In order to reach the site, the crane and 15 transportation trucks had to be driven on uphill slopes of up to 18.5% and numerous narrow passageways.
“Entire paths and setup areas had to be literally hewn out of solid rock and, in certain cases, cleared by means of explosives in advance,” Terex said.
Four assembly technicians set up the crane in two days. The crane was set up with an outrigger area of 14 x 14m and a counterweight of 200t on the superstructure.
For the boom, the Welti-Furrer specialists chose an SH/LH SGL_S7 configuration with a 90m main boom. In addition, they mounted a lightweight, rigid LF-2 jib, which contributed an additional 12m to the total height. This resulted in an available boom length of 102m– enough to erect the wind turbines’ 84m-tall tubular steel towers and easily lift all components – with a maximum weight of 64t – while working at radii between 22 and 25m.
Welti-Furrer project manager Werner Häfliger said about the company’s crane choice: “On one hand, the TC 2800-1 is extremely maneuverable. On the other, it features extraordinary gradeability. These are two indispensable prerequisites for working in high mountain areas, and they’re exactly the reason why this crane is our preferred machine when it comes to this type of high-altitude project.”
