[tessiers]

I work for a large construction company (100 men) and we place probably 4 to 5 thousand yards per year. All concrete slabs over about 15 feet square crack. The steel keeps the cracks from opening and moving but they are still there. We use wire in most slabs although we do use rebar in some of the heavy use slabs. Cutting control joints where you want the cracks will help. We cut them into squares between 10 and 15 feet in each direction.