# 57 stone tonnage/yard

Discussion in 'Landscape Architecture and Design' started by johnlearn, Mar 12, 2005.

1. ### johnlearnLawnSite Memberfrom raleigh NCPosts: 1

Hi everyone, I'm putting in 57 stone for drainage, and I have a problem: I dont have the formula to calculate the amount I will need for a ditch 300ft long, 3 ft wide, and 2.5 ft deep. (Ditch is completely filled with stone). I also do not know the average lb per foot in order to figure out the formula myself. If anyone knows the formula or the average density etc. I would greatly appreciate it.

Thanks,
John

2. ### TurfdudeLawnSite Bronze Memberfrom South JerseyPosts: 1,899

I have never heard of "57 stone", but in general,

1 lxwxh+cubic feet
2 divide cuft/27 for cubic yards
3 with stone, 1 yard is approx 1.5 tons

so for your scenario 300X3X2.5=2250 cuft
2250/27=83.33333 (if I did this right in my head) cu yds
83.33333 cu yds=125 tons

3. ### olderthandirtLawnSite Platinum Memberfrom herePosts: 4,899

Bob 57s are approx. 3/4 inch stone and 1 yd is real close to 1 ton in weight. Sometimes the formulas work sometimes they don't but I think 100 yds top would be all he needs but that depends on what he putting them on the amount of settlement etc.
Just out of curiosity why are you filling that size ditch with stone ? I presume it has to be for drainage but are you using pipe?

Mac

4. ### bobbygeddLawnSite Fanaticfrom NJPosts: 10,178

1 ton 3/4" cover 80 ft sq. x 2" deep?

5. ### impactlandscapingLawnSite Silver Memberfrom Morgantown, WVPosts: 2,332

Mac is right on the money...300X3X2.5 with waste / uneven loading / varying trench depth/ site loss- call it 3.0, would be 2700 cu ft..divided by 27 cubic feet / yard = 100 tons...
at 30X3X2.5, that would be around 84 tons..with no waste factor / loss pecentage