Re: foundation depth confusion
In cold climates with significant frost depth the ground can heave several inches especialy if you go into winter with saturated soil. Your floating slab will raise but will be straight up if site prep was good and slab reinforced. Your oven will never feel any stress. If you are against another structure such as the back of your house you have more to worry about as the temperature until slab and thus the frost heave will not be consistant. If that is your situation a foundation below the frost line becomes important. The slab should be pinned to existing structure and pinned to foundation with rebar. The frost will not be able to pull the foundation up from four feet of ground. Again, post footings will save you much excavating and concrete.
A post hole digger will get the job done if you don't hit rock. Don't forget to call diggers hot line to mark utilities.
In cold climates with significant frost depth the ground can heave several inches especialy if you go into winter with saturated soil. Your floating slab will raise but will be straight up if site prep was good and slab reinforced. Your oven will never feel any stress. If you are against another structure such as the back of your house you have more to worry about as the temperature until slab and thus the frost heave will not be consistant. If that is your situation a foundation below the frost line becomes important. The slab should be pinned to existing structure and pinned to foundation with rebar. The frost will not be able to pull the foundation up from four feet of ground. Again, post footings will save you much excavating and concrete.
A post hole digger will get the job done if you don't hit rock. Don't forget to call diggers hot line to mark utilities.
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