I think there was a small glacier when the lift was build 1982. So they didn't have a choice and suspended the mast. I suppose when the glacier melt away they l

I think there was a small glacier when the lift was build 1982. So they didn't have a choice and suspended the mast. I suppose when the glacier melt away they lowered the mast. It's not the only skilift with suspended masts. I know of a skilift in Verbier with suspended masts. And how to architect it: you need steep rock walls not farther than about 300 meters (not sure here, just from what I've seen). Then «just» hang the mast from ropes attached to the rock walls. I am sure that the word «just» is wrong here as this needs complicated engineering and as in the mountains the weather is harsh you'll need solid and antifragile solutions, as well.