2006-10-18 07:46:54 · 8 answers · asked by Tim A 1 in Science & Mathematics ➔ Engineering
You do the calculation.
You measure the area in consistent units. You measure the height. Area times Height = Volume. You calculate the volume in such units.
Concrete is measured in cubic yards. You convert the volume to cubic yards.
For instance. A pad 4" thick, by 9' wide by 9' long. The volume in measured units (convert all units to foot) is 0.33' * 9' * 9' = 27 cubic feet
LEARN THIS !!!!
ANYTHING DIVIDED BY ITSELF IS 1(ONE)
1/1 = 1
3.14/3.14 = 1
12 INCHES/1 FOOT = 1
60 SECONDS/ 1 MINUTE = 1
27 FOOT CUBED/ 1 YARD CUBED = 1
What is 3' x 3' x 3'? = 27 cubic feet? 3x3x3=27(numerical magnitude) (')^3 (dimensional analysis) = 3 foot x 3 foot x 3 foot = 27 cubic foot = 27 (ft)^3
3 foot x 3 foot x 3 foot = 1 yd x 1 yd x 1yd
27 cubic feet = 1 cubic yard. ORDER 1 CUBIC YARD OF CONCRETE FOR A 9' x 9' x 4" SLAB.
2006-10-18 19:59:42 · answer #1 · answered by daedgewood 4 · 0⤊ 0⤋
First find the square feet of the area. This is done by multiplying the width x the length. Example 20'x60' = 1200 sq. feet. Now you need to calculate how thick the concrete will be and convert that to decimals. Slabs are usually 4" thick, which is 1/3 of a foot or .33 inches in decimals. Now take the square feet (1200) x .33 to get cubic feet. This equals 396 cubic feet. Concrete is sold by the cubic yard. A cubic yard is a 3' square cube. It's like stacking up 1 sq foot blocks to form a 3'x3' cube. There are 27 of these 1' cubes in this cubic yard. So to find cubic yards you must divide the total cubic feet in your equation (396) by 27. This equals 14.66 cubic yards. Going back to decimals - to calculate inches to decimals just remember you divide 100 by 12 because there are 12" in 1 foot. 100 divided by 12 is 8.33. So 1" in decimals = 8.33. Now just multiply 8.33 x however many inches your concrete will be. I don't know if you are actually going to pour some concrete, or you just need to know how to estimate the concrete needed. If you are pouring concrete just remember each truck only holds about 9-10 cubic yards. If you need more than that I suggest you pour out the first truck, then call in to the concrete plant or tell the driver of the first truck,exactly how much you need to finish the pour. Irregular ground can increase or decrease the actual depth of the pour which in turn will cause you to over or under estimate the concrete needed. Just think of a cubic yard as a big Rubik's cube, with 3 sections on each side and 3 sections thick. Each of these little cubes in the big cube equals 1 sq. foot. Good Luck.
2016-05-22 00:00:02 · answer #2 · answered by ? 4 · 0⤊ 0⤋
it dependes on the square footage .... say for instance a side walk is 4' by 20' at 4" deep thats 4 times 20 = 80 and that is equal to 1 cubic yard of concrete. you can easily find out the different calculations on a slide ruler almost every concrete plant in the usa gives them away free or you could go to the rinker web site and they will calculate it for you all you need is the measurements
2006-10-18 08:31:04 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Calculate the volume of the space you want to fill by multiplying the length times the width times the height (LxWxH=volume).
Convert that answer into cubic yards. (27 cubic ft. = 1 cubic yard)
2006-10-18 07:50:53 · answer #4 · answered by Michael 5 · 1⤊ 0⤋
length times width (in feet), for a 4" slab divide by 81, for a 6" slab divide by 62
2006-10-18 07:48:54 · answer #5 · answered by Ralph 5 · 0⤊ 0⤋
length X width X thickness (in feet) divided by 27.
2006-10-18 07:56:30 · answer #6 · answered by salter 2 · 0⤊ 0⤋
WxLxD/3
2006-10-18 07:48:39 · answer #7 · answered by Anonymous · 0⤊ 0⤋
You all need to figure out how to explain things, Not one of you make any sense at all.
2015-07-02 02:59:19 · answer #8 · answered by Turbo 1 · 0⤊ 0⤋