1 A retired Regular officer who also is employed by the federal government and is subject to the dual compensation statutes may have that reduction reduced because of the waiver of retired pay to receive VA benefits.
If they don't, then 4 thick is usually standard for a patio slab, how large or small it is doesn't really matter. The most important part is the sub-base. Make sure you have a good gravel base. I would recommend at least 12 inches of compacted gravel. I like gravel where the aggregate (rocks) are no larger than 1.
Answer. Your slab must be at least 4 thick. It can be thicker and should be thicker depending on the use of your building and slab. For instance if you are working on large heavy equipment a thicker slab and high concrete strength would be more suitable.And likewise, a storage building or studio would only need a 4 thick 2,500 psi foundation. We have published a Foundation Slab Thickness Chart for your use.t can be thicker and should be thicker depending on the use of your building and slab. For instance if you are working on large heavy equipment a thicker slab and high concrete strength would be more suitable.