----- Original Message ----- From: "gordon stelter" <lclgcnp@yahoo.com> To: "Pianotech" <pianotech@ptg.org> Sent: July 21, 2003 5:37 PM Subject: Re: "Structural limits of the materials?" please explain. > O.K.. So wood crushes. But, after it has reached its > limit of "compressibility" ( i.e, the softer portions > between the rings have compressed to the full extent > that they will from normal piano condition (NPC)) > wouldn't the remaining portion of the board be even > more likely to accept and retain re-crowning from a > shim along the perimeter, and shims in extant or > manufactured cracks, than would a new board? > Cheerfully, > Thump There is no "limit of compressibility." Shimming old soundboards does not, will not and can not "re-crown" an old compression-damaged soundboard enough to affect its acoustical function. See Soundboard Damage Parts I, II and III in the December 1997, January 1998 and February 1998 Journals, respectively. Del
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