Curve on Bridge Bottom

[Erwinspiano@AOL.COM]

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In a message dated 5/4/2002 10:05:59 AM Pacific Standard Time, 
RNossaman@KSCABLE.com writes:


> 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

      And crowned ribs or not
>>>>Dale>>>>>>>

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