<HTML>In a message dated 5/4/2002 10:05:59 AM Pacific Standard Time, RNossaman@KSCABLE.com writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Subj:Re: Curve on Bridge Bottom Date:5/4/2002 10:05:59 AM Pacific Standard Time From:<A HREF="mailto:RNossaman@KSCABLE.com">RNossaman@KSCABLE.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 > >                                        Richard, Terry >                       It doesn't take much to flatten an unsupported rib as > it  doesn't really take on its maximum stiffness till after it becomes part > of the ply wood componet comprising the whole soundboard system at which > point the cumulative resistive forces of cross banded woods and compression > takes effect.  I agree with Ron that the bridge because of its shape simply > rotates as the board flattens but there is still some nominal resistance to > bearing. Every little bit does some good. 100 lbs is a 100 lbs which IF that > is what it is, is roughly the same reisistance as one rib >> >> >> -- >> .>>>>>>>Best>.................Dale Erwin > And we all know how often the soundboard goes flat in the low treble area, crowned bridge or not. Ron</BLOCKQUOTE>       And crowned ribs or not >>>>Dale>>>>>>></HTML>