<HTML>In a message dated 1/21/2002 10:40:39 AM Pacific Stand= ard Time, pianobuilders@olynet.com writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT= : 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Subj:Baldwin Accu-Just Hitch= Pins--General Information Date:1/21/2002 10:40:39 AM Pacific Standard Time From:<A HREF="mailto:pianobuilders@olynet.com">pianobuilders@olynet.com</A= > Reply-to:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> To:<A HREF="mailto:pianotech@ptg.org">pianotech@ptg.org</A> Sent from the Internet Dale, Carl, et al,<FO= NT COLOR="#000000" style="BACKGROUND-COLOR: #ffffff" SIZE=2 FAMILY= ="SANSSERIF" FACE="Arial" LANG="0"> . Mostly, how much loading any= specific soundboard must have is a function of how massive and how stiff th= e soundboard assembly is. This is not a universal constant. Dale’s s= tring deflection numbers would not work( at?)( did you leave the at out?) al= l for one of our boards. As to whether they would work for one of Baldwin= ’s current boards—I cant say. With the Accu-Just system Bald= win has used a fairly light crown radius— </BLOCKQUOTE>   Del--Just so it doesn= 't appear that your dismissing my downbearing deflection no. derived from th= e experience myself and others out of hand, let me Re-state that these no.s = are real do work well in NON--REDESIGNED soundboards, which I must point out= most of us are doing. I think I was fairly specific as to the type of repla= cement board application that these numbers do commonly work in.   These values of downbearing  work well for me on 60ft. rib crown= ed boards(treble radius are tighter) but with some modification of the syste= m of prestressing, I suggest the procedure could be applied to many if not m= ost soundboard systems that exhibit some stiffness as they're being test loa= ded. Obviously totally flacid or under crowned systems woulf require a diffe= rent approach.   Perhaps you'd like to share what values you consider workable in a no= n-redesigned rib crowned soundboard system ? Or in your design system for th= at matter.   I was trying to give some others who asked what is rather typical way= s of setting bearing and some numbers for downbearing that many people I kno= w consider usual.         Dale Erwin <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT= : 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px"> </BLOCKQUOTE> </HTML>