I live in Fairfax, VT, zip is 05454. I'm building a deck, and I'm going to be pouring concrete into sonotubes. Everything I've read states that the bottom of the sonotube must be below the frost line. Nowhere does it state how deep that might be. I assume that the USDA or the department of the Interior must have a map on this kinda thing, but for the life of me, I can't find it. Any ideas?
- posted
18 years ago