TELECRAWLERS Ӏ SECTOR REPORT BOTH WORLDS BEST OF
The telescopic crawler marries the boom of a rough terrain with the base of a lattice boom crawler to create a sought-after lifting solution that navigates tricky terrain and provides great pick and carry capabilities. Julian Champkin reports on developments in the sector.
A rough terrain crane (RT) has a telescopic boom and is mounted on tyres. Its extendable boom makes it manoeuvrable and flexible. The rubber tyres, however, mean that the RT needs outriggers on site to give it stability and the tyres don’t cope well with extremely soft ground terrain.
A lattice crawler crane needs
no outriggers. It can pick its load and carry it. It can go more on less anywhere on a site – as long as there is space for it. But it is large and bulky. Low bridges can be a problem. And it cannot be transported to the site in one piece: the lattice boom usually travels separately and has to be mounted on-site, which takes both effort and time.
Kobelco’s
75-tonne TKE750G is well suited to foundation work
A telescopic boom crawler crane has the best of both worlds. With the boom contracted it takes up much less space so it doesn’t have to be detached for transport. That alone delivers huge savings in cost. The crane can set to work as soon as it arrives on site, so more savings there. It does not need outriggers for stability, so it can pick and carry as desired. The boom can be telescoped to give whatever radius the operator
desires to accurately deliver the load; a simple, easier, and less energy-consuming process than having to raise a lattice boom to a steep angle to lessen the radius. And the crawler gear really does enable it to be used on any terrain. So whichever bright spark thought of putting the boom of a RT on the chassis of a lattice crawler was on to a winner. The combination delvers a crane which is enormously flexible. Applications are more or less anywhere that construction takes place: in infrastructure; in energy; as auxiliaries cranes; even standing in for a tower crane, as the box on the next page shows. Manufacturers, therefore,
have been happy to provide them. Among the latest models Kobelco has a new telecrawler launched in January. The 75 tonne capacity TKE750G is aimed specifically
Kobelco’s TKE750G telescopic on its way to the Intermat show in Paris where it will be on display
26 CRANES TODAY
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