How to figure displacement of a 2x4

[bgowdy 5,000+ posts]

this may be a lame noobish question but i dont know how i go about this......

Click to read more...

 

[adulbrich 5,000+ posts]

Multiply the length in inches by 8. This will give you the volume of the board in cubic inches.

Do you need to know the conversion factor between cubic inches and cubic feet?

 

[bgowdy 5,000+ posts]

Multiply the length in inches by 8. This will give you the volume of the board in cubic inches.
Do you need to know the conversion factor between cubic inches and cubic feet?

lol, really i think im about to just use 1.5 inch dowel rods, my math is a bit rusty....

 

[bgowdy 5,000+ posts]

Multiply the length in inches by 8. This will give you the volume of the board in cubic inches.
Do you need to know the conversion factor between cubic inches and cubic feet?

hm... never mind i think i have it? 20in * 8 = 160 cubic inches = .0.092

 

[garychoffmann 10+ year member]

Yes your math is correct but a 2x4 is actually 5.25 x length so it would actually be 5.25x20 =105 cubic inches so roughly .061 cubic feet

 

[bgowdy 5,000+ posts]

Yes your math is correct but a 2x4 is actually 5.25 x length so it would actually be 5.25x20 =105 cubic inches so roughly .061 cubic feet

thanks

 

[brian84corvette 10+ year member]

a 2x4 generaly measures 1.5" by 5.25 or 5.5 depending on the store you go to.

actually measure what you have and plug it in to the woofer box wizzard at rockford fosgate site

would state that a piece of 2x4 measuring 1.5" by 5.5" by 12" long will displace .06 cubic feet

and that same piece of 2x4 measuring 24" long will displace .11 cubic feet

 

[bgowdy 5,000+ posts]

a 2x4 generaly measures 1.5" by 5.25 or 5.5 depending on the store you go to.actually measure what you have and plug it in to the woofer box wizzard at rockford fosgate site

would state that a piece of 2x4 measuring 1.5" by 5.5" by 12" long will displace .06 cubic feet

and that same piece of 2x4 measuring 24" long will displace .11 cubic feet

ok so im getting confused now with all this. what i need to figure is a 2x4 @ 20in long & another 2x4 & 18.5in long

 

[dragnix 5,000+ posts]

LxWxH divide by 12 gives you cubic ft. That's not so hard. Unless i'm totally missing the question

 

[brian84corvette 10+ year member]

20 inches long displaces .10 cubic ft

18.5 displaces .09 cubic ft

 

[garychoffmann 10+ year member]

a 2x4 generaly measures 1.5" by 5.25 or 5.5 depending on the store you go to.actually measure what you have and plug it in to the woofer box wizzard at rockford fosgate site

would state that a piece of 2x4 measuring 1.5" by 5.5" by 12" long will displace .06 cubic feet

and that same piece of 2x4 measuring 24" long will displace .11 cubic feet

A 2x6 measures 5.5. A 2x4 measures 3.5 x 1.5.....

Length x width x height = displacement since this is in inches divide the sum by 1728 to get cubic feet of diaplacement. (12x12x12= 1728 cubic inches in one cubic foot.

 

[azmcrae 10+ year member]

There are 1728 cubic inches in 1 cubic foot.

Divide your cubic inches by 1728 to get the cubic foot.

i.e. 3x3x3 is 27 cubic inches divided by 1728 is .0156 cubic feet.

 

[garychoffmann 10+ year member]

Here simplest form....

20 inches long = .061

18.5 inches long = .056

This is what 2x4 ' s are in those lengths. Sorry you got so many answers for a simple question

 

[brian84corvette 10+ year member]

im sorry i read 2x4 but somehow my brain just was stuck on 2x6

garychoffman is correct

 

[bubbagumper6 5,000+ posts]

The educational system has clearly failed a lot of you...