Not what I was referring to. David Love www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Terry Farrell Sent: Monday, June 14, 2010 2:32 AM To: pianotech at ptg.org Subject: Re: [pianotech] Rib/Panel Clamping Methods - was: Fire hose failure! David's last sentence (quite sure I have this correct David....) is that by clamping the rib to the panel in a caul of the same radius of the rib, you are actually making the rib an additional 8 mm taller (if your panel is 8 mm). Now of course that is not entirely true because the grain angle of the panel is not nearly parallel to the rib - so the panel does not have the same resistance to compression forces that the zone of the rib closest to the panel has - but never-the-less, it does add to the rib - and you are adding no additional weight - so it's a stiffness freebie. If you are not pressing your ribs/panel in a radiused caul, you loose that potential benefit. How much is that benefit? I don't know - I presume it is fairly small, but real.
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