NEED 2 FIGURE OUT HOW MANY CUBIC YARD OF CONCRETE ARE NEEDED 4 A SLAB 4 1/2 INCHES THICK PLUS ONE 18 INCH FITTING.PAD IS ROUGHLY 25X20. LENGTHXWIDTHXDEPTHX??????????
2006-08-28 14:50:15 · 0 answers · asked by shannonlee05@sbcglobal.net 6 in Science & Mathematics ➔ Engineering
i meant footing not fitting 18in deepx8 inches widex25 ft. long
2006-08-28 15:10:35 · update #1
yes, length times width times depth
if you get all the measurments in feet
25 x 20 x 4.5/12 = 187.5 ft^3
there are 27 ft^3 in a cubic yard, so 187.5/27 = 6.94 cub yrds
so, about 7 cubic yards for a 25 ft x 25 ft x 4.5 inch pad
I don't know what you are talking about with the 18-inch fitting
order an extra yard and you should be covered
the delivery costs about as much as the concrete so an incremental yard is usually not expensive
2006-08-28 14:56:14 · answer #1 · answered by enginerd 6 · 0⤊ 0⤋
RE:
formula for figuring cubic yards of concrete?
NEED 2 FIGURE OUT HOW MANY CUBIC YARD OF CONCRETE ARE NEEDED 4 A SLAB 4 1/2 INCHES THICK PLUS ONE 18 INCH FITTING.PAD IS ROUGHLY 25X20. LENGTHXWIDTHXDEPTHX??????????
2015-08-02 02:01:10 · answer #2 · answered by Anonymous · 0⤊ 0⤋
25X20=500 square feet, times 1/3=167cu.feet/27=~6-6.5 cu.yards. I'd order 7.5 or 8 yards just to be safe. Are you sure it's not 3 1/2 inches, a standard two by four?
2006-08-28 14:58:29 · answer #3 · answered by Sciencenut 7 · 0⤊ 0⤋
25' x 20' = 500 sq ft.
500 x 144 = 72000 sq inches
72000 x 4.5 = 324000 cubic inches
324000 / 46656 = 6.944 cu yards
you still need to add for the fitting pad but another ½ yard should suffice nicely.
2006-08-28 14:59:47 · answer #4 · answered by h2odog 3 · 0⤊ 0⤋
How To Figure Concrete
2016-10-30 21:52:41 · answer #5 · answered by ? 4 · 0⤊ 0⤋