A Liebherr LTR 1060 telescopic crawler crane of Wallis-based crane operator Clausen Kran AG has proven its qualities in the Gravel tracks of Alps mountain ranges with tight bends and steep slopes and gradients of up to 40 per cent that had to be overcome on the 920 m route with an ascent of 180 m. The overall centre of gravity of the machine was calculated to ensure that it would not tip over and would remain manoeuvrable when travelling around the bends and up the gradients. The results showed that the LTR 1060 would be able to travel along the route without ballast at a gross weight of 38 tonne and the boom at an angle of 20o. In addition, the hook block had to be secured to prevent it swinging.