@bcworkz joins the 10k Club!

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gravel under concrete?

is it absolutely required?

are any of you builders?

so, I have a post-frame shed, 12x16. there are posts at 6' on the short sides and every 4' on the long side. posts are set ~18" below grade, on a 2" cap of cement over a few inches of well compacted gravel (holes were all about 27" or so, 2x6 girder runs level at the top (very level all the way around) around base,

so I want to fill that in with concrete, I could put gravel in, say 2" and 3.5" of concrete over that

or just full 5.5" of crete

so I want to fill that in with concrete, I could put gravel in, say 2" and 3.5" of concrete over that

anyway, point is, I think a 5.5" slab, which is on some spongy clay with probably be fine, since its a 12x16' shed. avoid the gravel, the trouble, the labor, time etc with putting a couple inches of gravel in a shed

then, pouring concrete on it

should I make a opic question for this?

ok I made a topic