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Floating Slabs for Unheated Buildings by Fredrick E. Crory frost action. During the past year, I've had several One sure way to protect a structure inquiries about designing foundations from frost heaving is to elevate it on for unheated or partially heated build- piers or piles. But this is not always ings in northern New England. One was practical, particularly for garages, workfor an unheated, three-car garage, shops, and other buildings that carry another was for a small cottage that was motor vehicles, machinery, or other to be heated only occasionally, and a heavy loads. Slab-on-grade foundathird was for a warehouse that was to be tions, on the other hand, are