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View Full Version : volume displacement of 2x4 lumber

jmkanek
09-09-2009, 08:27 PM
i was wondering if anyone knew how to calculate the volume that a 19 1/4 inch long 2x4 would take up inside a box for a brace, any help would be great thanks

bball09124
09-09-2009, 08:30 PM
:laugh:

Gearstix
09-09-2009, 08:30 PM
I would assume you would subtract its volume from your box volume.. so..

V=LxWxH..

19.25*2*4=153in^3

soo..

153 (in^3) = 0.0885416667 cu ft

I think thats right.

jmkanek
09-09-2009, 08:31 PM
:laugh:

and whats so funny sir!!!:eyebrow:

Lonnie
09-09-2009, 08:37 PM
Turn the lumber into cubic feet/inches and subtract it from the cubic feet/inches that you have for your box? Not too sure though...

galacticmonkey
09-09-2009, 08:38 PM
and whats so funny sir!!!:eyebrow:

Youre dumb. Thats whats funny.

jmkanek
09-09-2009, 08:45 PM

jmkanek
09-09-2009, 08:46 PM
Youre dumb. Thats whats funny.

MakeshiftAudio
09-09-2009, 08:48 PM
Wow. Someone forgot basic geometry.

And even then, the one that gave the math is wrong.
2x4s are not 2"x4". The OP will have to measure the 2x4 to find it's actual size, but generally it is 1.5"x3.5". Multiply these two numbers and then by how long the piece is. Subtract this number from the volume of the box. Remember to convert units. :)

jmkanek
09-09-2009, 09:02 PM
Wow. Someone forgot basic geometry.

And even then, the one that gave the math is wrong.
2x4s are not 2"x4". The OP will have to measure the 2x4 to find it's actual size, but generally it is 1.5"x3.5". Multiply these two numbers and then by how long the piece is. Subtract this number from the volume of the box. Remember to convert units. :)

yeap i caught that once i came back to planet earth, been a long a** day, :crazy:

MisterBlonde
09-09-2009, 09:52 PM
Do they teach math in school these days? This is middle school stuff.

The answer is 0.05848524306 cubic ft.

mrogowski
09-09-2009, 09:54 PM

Stephen_c
09-09-2009, 09:54 PM
Wow. Someone forgot basic geometry.

And even then, the one that gave the math is wrong.
2x4s are not 2"x4". The OP will have to measure the 2x4 to find it's actual size, but generally it is 1.5"x3.5". Multiply these two numbers and then by how long the piece is. Subtract this number from the volume of the box. Remember to convert units. :)

x2.

fawkn noobs

Lonnie
09-09-2009, 10:05 PM
Do they teach math in school these days? This is middle school stuff.

The answer is 0.05848524306 cubic ft.

A little exaggeration aye? 3d geometry is high school.

Gearstix
09-09-2009, 10:09 PM
Wow. Someone forgot basic geometry.

And even then, the one that gave the math is wrong.
2x4s are not 2"x4". The OP will have to measure the 2x4 to find it's actual size, but generally it is 1.5"x3.5".
I didn't know that.

muddin wolvy
09-09-2009, 10:54 PM

Whats wrong with using a 2x4 as a brace? Building my first box and about to put one in there... maybe

MasterOfAllBass
09-10-2009, 02:08 AM
not to an *** but sometimes i wonder about you guys.....

JimJ
09-10-2009, 02:12 AM
I didn't know that.

2x4s haven't been 2"x4" since WWII, at least.

halfwaytohell
09-10-2009, 02:14 AM
2x4s haven't been 2"x4" since WWII, at least.
and u dont delete this thread u let it go on. 2012 THE END IS NEAR

JimJ
09-10-2009, 02:15 AM
and u dont delete this thread u let it go on. 2012 THE END IS NEAR

Shut up.

halfwaytohell
09-10-2009, 02:15 AM
Shut up.

b itch please i know u ant talkin to me. :) lol

MasterOfAllBass
09-10-2009, 02:21 AM
b itch please i know u ant talkin to me. :) lol

god! U like raising hell around here dont you?

halfwaytohell
09-10-2009, 02:22 AM
god! U like raising hell around here dont you?
i have been ban more then any one. sh it i have like 10000 post in less then a year. sad if u ask me. masterofallbaiters

Gearstix
09-10-2009, 02:23 AM
2x4s haven't been 2"x4" since WWII, at least.

Metal is more of my thing, not wood. Even still though, the difference between my math and the 'correct' math is very small.
I'm still learning with math and I've struggled with it for years.

I dobut one '2x4' brace would impact your boxes volume enough to notice at all, it seemed rather miniscule.

Blue Fury
09-10-2009, 02:45 AM
If you want to get really precise, you'll take the rounded edges into account.