Well, there more then one frost line in Illinois: 1) 10" to 20" for Southern Illinois
2) 15" to 30" for Central Illinois (frost line for Peoria)
3) 20" to 35" for Northern Illinois
The frost line in Chicago depends on the average temperature in winter over a period of time. The winter of 2013 - 2014 was especially cold and the frost line reached a depth of 15 feet in some areas of Chicago. The average frost line in Chicago is about 7 feet per winter.
The frost line refers to how deeply frost is able to penetrate into the ground. In Colorado, the frost line is around 14 inches into the soil.
Your local building council should have that. You can call them and ask how deep does the footings have to be - which will actually be below the frost line.
The frost line in Wisconsin is different in different parts of the state. In northern Wisconsin, the frost line is 40 inches. In southern Wisconsin the frost line is 48 inches.
From 50 - 90 inches depending on how far north you are
42 inches
no Frost
It is recommended that footings in the Wisconsin area be 48" for most buildings. This is because of the deep frost that can occur in harsh Wisconsin winters.
no Frost
It depends on where you live and is associated with latitude. The further you go north or south of the equator, the deeper the frost line tends top be.
frost line in pa is 42 inches
24in
one metre
42 inches
42"
3ft
What is the frost line depth in louisville Kentucky
They are located below the frost line