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.
1 Dig out the patio to the depth of 5-7â³. A total of 4â³ for the concrete and 1-3â³ for the gravel (the depth of gravel depends on the type of soil that the patio will be on). Ours was a total of about 5-6â³ because our soil was so hard to begin with.  Donât over dig. Dig out only what you have too.