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14.81 yds
27 cubic feet = 1 cubic yard4 inches = 1/3 footVolume = 2,400 x 1/3 = 800 cubic feet = 29.63cubic yards
2400 sq. ft. Divided by 3 (1/3 ft thick) = 800 cu ft 800 / 27 (27 cu ft per cu yd) = 29.63 cu yds Order 31 to 33 yds depending on how accurate your 4" are. Dan
A cubic yard of stone that is 4" thick would cover 9 square yards or 81 square feet. If you need to cover 7000 sq. ft., you would need roughly 86.5 cubic yards. That's a lot of rock.
Short Answer: About 50 lbs per foot square by 4" slab Detailed Calculation: A number of references online give the density of concrete as 2400 Kg/m^3 which is about the density of solid limestone often used as the agregate in concrete. Given that there are exactly 2.20462262 lbs per kilogram and 39.3700787 inches per meter that works out to about 0.0867 lbs per cubic inch. Assuming you meant a 12" by 12" by 4" slab that is 576 cubic inches times .0867 which works out to 49.94 lbs per 12" x 12" x 4" slab So in the future it should be easy to remember that a square foot of concrete that is four inches thick weighs about 50 pounds. Keep in mind that different types of concrete may vary in density depending on the type of cement used, amount of water, type and size of aggregate mixed in how much sand etc. Fortunately most type of stone and sand used for concrete are pretty close in density and the excess water in the mix will evaporate. So 50 pounds per square foot 4" deep is probably a good estimate in most cases as long as there isn't a lot of steel reinforcing bar or wire embedded in the concrete. Steel is about three times as dense as stone.
14.81 yds
27 cubic feet = 1 cubic yard4 inches = 1/3 footVolume = 2,400 x 1/3 = 800 cubic feet = 29.63cubic yards
2400 sq. ft. Divided by 3 (1/3 ft thick) = 800 cu ft 800 / 27 (27 cu ft per cu yd) = 29.63 cu yds Order 31 to 33 yds depending on how accurate your 4" are. Dan
200(square feet)x12(inches in a foot)=2400(inches)8(inches)x8(inches)=64(inches)2400(inches)÷64(inches)=37.5(pavers)37.5 pavers (if you need whole pavers, 37)
2400 in = 200 ft
Assuming you use the standard depth of four inches, you'll need a minimum of 29.63 cubic yards.
There are 1000 kg in a metric ton. As such 1m3 of concrete of density 2400 kg/m3 has a mass of 2.4 metric tons.
The mass of a cubic metre of concrete is 2250-2400 kilograms.
Concrete has a density of approx. 2400 kg/m3 . A cube of concrete 150mm3 is 0.15m3.As such it's mass is 2400 x 0.15 = 360 kg.It's weight is 360 x 9.81 = 3531.6 Newtons.
2400 sq. in. = 15483.84 sq. cm.
there is 12 inches in 1 foot, and there is two hundred (200) feet. so: 12X200= 2400 inches in 200 feet. the ratio is: 200 feet: 2400 inches.
A cubic yard of stone that is 4" thick would cover 9 square yards or 81 square feet. If you need to cover 7000 sq. ft., you would need roughly 86.5 cubic yards. That's a lot of rock.