Soundboardcrown

[Peter Kestens]

Terry,

That copy does interest me very much.  Can you please mail it to
PETER.KESTENS2@PANDORA.BE.

Thanks a lot in advance.

Peter

> -----Oorspronkelijk bericht-----
> Van: pianotech-bounces@ptg.org 
> [mailto:pianotech-bounces@ptg.org] Namens Farrell
> Verzonden: dinsdag 17 december 2002 19:31
> Aan: Pianotech
> Onderwerp: Re: Soundboardcrown
> 
> 
> Delwin D Fandrich wrote:
> > 
> > Even with this technique you should try to dry your 
> soundboard panel 
> > down to approximately 6% to 7% moisture content. This will still 
> > require a special heated room, or box, but it can be quite 
> simple. A 
> > plywood box large enough to hold your soundboard panel and 
> with room 
> > for a small space heater will do.
> 
> My box measures 8 feet by 6 feet by 1 foot. I have 250 watts 
> of DC heater bars on the bottom of it and a small fan (Radio 
> Shack) to circulate air. This set up will easily warm the box 
> 30 to 40 degrees F above room temp. Right now my box is 
> warming some test wood pieces for calibration. My room is 60 
> degrees F and 41% RH. The box is 90 degrees F and 17% RH. 
> According to the charts, this would produce an EMC of 3.8 or 
> so percent. Obviously, plenty drying power for any of my 
> needs. I have a reptile environment temperature controller 
> that keeps the temp real steady at whatever temp I dial in.
> 
> > You can estimate the moisture content of the soundboard panel by 
> > monitering the temperature and relative humidity inside the box and 
> > comparing those to charts printed up for the purpose. The US 
> > Department of Agriculture has placed the entire book, "Wood 
> Handbook: 
> > Wood as an Engineering Material" online.
> 
> Is this how you determine the MC of your panels before rib glue-up?
> 
> If anyone wants a copy of Chapter 3 of "Wood Handbook: Wood 
> as an Engineering Material" (it has the charts in it) I can 
> email a copy to you. It is in PDF format.
> 
> Terry Farrell
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