Mammoet orders pair of 1,000 tonne telescopics

25 April 2008

Mammoet will expand its crane fleet with two new 1,000 tonne capacity wheeled mobile telescopic cranes from Liebherr. According to a Mammoet official the cranes will be the new LTM 11000-9.1 announced in IC last November. One crane will be operated from the Dutch headquarters, while the other one will be stationed in Germany. The cranes will start operating in late 2007.

The LTM 11000-9.1 has a nine axle all terrain carrier with X-type outriggers that give a maximum outrigger base of 13 x 13 m. The outriggers remain on the carrier during transport so the crane complies with Dutch and European road regulations that have a maximum gross vehicle weight limit of 100 tonnes – a basic requirement in line with current and more stringent regulations, according to Mammoet. The 54.4 m telescopic boom will be transported separately on a tractor and dolly combination.

An assist crane is not needed to install the telescopic boom as the crane can do it by itself, Mammoet said. If required, the boom can be stowed over the front of the carrier for travel on site. To install the counterweight a base plate on the ground is stacked with all the pieces before a special lifting device, fitted to the rear on the crane upper works, lifts the full 200 tonne package onto the crane. This method almost eliminates the work at height associated with counterweight installation on large capacity telescopic cranes.

Mammoet opted for the 54.4 m telescopic boom in combination with the Y-guying system, a 6 m adaptor and 126 m of luffing jib. This combination also allows, the installation of, among others, 72 m of fixed jib to reach a tip height of 135 m. This height used to be the domain of luffing jibs. The main telescopic boom will be prepared for the fitting of a second telescopic boom, extending tip height to 100 m but this configuration will only become available if market circumstances require it, according to Mammoet.

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