How much gravel do I need?


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Old 03-15-16, 03:49 AM
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Question How much gravel do I need?

Howdy,

I am installing a french drain behind my house and the wife and I measured 75 feet in length. I searched for "gravel calculator" and I think it said I needed like 8 tons of gravel. That seems excessive. Can anybody help a brotha out?
 
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Old 03-15-16, 04:09 AM
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I would just get 7 tons....LOL. Just kidding!! Buy some bags of #8 gravel from your local masonry supply. Start with 5 or 6 bags & buy more as/if needed.
 
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Old 03-15-16, 04:33 AM
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I'd have to disagree, a bag of gravel doesn't go very far. I wouldn't think one bag would cover more than a foot or so. How deep do you expect to pour the gravel? I don't know the answer as to how much is needed but I'm sure those that do would want that info.
 
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Old 03-15-16, 04:36 AM
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Stone yards won't deliver less than 1 cubic yard. He could go for that but could have left over.

How deep do you expect to pour the gravel?
It's shouldn't be deep at all. The pipe is 4 inches & the hole is about 6" deep & 6" wide.
 
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Old 03-15-16, 06:57 PM
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Thank you all. I think I will go w/ a min. of two tons. My coworker is doing a small french drain so if I have any extras, I'll just give it to him.
 
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Old 03-15-16, 08:40 PM
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75' in length at 12' wide and 6" deep will be 1/2 ft³ per linear foot, or 37.5 ft³. A cubic yard is 27 ft³.

a ton of gravel is listed at 18 ft³.

Factor in your width and depth or give us those numbers.

Bud
 
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Old 03-15-16, 10:08 PM
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How can it be 12' wide? I thought that we were talking about a 4" pipe?
 
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Old 03-15-16, 10:52 PM
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Slip of the finger, my friend. That is why I prefer to spell out foot or inch rather than use ' and ".
 
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Old 03-16-16, 03:46 AM
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My setup should be like this: 75 feet in length, 12 inches wide, 16 inches deep, and w/ a 4 inch pipe.
 
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Old 03-16-16, 05:25 AM
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Volume

3.7 cubic yards; at 1.4 tons per cubic yard, you need 5 tons of gravel.
 
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Old 03-16-16, 05:29 AM
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That's 1.33 ft³ per linear foot or 100 cubic feet of gravel. Minus 6.5 ft³ if you want to subtract the volume of the pipe.

By the ton (assuming 18 ft³ per ton) you would need 5.5 tons.
By the yard that would be 3.7 yards.

Just got up so if my fingers missed corrections welcome.

Bud
You were faster Ken
 

Last edited by Bud9051; 03-16-16 at 05:30 AM. Reason: lost the race
  #12  
Old 03-16-16, 05:25 PM
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You guys rock! See what I did there...I said rock because I was asking about gravel...hehe! Thanks again.
 
 

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