I have a kinda tight squeeze between septic/field line area and cant have a bunch of overflow dirt for build up,so I had a guy do what he could with just taking dirt from the high and putting to the low to get a start.I'm gonna have the bottom formed and fill the middle,then pour (what they call a turndown style pour-will create a "v" shape at the outer wall being about 8 inches thick at ground and prob 16 inches or more at the floor surface)doing it this way will be more concrete,but having a sloped backyard and tight area this is what I come up with.I've got a little room for overflow of fill but not much,may fill outside building a little,just to keep from needing so much concrete.
