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How do u caculate the amount of dirt to be remove from ahillside if i want to tier it off

Each section will be 70 ft long *3.5 ft high....then it will go back 4ft and start another wall.... Another 4ft an another wall (total 3 walls)
 

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A little math is going to get you close.

The area of a triangle can be found by multiplying the base times the one-half the height.

area = 3.5 feet * (4 feet /2)
area = 7 square feet of area per triangle, and you have 70 linear feet so (7*70) equals 490 square feet or (490/27) = about 18 yards of dirt.
 

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I'd figure it this way:

70 feet X 3.5 feet X 4 feet = 980 sf

980 x 3 walls = 2940 sf

2940/27 sf (one cubic yard) = 108 cubic yards without swell

I figure you'll be using geogrid to help retain the walls. Therefore, I
figured you have to do use bench cuts for them.

Peace,


Rex Mann
 

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I came up with 54 yards total and you came up with 108? Somebody is off. :cheesygri

Getting even more precise don't forget the dirt that will be removed from behind the walls if you install drain tile and gravel also.
 

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Mike,

You figured removing a tringle shpae section of soil. I figured on removing
a rectanular section for the geogrid. That's why I'm twice what you are.

Peace,

Rex Mann

our web site
 
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