an inclined boom. In other jib-less designs such as derricks, the load is hung directly from a boom which is often anomalously called a jib. A camera jib or jib arm in cinematography is a small crane that holds nothing but the camera. [4]
An aerial photo of the crane Chesapeake 1000, provided by the Westchester County Police, shot the day before the tugboat Specialist was raised to the surface of the Hudson River under the Tappan ...
The Manitowoc Company, Inc. is an American manufacturer which produces cranes and previously produced commercial refrigeration and marine equipment. It was founded in 1902 and, through its wholly owned subsidiaries, designs, manufactures, markets, and supports mobile telescopic cranes, tower cranes, lattice-boom crawler cranes, and boom trucks under the Grove, Manitowoc, National Crane, Potain ...
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