I am pouring a concrete slab that is on a slight slope, it falls 1' in about 5'. What size should my footing
Answers:
I am not a contactor, home owner, renter, or person who bathes regular, so I am just going to take a guess off of the top of my head and say.... about the same as your shoe size?
Other answers:
BE SURE TO PUT THE DEAD BODY IN FIRST AND THEN POUR THE ACID.
BE SURE TO PUT THE DEAD BODY IN FIRST AND THEN POUR THE ACID.
a foot every 5 feet? Slight slope?
You should pour your footers 36" for a house. If your barn isn't to large, you could get away with 24".
You should make your footing about 6 - 12 inches below the frost line in your area.
it depends on your area you live in. Your footing should be below the freeze and thaw line. Here in the mid west it should be 36 inches. but Texas say where it dose not freeze as often might be 18 to 24 inches, Minnesota might be 4 feet.
OK.....Pay attention because all of the answers I read were written by idiots. Footings for homes/garages are ALWAYS 2 feet wide by 1 foot thick (at their thinnest point). Since you're on a slope, the thinnest part of the footing will be 1 foot thick and of course thicker on the down slope so you can maintain level. Make sure the footing is below the frost line. I live in NJ, so our frost line is 3 feet. Therefore, in my area I would pour the footing at around 4 feet down.
It sounds like you are intension is for this to be a floating slab, the footings for a floating slab don't need to be below the frost line. Generally if you build up the perimeter of your slab (underneath) about 16"-18" deep and about 24" wide with a 4" slab it should be plenty to hold the weight of a garage and cars. Make sure you re-bar throughout the footings and the entire slab. Also remember if you slope your slab you will need to taper your walls in order to level your top plate. Generally a floating slab is poured perfectly level. The walls are either set directly on the slab or a course of block is layed around the perimeter. Site preperation is very important since your footings won't be below the frost line. Make sure everything is solid and tamped good before you poor. If you intend to heat the structure there are methods of insulating around the footings below ground that should be done.
Form up your foundation and floor so you have about 1" drop on 10'
Which means you will raise the back end of the form up 1" for each 10' of run. if your slab is 20' you'd have 2" of rise.