Bobad I had the same idea as to how I plan to keep my dock from suffering ice damage someday. I would be turning the air pumps on today matter of fact, the ice is creaking and groaning hard today with a steady warm up predicted over the weekend. I will probably be ice free next week some time. When it goes off it can wreak havoc on anything sticking up thru it.
RobA I would say the weight of the entire dock would be more of a burden than the concrete alone. It would all settle to some extent unless you drove pilings.
