Then it is typical to leapfrog the cutoff bar over the ribs? I thought on the picture of Del's belly braces/cutoff bar that the cutoff bar was flat. Is the feathering of the ribs always designed so that there is an equal feathered length on opposite ends? David Love davidlovepianos@earthlink.net > [Original Message] > From: Ron Nossaman <RNossaman@cox.net> > To: Pianotech <pianotech@ptg.org>; <davidlovepianos@earthlink.net> > Date: 5/7/2003 9:51:59 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 > > A big area of panel unsupported by ribs outside the cutoff will buckle with > humidity swings. It's not acoustic, just administrative. > > Ron N
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