rolled bridge

[Farrell]

Describe the ridge on the soundboard. Just because the board is deformed in some manner, does not necessarily mean the bridge has moved. What are the downbearing angles - speaking length, bridge top, and backscale? What is the bridge shape like all along and to the front and rear of long bridge?

I think most of what some techs refer to as "bridge roll" is major soundboard deformation. I have a 102 year old Bechstein where the soundboard has an "S" profile along the ribs. The long bridge is canted toward the rear of the piano. I guess you could call that bridge roll, or just what it is - a warped soundboard.

Terry Farrell
  
----- Original Message ----- 
From: "Wayne Hohle" <wayne.hohle@sympatico.ca>
To: <pianotech@ptg.org>
Sent: Wednesday, September 25, 2002 1:17 PM
Subject: Re:rolled bridge


> 
> hi there
> the other day i looked at a cutomers piano, a grand about 5'6'', that had a long crack on the hitchpin side of the bridge, the tenor treble bidge,. the sound board was also ridged there so this must be a rolled bridge. the tone quality was also very weak. what caused a bridge to roll in the first place, and what is  the repair solution
> thanks
> wayne
> 
> _______________________________________________
> pianotech list info: https://www.moypiano.com/resources/#archives