Concrete Question - Updated! Now With Pics!

[olds]

How many 60lb bags of concrete are needed to pour a slab 2' X 2' X 3.5"?

 

[GooberPHX420]

about 30 if my memory serves me right...

 

[MacBaine]

1...maybe 2? Not sure how much the concrete weighs exactly...but DON'T GET IT ON YOUR SKIN

 

[FoBoT]

click me grasshopper and ye shall learn the ways of the concrete slab

ok, that only gives it to you in cubic yards, hmmm, guess you still have to convert from cubic yards to 60 lb bags, hmmmmm

i think you need to check the bag, it might depend on the mix you are buying to determine the X pound bag to X cubic yards ratio

i found a place with a 40 pound bag that says


<< Each 40-pound bag produces 1/3 cu. ft. >>



oh, yeah, you are right,


<< Each 60 pound bag makes about
1/2 of a cubic foot of concrete. >>



so just convert cubic yards to cubic ft or vice versa and there you go, easy as pie

 

[olds]

<< click me grasshopper and ye shall learn the ways of the concrete slab

ok, that only gives it to you in cubic yards, hmmm, guess you still have to convert from cubic yards to 60 lb bags, hmmmmm >>


Ya that is where my problem is. They all convert to cu yd, the bag does .5 cu ft

30 bags, LOL

 

[eplebnista]

You might try this Quikrete Bag Calculator.

 

[Cyberian]

<< Ya that is where my problem is. They all convert to cu yd, the bag does .5 cu ft >>


24x24x3.5 = 2016 cu. in.
1 cu. ft. = 1728 cu. in.
2016/1728 = 1.166 cu. ft.
One 60 lb. bag = 0.5 cu. ft.

You need a little over 2 bags.

Check my math, I've been out of school 40+ years.

 

[olds]

<< You might try this Quikrete Bag Calculator. >>


That's a great calculator for these small jobs, thanks.

Cyberian
I have 3 bags, so that will work out perfectly.

Thanks all.

 

[cavingjan]

Regular concrete weighs approximately 140-160 lb/cubic ft.

Your typical bag concrete like quickcrete, sackcrete, etc weight signicantly less since you only get coarse aggregate of 3/8 or less. The quick calculators linked to already provide great info for these types of do it yourself concretes.

cubic yards is the units for rotating drum trucks in the US. just multiply by 27 to get cubic feet.

 

[olds]

Thanks for the input. Since I know everyone is dying for an update:
It took exactly 3 bags and the final dimensions ended up being 2' X 2' X 4.5"
It's for a fountian and that fountian isn't going anywhere.
Framing

Finished

 

[MadRat]

WTH, you expect it to handle the weight of birds with no rebar added in for support!?!

 

[Dedpuhl]

<< WTH, you expect it to handle the weight of birds with no rebar added in for support!?! >>



I was thinking the same thing. He should have gone with AT THE LEAST 8 #4 bars....

 

[olds]

<<

<< WTH, you expect it to handle the weight of birds with no rebar added in for support!?! >>



I was thinking the same thing. He should have gone with AT THE LEAST 8 #4 bars....

>>


LOL, this thing is heavy I can't pick up the bottom bowl by myself and I am a big boy.
Fountain The only difference is ours has a pedestal base instead of the legs.