CRAWLER CRANES Ӏ SECTOR REPORT
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lattice boom crawlers. Dwarfing machines such as that, but still mounted on crawler tracks, is Liebherr’s new 2,500t capacity LR 12500-1.0 lattice crawler. Positioned between its 1,350 tonne LR 11350 and the LR 13000, which has a lifting capacity of 3,000 tonnes, it was introduced in April of this year (2022) with the slogan ‘Game Changer for tomorrow’s energy’ – which fairly clearly states its intended applications. The first example has been
delivered to Sarens, and the primary use for the machine will be, as Liebherr expected and designed for, on wind farms, though in this case handling transport and shipment of offshore components for them. Offshore turbines and towers of course are larger and heavier than their on- shore cousins. Liebherr and its customers
believe there is a great is a deal of potential in this class and a growing market for these larger crawler cranes. “Handling enormous components for offshore wind turbines at ports, in particular, has become an important area of work for large crawler cranes,” says Liebherr, “and part weights are increasing all the time.” Such large capacities call for specialised design – in which respect the LR 12500-1.0 is a new departure. The key to high lifting capacities are wide lattice booms, Liebherr adds. Solutions to date have been a double boom like the PowerBoom or the widespread SX systems. However, the Liebherr designers chose a completely different path for the LR 12500-1.0: The wide, powerful HighPerformanceBoom is introduced into the turntable in an optimised way, Liebherr explains. This is made possible by a special superstructure front section, which is transported on a low-bed trailer
66 CRANES TODAY
Liebherr’s 2,500t LR 12500-1.0, designed to erect wind farms
at a width of four metres. The slewing platform is
supplemented by a 3.5 metre wide rear section. Two Liebherr six-cylinder in-line engines deliver a total of 800 kW. They have a redundant design to increase the crane's availability.
The intermediate sections of the HighPerfomanceBoom each measure 10 metres in length and are reduced to an economical transport size by a special integrated mechanism. The chain is removed and placed in containers for transporting the crawler carriers, each of which weigh around 150 tonnes. The remaining chain girder is divided and moved on two low loaders.
The LR 12500-1.0 is designed
for a transport width of 3.5 metres. Only two components of the new 2,500 tonne crane have a transport width of four metres. A 100 metre main boom and a 108 metre luffing jib give it a maximum hook height of around 200 metres. “The new 2,500 tonne crawler crane has also been designed to cover future requirements,” says Liebherr. “Interest in it is correspondingly high.” Which Sarens confirms. “The high lifting capacity of the LR 12500-1.0 is the outstanding feature for us,” said managing director Carl Sarens. “We are particularly focussing on jobs in renewables for it. Handling
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