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wood weighs as much as a car costs
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I just hauled a big load of green (is
there any other kind?) Doug Fir home in
my poor little S-10; front end felt
pretty light. Out of curiousity, I
sample-weighed the stuff, and came up
with approx. 1.75 lbs per foot, for
2x4s. (Turned out I only had about a
1,000 lbs.)
I've been searching for a website that
had a chart giving weights for various
framing sizes, as well as plywood, mdf,
osb, etc. Anyone know of such a place?
*I have no idea what the woods weigh but would think that moisture content would play a big factor.Pete Draganic
*JimI've got a Handbook of Rigging (W.E.Rossnagel), that gives pounds per cubic foot. It also has table of "average" moisture contentIt lists Doug fir-larch @ 34 lbs per cubic ft at 15 % moisture content. As cut moisture content is 37% heartwood, 115% sapwoodScott
*take aunt Tilly next time.
*We always figured yellow pine lumber at 40 pounds per square foot, and 1/2" plywood at 50 # per sheet. No guarantee how accurate that is, but it's at least in the ballpark.
*From my 1941 Mark's Mechanical Engineers' Handbook:Specific gravities of different woods (g/cc)Ash, black : 0.55Birch, yellow: 0.71Cedar, white, red: 0.35Fir, Douglas: 0.48-0.55Hickory: 0.74-0.80Oak, red: 0.64-0.71Pine, white: 0.43Pine, Southern: 0.61-0.67Redwood, California: 0.42Plus lots of other, less common ones.To convert to pounds per cubic foot, multiply by 62.3 To convert to a board doot, 1x12x12, multiply by 5.2to convert to a board foot, 3/4x12x12, multiply by 3.9 So D.F. is 2 pounds per board foot (3/4x12x12).-David
*Gee, guys, I thought this was gonna be a quick and simple one! Here's what I had in mind, based on so-so scales and stuff I had on hand:THICKNESS TYPE WEIGHT (PER SQ. OR LF)1/8 MAHOG PLY .431/4 MAHOG PLY .621/4 OSB 1.067/16 OSB 1.521/2 ASH PLY 1.251/2 MDF 1.862X4 HEM/FIR (Dry) 1 PER 1’2X4 DOUG FIR (WET) 1.75 PER 1'I didn't have 3/4 AC FIR, or 3/4 OSB T&G or some other common things on hand. Just thought, though, that it'd be handy, if you're going to pick up a BIG load, to be able to figure out what it's gonna weigh.Jim.
*Yeh! You could even strap her to the hood like a bear in extreme cases! I like the way you think Dan!
*David - I believe you posted the densities of the woods. The math you posted is correct and jives with other data I have.Specific gravity is a dimensionless value and is simply a ratio of the density of a material vs. the density of water.I have a couple excel spreadsheets that can come in handy for this stuff. I'll post when I get 'em cleaned up.-Rob
*Jim,Wood is heavy.That's all I know. I used to carry it all day when I was a grunt on an apartment complex job site 27 years ago.Does that help any?Don't hurt your back.......Ed. Williams :)
*Hey Jim , did you weigh it in the morning or the evening ? I firmly believe it gets a helluva lot heavier as the day wears on . Chuck
*Rob: You're right, the table gave specific gravities, given dimensionlessly. When I attached units to it, I should have called them densities. -David
*Chuck,LOL!!Ed.
*wood weighs as much as a car costs
*too much
*As a wood technologist, I have a copy of the Dry Kiln Operator's Manual (DKOM). In Table 1-9 (Calculated weights of wood per MBF actual measure) the following values are cited for Douglas-fir.------------------------Moisture Content----------------------------------------------25%-----------40%-----------60%Coastal---------2,987---------3,283---------3,751;Interior West---3,050---------3,355---------3,833;Interior North--2,978---------3,282---------3,750;I typed this as a table but I guess it didn't translate properly so I hope you can figure it out.I hope it helps!
*Try the USDA Forest Service Wood Products Lab in Madison, WI. Sorry I don't have phone or web address.Try an inquiry at http://www.tree-tech.com/boardSome foresters hanging out there might have an answer.
*I'm looking at a little blue book called: "Pocket Ref" by Thomas Glover. On page 34 he cites gives "Density Lbs per Cubic Ft" for several species. Is this data any good for practical purposes even though it ignores moisture content(we are mostly using dried lumber anyway)?