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Wood on the Move

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Wood Shrinkage II

Wood Shrinkage II

How wood shrinks Unlike a dissolving sugar cube, a block of wood doesn't behave the same in all directions as it shrinks. As shown in the illustration, wood shrinks most in the direction of the annual growth rings (tangentially). It shrinks about half that much across the growth rings (radially). And shrinkage with the grain (longitudinal) is minimal. The result: Combined radial and tangential shrinkage distorts the shape of any piece of wood because of the difference in the two shrinkage rates and the way the annual rings curve. A number of variables affect how and to what degree wood shrinks, But in general, the denser the wood, the more it shrinks.

Continued on page 4:  Finishes


Comments (2)
ralphcd wrote:

What would be a way to keep moisture in wood supplies in a dry climate like Las Vegas?

11/13/2014 10:13:47 AM Report Abuse
wolflahti wrote:

This is reversed in the Pacific Northwet (not a typo), where winters are far more humid┐indoors and out┐than the summer season (which doesn't last nearly so long).

11/6/2014 01:26:55 PM Report Abuse

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