SECTOR REPORT Ӏ ROUGH TERRAINS
on low-loaders worldwide. Its width is 3.4m, its height 3.85m and its chassis length 9.4m. The transport weight is 48t without ballast, but with the folding jib and hook block. This can be reduced further to 44.8t. All of Liebherr’s rough terrain cranes comply with a global, uniform safety standard and thus with globally valid regulations such as the US ASME B30.5 standard, the European EN 13000 standard, the Australian Standards (AS) and the Russian GOST standard. Safety features on this crane include automatic monitoring of whether the crane is working on outriggers or on tyres. Combined with the company’s VarioBase stepless outrigger system, this allows the crane to work to its maximum available safe capacity, however it is set up.
In Munich, as Liebherr showed
off the prototype of this new 130t crane, Manitowoc — which is not taking part in ConExpo — launched its upgraded 100t model: the GRT8100-1. Like the Liebherr, this crane also brings in new flexibility in crane set up. The new crane makes use of Manitowoc’s MAXbase system, adding the ability to work from variably positioned outriggers. Much of the design of the
two-axle, 100t, 47m main boom machine is taken from its bigger counterpart: the 120t GRT8120. The cranes share a similar chassis. The new machine also updates the engine and transmission of its predecessor, improving fuel efficiency and so reducing both cost and emissions. “The GRT8100 has been a popular choice with customers worldwide. With the GRT8100- 1, we have taken a great crane and made it even better,” said Federico Lovera, product manager for rough-terrain, industrial, and lattice boom crawler cranes
The striking boom geometry of the Tadano ‘Pythagoras’ is key to the success of Yokahama housing specialist Nakako
at Manitowoc. “The new Grove GRT8100-1 will go into production at our U.S. and Italian factories simultaneously, allowing deliveries to customers around the world to begin in early Q2 next year.”
INTERNATIONAL AND DIVERSE But not every new crane is in this 90–130t high capacity class. Rough terrains are used around the world often on jobs that require much
less lifting power, such as general construction. These machines are also often used on long term contracts in sites, like refineries, where their off-road mobility and pick and carry capacities makes them ideal for ongoing maintenance. Tadano’s latest entry in its
CREVO, or Crane Evolution, series is aimed solely at its local, Japanese, domestic market.
f CRANES TODAY 37
Tadano has a theory
Japan has always had its own traditions of rough terrain design. The country’s roadable RTs form the design basis for compact city cranes, often seen as a specialist type of all terrain and frequently used on indoor or highly congested sites around the world. In recent years Tadano has taken an approach to working in congested sites not seen elsewhere in the world. It has given its GR-130F-1 the nickname ‘Pythagoras’, after the Greek philosopher familiar to generations of schoolchildren for his theorem on right angle triangles. The reason for the name is apparent from a glance at the crane’s lifting geometry: as well as its 15m main boom, it features a 15.9 metre telescoping jib, which can be positioned at any between -3° and 82°. On housebuilding job sites, the crane can be used to carry loads horizontally over fi ve-storey obstacles. That use had prompted Yokohama residential construction specialist Nakako to buy eleven of the machines, by the end of 2021. The roadable RT offers a compelling alternative to tower cranes on many of its sites. “Pythagoras is our strategy,” says Nakako founder and president Noriaki
Nakamura. “Construction of low-rise houses with two to fi ve fl oors in some Japanese metropolitan areas cannot be done without Pythagoras because there are many obstacles such as electric wires and highly restricted construction conditions. It can be even said that there is no site that cannot be built with Pythagoras.”
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