On Mar 21, 6:54 pm, "Steve Barker"
wrote:
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
roups.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
I guess we should just close all the libraries, publishing houses,
research activities & pencil manufacturers.
I checked with my field guys (who remove TONS soil) they also think
your number is low for soil to be excavated.
Perhaps in situ soil (the stuff the OP's got in his crawlspace) is in
fact denser than the moist "pulverized topsoil".
When you dig it up it loses compaction & density but when you start
with undisturbed soil, its denser.
btw OP doesn't have "moist pulverized topsoil"....he has sandy loam.
Also tell me me how you got 166 yds? I get 176.
cheers
Bob