alright, so with that lets say what about if the subsurface is not so stable how thick...5" is about normal driveway thickness. It depends a lot on how stable the subsurface is and what size mesh/rebar you use.
I would really appreciate it! Thank you. Im sure it varies but just a general idea would work perfect.I'm not a concrete expert but do own my own business in the construction field. One of my best friends who crews with us local is a structual engineer. I will shoot him an e-mail and find out. I don't want to give you bad info.