Working on a new resi build at the moment. The basement walls have been prebuilt and are setting on a crush/run gravel base. I placed a 5/8" grnd rod under the walls so that we could tie into the rebar. Come to find out, they wont be using any rebar, it will be fiber reinforced concrete. Should I just span a 20 ft piece of #4 copper or do you have any other suggestions. Thanks