Frost Protection - Ag Structure
Frost Protection - Ag Structure
(OP)
Question concerning agricultural code requirments? I am designing a mat foundation(14'x24'x18" thick) (12" below grade) in Iowa supporting a grain bin and head house on a 10'x20' steel framed structure. Frost protection required depth is typically 42" in this area. The structure can tolarate movement from frost... Do I need to pour the entire mat 48" thick or thicken the edges to 48" and insulate below center area?





RE: Frost Protection - Ag Structure
RE: Frost Protection - Ag Structure
Dik
RE: Frost Protection - Ag Structure
RE: Frost Protection - Ag Structure
Keep in mind that this granular soil will naturally retain much less moisture than the silts or clays of Iowa. The more moisture, the lesser the "frost depth". You remember that high school physics class about heat of fusion?
Therefore, if they say frost depth is 42 inches, (assuming in their silts and clays), you would be wise to go deeper with an undercut that is backfilled with non-frost susceptible soil, compacted of course. 48 inches would be my least deth recommendation, butI have seen frozen ground in Wisconsin, in December, 8 feet below grade in clean sand.