Posted 1/11/2012 00:36 (#2154889 - in reply to #2154854) Subject: Re: Full concrete slab for a machine shed?
I would definitely go concrete if I was spending the money on that big of a building anyway, but save yourself about $7k and go with 6" instead of 8. No reason why 6" 4k psi with a good grid of rebar won't do the job. I wouldn't be scared to run loaded semis on it.