How to Minimize Frost Heave
What's the best way to minimize frost heave and any cracking in the following situation:
I'm building a shed on a 9' x 10' concrete slab foundation. The frost line here is about 3'6" below grade, but I don't really want to dig that far down.
The "footing" will only be about a foot deep and the slab will be 4" thick. The entire foundation will be poured over 4" of gravel. I've included a picture that shows more or less what I'm planning.
Does anyone have any good ideas?