I am getting ready to build my garage. Had a concrete guy come and give me a bid on the slab.He wants to put 2 ft. deep footers. He says I need to also put footers in a "x" pattern in the center of slab. Rebar on 12" centers. The garage will be 28x32. My problem is $8000. for the slab. Been awhile since I've messed with any thing like this but has concrete got this high? I think he's going a bit over board on the footers ("x" pattern in center). He also said about 4 1/2" thick. Is $8000. to much or am I just being the cheap guy that I am? I was thinking in the $5000. range.

 

on a 32 foot span you should have some extra footing under your slab, the X plan isn't that bad of an idea. i wouldn't put the footing 2 ft deep though, drill piles every 6 feet and run a 1 ft footing. definately run a thick slab, 4 1/2-5 inch. 8ooo.oo is a bit high, i'm thinking more around the 55oo.oo mark to be adequate. i think concrete is roughly 4o.oo a cubic yard right now...CAD...

 

I think I paid $2.50 a square foot finished. I have been trying to remember, but I think that's right.

Toyman

 

Your getting a good deal if you can get concrete for $40 a yard, In Ohio it is over $70 a yard

 

Concrete hasn't been $40 per yard in years. Cement has a high energy content, as does the fuel for the delivery trucks. A real "deal" is $80 per yard and it is pushing over $100 per yard some places.

 

my bid for my 30 X50 6" pour with no footers is 10,000.00

 

maybe i'm mistaken , could be wrong, wait, i was wrong. that $40.oo was per foot of poured footing. sorry for that...

 

This works out to $9.00 a sq. ft. With the footings he is doing and the rebar costs.??? From what you guys are saying maybe it isn't so far out of the ball park. I can't get any other concrete guys to even answer thier phone much less come give me a bid. Still it seems high by several $$$$$.

 

last fall I had 36x44 5" slab poured monolithic style w/2" high density foam insul. about 32 yards of concrete IIRC. 5/8" rebar spaced 12" apart. Footers were about 1 ft.x1 ft. the pex tubing was seperate, but it all cost about $8500. Because mine is heated, there's differences in footer depth, and such. One thing to note: using a pumper truck sure saves in time and manpower. My 2 cents.

 

hah, its 120 per yard here in so cal, but since i have an account, and am an ex-employee, i get it for 40 a yard........

 

yup. over $100 per yard here in jersey also

 

wow...sounds like it'd be cheaper for a guy to sink piles, and use i beam joists 12 inches center and double up your 3/4 inch subfloor...

are many of you guys putting in-floor-heating in it??

 

it's about $100 per yard 35mpa here cheaper if you got connections and i've done a lot of slabs for commercial garages and we have never put any cross footing in whats the heaviest thing you will have in your shop.

 

You shouldn't need the X footing if your rebar is 12" OC. I come up with about 12.5 yards for the slab alone(4.5" thick) and about 9 more for the footings(2'x1')(excluding the X) 2 foot deep footing may be overkill, expecially since you don't have frost to deal with, but it also depends on what type of soil the garage is being built on. Compacted sand or crushed rock(class5) would be ideal, clay or topsoil is not a good base. Even if the price includes everything(site prep, excavation, rebar, concrete, finishing) it seems a little high. A couple more estimates should give you a better idea of what it should cost.

 

Well now after getting this extra information I think I will go see about renting some equipment and doing this myself. I have been a helper for other friends but its been over 15 years ago. Think I can save about half maybe. That will help pay for some nice garage doors. What is the formula for figuring concrete? I told the guy I never heard of the x thing down the center either. I will only be working on my trucks and cars in thier so I don't see no need for it. Thanks for all the replys.