Hi Nick: I'm trying to understand this too. Do these MOE values mean that Sugar Pine is about 75.8% as stiff as Sitka Spruce? If one were to substitute a sugar pine rib for a sitka spruce one, how would one go about calculating sizing the sugar pine rib to accommodate the same loading as a sitka spruce rib of given dimensions? Will Truitt -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Nicholas Gravagne Sent: Thursday, February 24, 2011 11:06 AM To: pianotech at ptg.org Subject: Re: [pianotech] MOE for sugar pine versus sitka spruce David, Your chart is compiled in SI units. So, making conversions from English MOEs for Sugar Pine and Sitka, we come up with this: Sugar Pine MOE = 837 Sitka Spruce MOE = 1104 Now you can compare this data to your chart. I assume you are considering for evaluating rib materials? No need to reply to this question, though. Hope this helps > > > -----Original Message----- > From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On > Behalf Of David Love > Sent: Wednesday, February 23, 2011 7:31 AM > To: pianotech at ptg.org > Subject: [pianotech] MOE for sugar pine versus sitka spruce > > In the chart below does anyone know which MOE corresponds more closely > to sugar pine and sitka spruce or just happen to know the MOE for each > of those? > > http://www.csudh.edu/oliver/chemdata/woods.htm > > > David Love > www.davidlovepianos.com > > > > -- Nick Gravagne, RPT AST Mechanical Engineering
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