Does anyone out there have any figures for the coefficients of expansion for maple? I am interested in calculating how much more a maple table top will expand (due to changes in humidity) in width in comparison to a bread board end on the same table using the same material.
Some time ago I remember seeing something that stated the wood can expand about 8 times as much across the grain as opposed to the length.
Any help is appreciated.
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Replies
The USDA has the handbook of "Wood as a Structural Material". You will want chapter 3 I think.
http://www.fpl.fs.fed.us/documnts/FPLGTR/fplgtr113/fplgtr113.htm
The Shrinkulator might also help you:
http://www.woodbin.com/calcs/shrinkulator.htm
forestgirl -- you can take the girl out of the forest, but you can't take the forest out of the girl ;-)
Thanks, that site was a help. Just goes to show that if you ask the right question, you will get the answer you need
Weasel
Anytime! Keep in mind, if you ever need it they also have a Sagulator. Too funny. Tells you how much a shelf will sag under a given amount of weight.forestgirl -- you can take the girl out of the forest, but you can't take the forest out of the girl ;-)
The values are as follows:
Bigleaf radial = 0.00126 tangential = 0.00248
Red r = 0.00137 t = 0.00289
Silver r = 0.00102 t = 0.00252
Sugar/black r = 0.00165 t = 0.00353
The applicable formula is:
Thanks, that was great; just what I was looking for
Weasel
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