Yeah that's if it's not poured yet. Just saw cut where the feet will go. A 16"x16" is plenty. Go at least a foot deep. A lot depends on soil conditions. If it's clay like materials go bigger on the footings. If you have good soils like decomposed granite or some other brutal soil you should be fine with a 16"-18" pier footing. A simple rebar grid in the bottom of the footing. 1/2" 60grade minimum. The grid should look like a box. So if you go 18"x18" footing you would cut you rebar in to 12" pieces. You want 3" clearance from soils on all your steel. Also don't pour you concrete too wet as it drastically reduces strength. Let it cure for a good 2 weeks before drilling anchors in to it. Home Depot sells anchors called red heads. They come in 1/2" to 5/8" I would go 5/8" and just follow the directions. We support a lot of weight with those anchors when we set silos for brewery's. Best of luck to ya. You can possibly ask a concrete guy from your area also. Maybe he has a different idea, also it can give you an idea of material cost involved.

Last edited by Hollow65; 01/08/2014 1:19 PM.
I can explain it to you, I can't understand it for you.