<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <META content="MSHTML 6.00.2800.1400" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#d8d0c8>I'm referring to discussions last year where it = was argued that it was impossible for wood as a material to support an arch, = because of cellular-level crushing ("compression set").  I believe the = counter to this demonstration was to show how little pressure was required to = push down on the arch and collapse it.  Therefore the wood alone = wouldn't be strong enough to support string downbearing (for example, the = soundboard compressed by the rim, without any ribs). I don't mean to = resurrect the prior argument, but just as in any profession, it's difficult for = a student like me to try to figure out what "best practices" are. --Cy-- ----- Original Message ----- From: "Avery = Todd" <<A href="mailto:avery@ev1.net">avery@ev1.net</A>> To: = "Pianotech" <<A = href="mailto:pianotech@ptg.org">pianotech@ptg.org</A>> Sent: Friday, May 28, 2004 7:56 PM Subject: Re: Practical Concert Work > Cy, > > Admitedley, I haven't read the = article yet but I don't understand what this > means. > > Avery > > >The M & H factory tour article mentions = that the factory technician did the > >old demo of a business card's = extra thickness forming an arch in a length of > = >spruce... > > > >--Cy Shuster-- > >Bluefield, = WV > > _______________________________________________ > pianotech list = info: <A href="https://www.moypiano.com/resources/#archives">http://www.ptg.org= /mailman/listinfo/pianotech</A> </BODY></HTML>