On a 'Frost Line Map' it is 10".
To get a more accurate reading call your local building inspector office.
7 inches. http://www.cloudynights.com/ubbthreads/attachments/2387257-FROST%20LINE%20MAP.doc
no Frost
no Frost
one metre
42 inches
42"
3ft
What is the frost line depth in louisville Kentucky
48"
the frost line is 36"
They are located below the frost line
32"