---------------------- multipart/alternative attachment >Ah, Ron, we can tell you're not a wooden boat builder! That's right, strictly pianos in my case. >A good scarf joint will equal the strength of a solid wood beam. And >it will have a slope of 1:8 (non-structural use) or 1:12 (structural >use). Sure, but no one has to my knowledge built pianos bridges with such low scarf angles, since there would be a greater wastage of wood with a lower angle and it is not required from a structural perspective. While I was aware joint strength increases relative to the scarf angle, I felt it appropriate for the sake of brevity not to write a thesis on the matter. My apologies if you felt I didn't address the issue adequately. I mentioned the 1:5 joint as typical because that's what it is typically used in piano bridges. >The amount of slope also varies with the glueability of the wood >being joined. Spruce bonds very easily, maple somewhat less so. >Finger-joints, by the way, are simply a form of scarf-joint. In this >case the scarfs are made short and are stacked for less wood waste. > >We can compromise on the slope of the scarf in the construction of >piano bridges because it is a "non-structural" application. The >absolute beam strength is not critical. Thank you. > Del Ron O. -- _______________________ OVERS PIANOS - SYDNEY Grand Piano Manufacturers Web: http://overspianos.com.au mailto:info@overspianos.com.au _______________________ ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/bb/7f/72/b6/attachment.htm ---------------------- multipart/alternative attachment--
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