Soundboard question

Richard Brekne ricb at pianostemmer.no
Tue Aug 19 02:43:53 MDT 2008


    If you want a lower amount of compression just rib the board at a
    higher EMC.  

    David Love

I do not want a board with a lower amount of compression.  I want a 
board that does not (can not in this case) react to changes in RH as 
much as a fresh panel does.

Terry, I can understand that a panel with much compression set might be 
more prone to cracking in to handling, but cracks in a ribbed panel are 
due to cross grain strains against the restraining force of the ribs as 
the panel reacts to RH changes. Lower reactiveness to RH would then 
imply lower propensity towards either compression ridges or tension 
cracks and higher stablity.  All other kinds of crack causing stresses 
are countered nicely already by the ribbing. Or what ?

Cheers
RicB


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