I have a customer that has purchased and installed a 20-ton hydraulic boom crane at the side of a wharf. It was a good deal as it came from an equipment auction.
The wharf is on wooden pilings and it is only rated for 10 tons.
To top it off, the hydraulic requirements put us into a 25-30hp power pack. Hmmm... that's expensive eh? So is the 300' of cable to get to get to the nearest 3 phase supply.
What do I tell these people? Is there some magical way to load-limit the crane?