Liebherr’s new highreach boom fitted for turbine work


Franz Bracht is expanding the capacities and wind turbine installation capability of its Erwitte, Germany, based fleet with a 750t lattice boom truck crane and innovative SL12D2FB boom.

The 750t LG 1750’s is now the biggest capacity mover in its fleet of ten lattice boom mobile cranes.

A week after delivery, the crane was used at Gelsenkirchen to moving 370t coils and cables for an offshore vessel, working at a radius of 20m. For this job, the crane was configured with a 42m main boom, 31.5m derrick boom, 220t superstructure ballast, and 280t suspended ballast.

For future lifts, Franz Bracht will be using the new 750t lattice boom mobile crane mainly for the erection of wind power installations.

For these jobs, Bracht will be making use of the LG 1750’s new SL12D2FB boom system, which gives the lattice boom truck crane the extra reach needed for new, large wind power systems with tower heights ranging from 140m to 150m.
The new boom offers both increased load capacity and height under hook, Liebherr says. It is designed using stronger and longer components in the boom and jib. Like its predecessor SL9D2FB boom, the new SL12D2FB boom is a main boom arrangement with fixed jib and derrick system.

The stronger 12m lattice pieces, three in total, have a width of 3.5m instead of 3.0m in the lower area of the main boom, and the fixed jib is longer.

The system’s high reaching and heavylift capabilities mean it can lift 141t at under hook heights of 14m, and 97t up to 160m.

Franz Bracht uses a 92t, eight-axle Goldhofer low-loader to transport components of bigger crawler cranes, like the slewing superstructure of the LG 1750.

Franz Bracht’s Dirk Bracht, a managing partner, explains the company’s decision: “As well as its enormous load capacity, the LG 1750 is also extremely flexible.

“It can go into action rapidly and economically, because the basic unit can travel by itself on public roads. Fewer transport vehicles are needed in comparison with a crawler crane, and set-up time is shorter too.”

“It’s the perfect machine for heavy loads and short-time operations – set up, one lift, take down, and off again. Even with a crane as big as this, it’s often that simple.”

The Bracht Group has 200 cranes ranging from 7t to 1200t load capacity 14 of which are lattice boom crawler cranes. Including the other businesses in its lifting and moving group, German lifting companies Hofmann and Wilden, Bracht Group’s 500 staff operates 750 vehicle units.

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