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You know, I guess what I was trying to get across was this: Randy probably doesn't have anything to compact the subgrade with, apart from his feet. He can rent equipment to do the job, but that costs money and requires a pickup truck to haul it in, which he may not own. He lives in a wet climate. His soil type is unknown to me. Rebar is cheap insurance.
Given the aggravation of mixing umpteen bags of "instant concrete" in a wheelbarrow with a shovel (he has no mixer, I assume) and knowing how long it will take, I'm concerned that he'll be able to mix it, place it and finish it before it gets out of hand. Maybe he has thirty kids that can help, I don't know. Me, I'd pick up the phone and order it. Maybe he could use up the rest of his minimum order on a sidewalk, tool shed slab, or whatever else he may want to add to his house, now or in the future.
Some things aren't worth doing to save a buck. Mixing a bunch of concrete by hand is one of them, at least for me.
JR
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