Mostly, as Andy says. Over time the fibers take more and more of a "set,"
however.
If you trust Yankee technology, try some of this. Timber names may differ,
but wood's still cellulose, hemicellulose and lignin.
http://www.fpl.fs.fed.us/tmu/publications.htm
"Grainger Morris" <[email protected]> wrote in message
news:[email protected]...
> Books give radial and tangential shrinkage rates for timber from their
green
> to dry states. Will the dry timber expand at those same rates if the
> moisture content goes up?
>
>
"Grainger Morris" <[email protected]> wrote:
> >Books give radial and tangential shrinkage rates for timber from their
green to dry states. Will the dry timber expand at those same rates if the
moisture content goes up?
Doug Miller <[email protected]> schreef >
> Yep.
***
Strictly speaking: no.
There is lagging effect: a piece of wood being dried to 20 % will be more
voluminous than a piece of wood taking up moisture to 20%.
PvR
"Grainger Morris" <[email protected]> wrote:
> >Books give radial and tangential shrinkage rates for timber from their
green to dry states. Will the dry timber expand at those same rates if the
moisture content goes up?
Doug Miller <[email protected]> schreef >
> Yep.
***
Strictly speaking: no.
There is lagging effect: a piece of wood being dried to 20 % will take up
more volume than a piece of wood taking up moisture to 20%.
PvR
On Wed, 24 Nov 2004 13:23:24 +1100, "Grainger Morris"
<[email protected]> wrote:
>Books give radial and tangential shrinkage rates for timber from their green
>to dry states. Will the dry timber expand at those same rates if the
>moisture content goes up?
In the main, yes.
Over time and a number of slow moist/dry cycles, it becomes slower to
respond and moves less. This is the difference between drying timber
until it's dry, and seasoning timber for even longer (some years)
until it's more stable.
--
Smert' spamionam
In article <[email protected]>, "Grainger Morris" <[email protected]> wrote:
>Books give radial and tangential shrinkage rates for timber from their green
>to dry states. Will the dry timber expand at those same rates if the
>moisture content goes up?
Yep.
--
Regards,
Doug Miller (alphageek-at-milmac-dot-com)
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