Frost line depth in Fairbanks North Star Borough, AK

How deep the ground freezes in Fairbanks North Star Borough, AK

101 in. Dig to 101 in, just below the frost. Nearest NOAA station: Eielson Fld, 17.9 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