rolled bridge...?

[Delwin D Fandrich]

----- Original Message -----
From: <Tvak@aol.com>
To: <pianotech@ptg.org>
Sent: December 21, 2002 6:37 AM
Subject: rolled bridge...?


> There's been alot of talk about 'rolled bridges' lately, and I don't
> understand what this refers to.
>
> Please explain.
>

Neither do I. In fact, I don't think I've ever seen one. I have seen a few
pianos in which the soundboard has distorted and, as a result, the bridge is
no longer square to the strings. Or anything else, for that matter. But this
is a soundboard failure having little to do with the bridge.

I wrote an article in the Journal several years back (mid-90s?) on this,
complete with a couple of drawings illustrating the various stresses on
soundboards, particularly compression-crowned soundboards, that can cause
distortions like this.

Del