Brian- You make a good point in that if it's only the incremental cost of the 'crete', it's probably not the place to 'cheap-out'! In my structure at 28X40 the difference is about 7 cuyds, (13.83 cuyds, vs 20.74 cuyds). Figure what, $110.00 a yd, on the truck?While we are talking this, I would really like to know the cost of 4" and the difference per foot to 6".
Mjn- I understand the 'bars, and chairs', but think I'm about to face Rebar sticker-shock! I've found this site helpful, http://www.concretenetwork.com/ especially the calculator. Looks like I've got a lot of reading to do! Thanks Guys! ~Scotty