Frost line depth in Iron County, UT

How deep the ground freezes in Iron County, UT

21 in. Dig to 22 in, just below the frost. Nearest NOAA station: Cedar City Muni Ap, 18.1 mi.

Your building department sets the legal frost line depth (IRC Table R301.2(1)); footings must go below it (R403.1.4.1). Call them before you dig.

Code depth · Method