Reply by ajosephg

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Posted on Does wood shrink lenghtwise when drying?

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1881 posts in 4066 days

#1 posted 05-28-2009 11:28 AM

TS – now you’ve done it – giving me something else to wonder about.

I Googled “Does wood shrink lengthwise” and got about 5000 hits and now my poor mind is really messed up.

The short consensus seems to be about 0.1 to 0.2% but with a disclaimer “that it all depends.” They talk about “juvenile” wood, “reaction” wood (compression or tension) as things that can cause longitudinal shrinkage to be much greater. And, of course, what part of the log it’s cut from. I guess when you think about it, uneven longitudinal shrinkage is what causes boards to bow or twist.

One of the books that popped up is “The Encyclopediia of Wood” which is written in farmer language if you are inclined for further investigation.

PS – Here is another book that looks good. “Understanding Wood: A Craftsman’s Guide to Wood Technology” by Bruce Hoadley. I think I will buy this one!!

-- Joe

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