"Wpg Man" wrote:

Place bales in a series of solid 8ft x 8ft squares on the ground.
Between each set of 8ft squares would be an 8 inch gap. If you can
imagine, the concrete is poured over the while thing. The concrete
would go down into the 8" gaps, giving an integral concrete "beam"
every 8 feet. So instead of a "thickened" edge beam only, this pad
would have a matrix of beams every 8 feet. Of course there would be
rebar also.

How much rebar in the (20" deep?) beams and 8'x8' slab, if
it supports a 4,000 pound car? How thick would the slab be?

Nick