SECTOR REPORT Ӏ RESIDENTIAL CONSTRUCTION
and extension lengths up to 42m; it can, for example, lift 1.5 t to a range of 18m at a height of 24m. Its more powerful hydraulic system increases speed by up to 70%, says Böcker, which means that it can operate at significantly improved speed. The unique ability of the crane, though, is that its mast can be raised to the true vertical, at a 90° angle, to point to the sky. “That is an advantage when working close to a high façade, and in many other housing applications also,” says Böcker’s marketing manager Britta Lewitz. Another innovation is in the
j And housing designs and methods are still changing. Prefabrication is a growing trend. “Last month I visited a factory that makes prefabricated housing units," continues Ezzatvar. “Our cranes were doing test lifts there, doing pick-and-carry and stacking the panels. So there is yet another type of crane helping make houses, even though it has evolved away from working on-site. And our Czech distributor is using our
Böcker’s AK42 truck crane...
cranes to erect the prefabricated units on site.” Another lightweight option,
... can transform into a tower crane
introduced by Böcker three decades ago in Europe and gradually gaining traction in the UK and the US is the aluminium-boom truck crane. Böcker’s latest addition to their range is mounted on an 18 t truck and is actually a steel-masted teleboom truck crane with an aluminium jib at the top. The AK 42 has a lifting capacity of six tonnes
strong boom joint, which can straighten out to 180 degrees, making the boom an extension of the mast. “That is ideal for picking up loads close to the crane or for working in tight set-up situations,” Lewitz adds.
When the mast is pointing upright setting the boom at right angles to it also enables the AK42 to function as a tower crane in miniature: a vertical mast supporting a horizontal boom. In this set-up loads can be transported into a building by telescoping out the jib: it can be telescoped out fully and at high speed under loads of up to 1,000 kg. The end result is in effect a tower crane mounted on an 18 t flatbed truck – which when travelling to the job site has also ample room on it for carrying building materials to the site. Böcker also have a new trailer
crane, the AHK 36e. It is the first battery-operated trailer crane with 230 V charging technology, which means it can be charged from any household supply as well as manoeuvring and setting-up on power from its battery. It has an 8 kW electric motor, lifts up to 2.4 t with low emissions and low noise, and reaches extension lengths of up to 36m with a gross vehicle weight of only 3.5t.f
CRANES TODAY 37
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