Not to rob the trend but, (along same lines)
2 winters back we had enough snow that a fair number of roofs collapsed.
Insurance firms advised commercial clients that they were resposible for remouval of snow.
My buddy has a public storage facility, 10 buildings 100 ft long, the all metal type with low slope metal roofing.
Because of the panic situation shovelers were getting $40./hr and that would have cost him a bundle.(some were quoting $4-5000)
He hired a large excavator that simply drove up the lanes between the storage buildings and simply dragged the snow load down the roof without causing a single bit of damage!
The operator did not even remouve the teeth.
But then there are operators and real artisans.
Job got done in about 5 hrs