New Ballast "Box"

[joshuabardwell]

I'm questioning the "1000 lbs" in a 30 gallon drum, though. Unless there's some collapsed star material included, I don't think it'd reach that weight.

The Internet says that, depending on the amount of water, typical Portland is about 15-16 lbs per gallon. YMMV.

 

[bullockcm]

Going by the original post, I would guess he used 80lb bags of concrete mix, should be pretty easy to figure out how much concrete went in. Add the rock in the bottom plus some water & 10 bags of concrete mix should be close to 1000lbs I would think.

 

[Rock knocker]

1 gallon = 8.333 pounds
30 gallons = 250 pounds
concrete = 2.1 density of water
granite = 2.6 density of water

Thereby: 30 gallaons of water @250 pounds X 2.6 = 650 pounds

Quite short of 1000