Thanks for the reply Glenn. After the basement was dug out. they dumped #1 limestone in and when superior walls got there, they packed down the gravel where the walls sit. The rest of the gravel was not packed at all. There was no vapor barrier or wire mesh laid down. The cement was poured on top of the loose gravel. The cement subcontractor did say the floor is 6" thick. There was no cover or chemical curing compound put on either. I did have the rep from Superior Walls come down and he claims the cracks are all normal. Too many shortcuts were taken on this basement. I have someone coming today to look at the problem and give me full details of what to do to fix it and how much it will cost. Then I have an appointment with my attorney. I have been told by others that this floor will need to come out and re-poured.