Originally Posted by
gixer_1000
make sure and get the DPM below the concrete, i would also advise you put in 8mm reinforcing mesh.
Iv 5 inches of concrete in mine, with 2 of them 3x5meter steal grid mesh jobys.
More then enough, my drive is only 4 inch with no steal, and the 20 tonne lorry delivered the concrete by driving over that, and that was fine,