ALL TERRAIN CRANES Ӏ SECTOR REPORT
crane erection, and other jobs, will often offer the option of rigging a luffing jib. The new 300-tonner does not but it does offer a range of lattice boom extensions, many of which can be shared with other cranes in the Liebherr range. The crane can be transported
j
with its full boom, outriggers, and hook block, within axle loads of
Liebherr’s LTM 1300-6.3 has a 90m boom
12t. Even this is not light enough for some transport routes, where uses must keep below 10t per axle. To meet these requirements, the crane features Liebherr’s tele- separation system. This allows individual boom sections to be removed easily, simplifying the process needed to get the six-axle crane down to a total load of 60t.
Boom removal and reassembly can be made even easier with Liebherr’s self-assembly system. This allows the boom to be removed and fitted, without the need for an auxiliary crane. Like many of the crane’s lattice sections, this system can also be used on other cranes in the range, such as the larger LTM 1650-8.1 and the LTM 1450-8.1. That could make the six axle, 90m main boom, 300-tonner a useful part of a fleet of urban taxi cranes, able to take on occasional work at considerable heights, with a single boom self- assembly system and some lattice jib components, shared efficiently between larger cranes.
SET-UP SELECTION All of the Western mobile crane manufacturers have, over the last decade or so, been working to improve the optimisation of crane capabilities in awkward set-up conditions. Link-Belt’s system, offered on
the 300|AT, is V-Calc. Liebherr has been something of a leader in the development of these systems, and implements them in different combinations on different crane types. Liebherr’s variable outrigger
system is known as VarioBase. Like other systems, it lets an operator set outriggers up according to the space available, and then clearly see lifting capacities at different points around and away from the crane. On the LTM 1300-6.3, Liebherr is offering its VarioBase Plus system. This incorporates a double-stage extension system on the rear outriggers, increasing their maximum spread by two metres, to 9.4m. The front outriggers, with their single stage extension, do not reach out as far, but are lighter. This allows operators to increase the crane’s stability, while helping to optimise transport weights. Ballast can similarly be
f 20 CRANES TODAY
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