How to make the concrete cushion at the bottom of the ground the strongest? I use soil and compact it with a tractor. It's cold in the northeast, and it won't take long.

Answer: After the concrete is landed, it must be compacted by tractor. Then, 8 cm thick ribbed steel bars are laid, bound into the shape of 17-20 cm cross net, and then concrete is laid to make it more firm. Answer: After the concrete is landed, it must be compacted by tractor. Then, 8 cm thick ribbed steel bars are laid, bound into the shape of 17-20 cm cross net, and then concrete is laid to make it more firm. Answer: After the concrete is landed, it must be compacted by tractor. Then, 8 cm thick ribbed steel bars are laid, bound into the shape of 17-20 cm cross net, and then concrete is laid to make it more firm.