evaluating sdbd. crown & bridge downbearings in a new piano

Ron Nossaman nossaman@SOUTHWIND.NET
Tue, 21 Sep 1999 08:41:25 -0500 (CDT)


>Thanks Ron,
>
>We were taught to dry the board to about 10%, plus cut crown into the
>ribs, then the press, with the natural bend afforded by the calculable
>give of yellow pine under the pneumatic stress gave us a lovely
>predictable crown.  

>Roger Hayden, RPT
>Clarks Summit, PA
>


A little clarification here, if you would please. What does the 10% refer
to? Is that EMC, or relative humidity? I dry panels down to around 6% EMC,
which I forgot to mention in that last post. That's about 30% RH @ 70 degrees.

 Ron N



This PTG archive page provided courtesy of Moy Piano Service, LLC