Compression rigs (ridges)

[David Love]

The rib dimensions and layout certainly change quickly leaving the bass
area.  It looks like maybe 17 ribs?  The ribs in the upper end appear to be
quite wide but fairly short.  Are you planning to use the original rib
configuration and dimensions or reengineer the piano?

David Love
davidlovepianos at comcast.net 
www.davidlovepianos.com

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Stéphane Collin
Sent: Wednesday, June 21, 2006 2:23 AM
To: Pianotech List
Subject: Re: Compression rigs (ridges)

Thanks for correcting and enlighting me David.
I'll put a new board in this one.  Just for fun, I join a pic of the ribbing

: heavy construction methink.

Best regards.

Stéphane Collin.



----- Original Message ----- 
From: "David Love" <davidlovepianos at comcast.net>
To: "'Pianotech List'" <pianotech at ptg.org>
Sent: Wednesday, June 21, 2006 5:50 AM
Subject: RE: Compression rigs (ridges)


Those aren't what compression "ridges" look like nor does a compression
ridge mean the soundboard is out necessarily.  A compression ridge is
usually a single and slightly raised line along the grain, though there may
be several compression ridges in a single panel.  They usually run the
length of the panel or a good portion of it.  This looks more like a
mottling of the finish.  It's hard to imagine an 1898 soundboard has much
left in it no matter what the circumstances, though.

David Love
davidlovepianos at comcast.net
www.davidlovepianos.com