I quite new to wood work measurements and I need figure out to figure out the cubic capasity of a box with the dimensions - 23cm width, 40cm height, 23 cm depth with the wood 1.8cm thick. Feet and meters would be handy. I would be very grateful of any answers.
13669.5 cubic cm/836 cubic inches/.01 cubic meters/.35 cubic feet ... mas or menos.
Standby: I'm sure someone will just love to prove that wrong (which may be quite easy to do), and let us both know in no uncertain terms. ;)
Ok. Here's my answer:
Assuming that you gave the outside dimensions for a fully enclosed six sided box:
23cm x 23cm x 40cm = 21160 cubic cm (volume of the box including the sides and ends)Subtract the volume of the 1.8cm wood:
1.8cm x 23cm x 40cm x 4(sides) = 6624 cubic cm (volume taken up by the four sides) 1.8cm x 21.2cm x 21.2cm x 2(ends minus the thickness of the sides) = 1617.984 cubic cm (volume taken up by the two ends)8241.84 cubic cm in wood.
21160 - 8241.84 = (> I quite new to wood work measurements and I need figure out to figure
Are those inside dims?
Do you plan to make the box and then put in a woofer of unknown specs?
The woofer's specs will tell you how big the box needs to be. You can't work backwards from a box dimension unless you plan to vent it. There are all kinds of nomograms around to determine the volume of a box. You should be able to find a copy of Martin Colloms's work in your library. Anything by Alexis Badmaieff or Don Davis will help you along too.
r
I _ASSume_, that "a box with the dimensions..." would be outside measurements, particularly since he specifically gave the thickness (1.8cm) of the wood.
(interior W)(interior H)(interior D) = interior volume
(23 - 3.6)(40 - 3.6)(23 - 3.6) = (19.4)(36.4)(19.4) = 13,669.504 cubic centimeters
Any errors from there are conversion error by using something besides "cubic centimeters" to convert to the next "cubic whatever".
... it's the way I did it, but what the hell do I know?
OK ... not much, obviously! :)
... oh yeah!
Forgot ... we will now get into how the box is constructed; butt joints, miter joints, rabbet joints ... all of which could have some effect on the final answer.
... maybe. ;)
I get the same answer doing it that way. I'm still trying to figure out why the difference in my previous post. If I did it right, it should come out the same.
Spoke too soon... I only subtracted 1.8cm for thickness of the top and bottom in my first attempt. Should have been 3.6cm for both sides.
Well, shit..isn't that obvious?? A lock-mitre bit of course...but which brand? Huh? Huh?
I may have jumped the gun a little on the question of inside/outside dims. From my perspective only the inside dims matter IOW. how much air is there in that box? Then the next question appears. The ratio/shapes of panels as to reduce standing waves at certain frequencies...but I could be talking shit here..
r
What kind of joint?
If it's a miter, the inside dimensions would be:
23- (2*1.8)=width 40- (2*1.8)=height 23- (2*1.8)=depthvolume= w*h*d
HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.