The frost depth is NOT 42". It is at least 8 feet and can approach 10 feet or more depending on the conditions (snow cover, soil properties, etc). Footing are required to be 48" deep with the addition of horizontal and vertical insulation if at a walkout, if the slab is at the bottom of the footing then no insulation is required.
The frost depth refers to how deeply frost can penetrate into the ground. In Martinsville, Virginia, the frost depth is around 18 inches deep.
frost depth in eastern ohio
The frost depth level below area's usually not less than 800 mm .
There is no one set "frost depth". It will depend on where in the state, the elevation, local weather, etc.
The frost line depth for Cheyenne, Wyoming is 36" for foundation.
What is the frost line depth in louisville Kentucky
The frost depth in New Jersey typically ranges from 0 to 36 inches, depending on the specific location and winter conditions. This depth represents how deeply the ground freezes during the winter season. It is important to consider frost depth when planning construction projects or installing underground utilities to prevent damage from frost heave.
18"
The frost line depth for the Ottawa-Montreal area ranges from 1.4m to 1.5m below surface elevation.
Frost line depth is measured from grade (or lowest surface soil level pursuant to the foundation).
looks like 5 inches is the frost depth in jackson, MS. See: http://www.decks.com/deckbuilding/Deck_Footing_Frost_Depth_Map
Based on construction guidelines for a garage, the minimum depth of a below frost foundation is 3'11". That is the city of Oshawa guidelines.