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Liebherr has the world's most powerful and tallest crawler crane in its LR 13000. It is capable of lifting 3,000 tonnes (2,953 long tons; 3,307 short tons) and has a maximum pulley height of 248 metres (814 ft).
The XGC88000 crawler crane became the largest tracked mobile crane in the world, [7] [8] [9] beating out the previous record holder, the Liebherr LR 13000 when it officially came into production in 2013. However, when it comes to absolute size, movability, and strength, the title still goes to the Honghai Crane which runs on rails.
In 1959 crane expert R.H.Neal, hydraulics specialist F.Taylor, and design director Bob Lester, integrated all three and modernized cranes. The Coles Hydra Speedcrane appeared in 1962, further modified with the 10-ton fully telescopic hydraulic boom in 1966, followed in 1968 by the 30-ton "Husky" military versions with four-wheel drive .
The German-based Liebherr Group crawler crane LR 11350 [31] [32] involved in the incident was operated by the Saudi Binladin Group, who are the main organization managing the expansion of the Great Mosque and also responsible for a large amount of major building contracts in Mecca and around Saudi Arabia. A report by Liebherr later stated that ...
Crawler cranes range in lifting capacity from about 40 to 4,000 long tons (44.8 to 4,480.0 short tons; 40.6 to 4,064.2 t) as seen from the XGC88000 crawler crane. [58] The main advantage of a crawler crane is its ready mobility and use, since the crane is able to operate on sites with minimal improvement and stable on its tracks without outriggers.
A level-luffing crane is a crane mechanism where the hook remains at the same level while luffing: moving the jib up and down, so as to move the hook inwards and outwards relative to the base. [ 1 ] Usually the description is only applied to those with a luffing jib that have some additional mechanism applied to keep the hook level when luffing.
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