Stein-D rolled bridge

[Michael Gamble]

Hello David Renaud and List
S&S "D" year 2002 with rolled bridge? Bridge(s)?!
This sounds to me ultra serious. What can we learn from this? The problem 
needs exhaustively investigating. In view of the fact that many of us 
re-string such beasts (and I can only think this must be as a direct result 
of the original stringing process) what are the pit-falls which could lead 
to such a major problem? By re-capping would not the original problem still 
be present? Please post all thoughts and rectification proceedures that we 
may all learn!
Regards from Sussex-on-Sea.
Michael G.(UK)
----- Original Message ----- 
From: "David Renaud" <drjazzca@yahoo.ca>
To: <pianotech@ptg.org>
Sent: Monday, February 28, 2005 5:41 PM
Subject: Stein-D rolled bridge


>
>   Approx. 3 year old Steinway D
>   Appears to have a severely rolled bridge.
>
> Measurements.......
>  With a dial gauge I measure plus 10 at the back
> and 0 at the front at about D4. At about D5 0 bearing.
> Most readings are lower at the front then back
> throughout.
>
>  So I call in a friend with a proper bubble gauge who
> gets results consistent with mine. At D4 plus 24 at
> back, negative 12 front.
>
>  Of added significance may be that the bass bridge
> has roll; Negative 15 front, on second highest bass
> bridge note.
>
>  What motivated me to measure was buzzing back scale
> on the chrome plates, as if the rear of the bridge
> had lifted enough to eliminate good contact with the
> plate. Termination points do not stay seated, more
> buzzing has appeared over the winter.
>
>  There is still some crown on the board, as seen
> by a stretched string, but the bridge has rolled
> forward.
>
> Questions
>
>   This is a relatively new piano, so a warranter
> issue.
> What should be done?
> What is likely to be suggested?
> What arguments can be had against half measures?
>
>   If they suggest just recapping the bridges.
> They should do it; correct?
> Would such a solution be a band aid to a more serious
> soundboard problem?
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