This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment ----- Original Message -----=20 From: Richard Brekne=20 To: Pianotech=20 Sent: October 14, 2003 2:49 PM Subject: Re: soundboard stresses =20 =20 I just noticed there was a reference to tension along the grain that = more or less says, we dont really have reliable data because measurement = is rather difficult and demand for the information is too small to = justify it. So it would seem difficult to make many conclusions about = tension with the grain.=20 The tensile strength for green Sitka spruce is 8,600 lb/in2. It is about = 13% higher at 12% MC. Remembering, of course, that this is an average of = several samples. And don't forget to degrade this figure by about 40% if = you intend to hang from it for more than a week or two. See the notes about this in the Wood Handbook. Chapter 4. Del ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/b1/8e/8b/b9/attachment.htm ---------------------- multipart/alternative attachment--
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