but if you're doing this where there is insufficient moisture in the ground
(like a desert area) to be absorbed by the top and cause expansion, then you
need a special switch which you flip to cause the sun to heat the top and
dry the top out (more) and contract - ergo, the top would cup upwards.......
These switches are available at the borg's for the low cost of $19.95.
;-)
Bob S.
"Doug Miller" <[email protected]> wrote in message
news:[email protected]...
> In article <[email protected]>, JGS <[email protected]>
> wrote:
>>When it adsorbs moisture from the ground and starts to cup, would the
>>edges cup up or down? Thanks for helping me through this senior's
>>moment. Cheers, JG
>
> The side toward the ground will be the damp side; wood expands when it
> absorbs
> moisture; ergo, the side toward the ground will expand more than the upper
> side, and the edges will cup upward.
>
> --
> Regards,
> Doug Miller (alphageek at milmac dot com)
>
> It's time to throw all their damned tea in the harbor again.
In article <[email protected]>, JGS <[email protected]> wrote:
>When it adsorbs moisture from the ground and starts to cup, would the
>edges cup up or down? Thanks for helping me through this senior's
>moment. Cheers, JG
The side toward the ground will be the damp side; wood expands when it absorbs
moisture; ergo, the side toward the ground will expand more than the upper
side, and the edges will cup upward.
--
Regards,
Doug Miller (alphageek at milmac dot com)
It's time to throw all their damned tea in the harbor again.
On Mon, 13 Feb 2006 06:29:10 -0500, JGS <[email protected]> wrote:
>When it adsorbs moisture from the ground and starts to cup, would the
>edges cup up or down?
If it's wet, then it expands. If it's wetted on just the bottom, then
it will curve upwards.
If it's generally damp and reaches equilibrium with both sides, then oit
depends on how the growth rings run. They straighten when drying and
tighten when wetted.
If it's plywood or veneered, then it could do anything.