FOUNDATION – a structural foundation is required in order to support the weight of these units. This consists of a 6" thick reiforced concrete pad which is supported on 8" Dia. Sono Tubes (24" OC.) .going down to the frost line or lower. The Sono Tuvbes must be on stable and undisturbed subsoil footing. Consult a qualified concrete mason for detailed information on foundation requirements.
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