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2) There is no legal requirement applying to foundations but they recommend an 18-24” footer, minimum of 6” thick (8” preferred) that is built beneath the 18’ frostline. So, in other words, I’m digging a 26” deep trench, 18-24” wide. But my question is WHY . . . why is that recommended?
I do not think he has stated where he is building. Footing vary hugely, you lucky southern folks only have to think about little things. Up in the north we can have 60" plus which just hurts the wallet.
one of the threads on here had something similar, the guy who was building a vineyard it Texas made a studio, cant remember which thread it was