If my slab is 36"x 68"X 4" how much concrete will I need ?

Question

replacing small side walk with step

Answer 1

(3'*5.67'*.33")/27=.2 cubic yards

Answer 2

L x W/27

Answer 3

Concrete is ordered via the cubic backyard. i'm getting approximately 2.4 Cu. Yd.S. Order a minimum of two a million/2 Cu Yd.S , and have some provision for the extra. (that is greater effective to have too lots than too little and maximum projects can constantly use a mounting pad for in spite of, besides the fact that that is least confusing a difficulty to place the recycling bin.)

Answer 4

i think the 20 some yards is way to much . I think its .21 of a yard i would say you should get a 1/3 yard gravel and 3 bags portland cement mix 4 gravel to 1 cement .

Answer 5

Here's how you figure this out, from my notes:

for truck delivery, figure out how many cubic yards you need:
- multiply all dimensions in inches
- divide by 46656
- add extra just in case

36 x 68 x 4 = 9792 cu. in
9792 cu. in / 46656= 0.21 cu. yds
(an extra 10% would give you 0.21 x 1.10 = .23)

or, if using bags of premix:
1) figure out how many cubic feet you need:
- multiply all dimensions in inches
- divide by 1728
- add extra just in case

36 x 68 x 4 = 9792 cu. in
9792 cu. in / 1728 = 5.67 cu. ft
(an extra 10% would give you 5.67 x 1.10 = 6.24)

2) figure out how many 80lb sacks you will need:
- each 80lb sack makes 2/3 of a cu. ft, so divide cu. ft. by .67

6.24 cu. ft / .67 = 9.4 sacks (get 10).

Answer 6

Obviously not enough to have a truck come out.

Consider that a bag...of pre-mix; 60? 80? lbs. offers about 1.5 CU.FT. doing the math you can determine how many bags.

Steven Wolf

Answer 7

get 15 bags of quickcrete and take back what you dont use...should take about 12 bags... oh, 2/3 of a cubic ft. per bag doc...

Answer 8

2 yrds.

Answer 9

29.92 yds If your fussy!