I don't go by "pcf's" or books. I go by real life. In the landscaping
business we load trucks with dirt daily. Somewhat moist pulverized topsoil
is 1 ton per yard. No matter what some pencil pushing geek book writer
says.
--
Steve Barker
YOU should be the one
controlling YOUR car.
Check out:
www.lightsout.org
"BobK207" wrote in message
ups.com...
On Mar 20, 6:44 pm, "Steve Barker"
wrote:
A yard of dirt is only about a ton damp, and he's only talking about
roughly
166 yards. So it's considerably less than your mistaken math.
--
Steve Barker
YOU should be the one
controlling YOUR car.
Check out:www.lightsout.org
"BobK207" wrote in message
ups.com...
Good to see you're a CE but what do you plan to do with the ~200 yds
of dirt?
~ 3000 tons
That's ~8 "double dumps"
btw I've done the shop vac "moving sandy soil / damp sand" experiment
medium sized shop vac ~10 gallon........ soil removal rate ~ 1gpm
so you've got something on the order of 650 hours of vacuum
time.....not including time to empty & dispose of the dirt.
We're taking about ~100 days of vacuuming (if you can keep at it for 6
hours per day) Even if I'm high by 2x .....still 50 days of
vacuuming!
Consider contracting with a vacuum excavator.
Your new footings are 24" wide? How deep?
I hope they go below your intended excavation depth.
cheers
Bob
Steve-
Oops!
My arithmetic is fine but my reading needs a little work.........
I read he was digging another 42" but he's digging down to 42", which
is really only another 38".
So I calc'd 194 yds & rounded up to 200.......at 38" additional dig
its 175 yd
the ~3000 tons was a slip on the keyboard (an extra zero) & no proof
reading should have been 300 tons
clearly 3000 tons cannot fit in 8 double dumps!
I used a guessed estimate of 100 pcf for soil weight (2700lb / yd)
Researching density of sandy loam gives 80 to 90 pcf. I think your
number of 74 pcf is a little light.
So my arithmetic is fine, its the input assumptions & my typing that
need a little work.
Independent of the exact (real) numbers ~200 tons he's still facing a
job that will take many days if done hand.
cheers
Bob