Unusual rib structure?

[David Love]

If the cutoff bar doesn't leapfrog the ribs but the ribs must support the
panel on the other side of the cutoff bar to keep it from cracking then how
is this arranged.  Do you notch out the ribs to accommodate the cutoff bar?

David Love
davidlovepianos@earthlink.net


> [Original Message]
> From: Delwin D Fandrich <pianobuilders@olynet.com>
> To: Pianotech <pianotech@ptg.org>; <davidlovepianos@earthlink.net>
> Date: 5/8/2003 1:57:13 AM
> Subject: Re: Unusual rib structure?
>
>
> ----- Original Message -----
> From: "David Love" <davidlovepianos@earthlink.net>
> To: "Pianotech" <pianotech@ptg.org>
> Sent: May 07, 2003 9:32 PM
> Subject: Re: Unusual rib structure?
>
>
> > I noticed, the other day, on a Hamburg Steinway C, that the cutoff bar
> was
> > notched to allow for the feathered part of the rib to extend beyond it
to
> > the rim.  Is this counterproductive?  Generally, with cutoff bars do the
> > ribs terminate at the cutoff bar?
> >
> > David Love
> > davidlovepianos@earthlink.net
> >
>
>
> If you leave a substantial portion of a spruce panel unsupported it will
> buckle and probably crack. Assuming the soundboard cutoff is truly a
cutoff
> then the extended portion of the rib is simply there to keep the excess
> panel from self-destructing.
>
> Del