John Hartman wrote: > > I looked and you'r right. The 580 comes from "Wood as an Engineering > Material". Hoadly's is more resent, in the revised addition, so maybe it > reflects the new standard. Some of the other figures have been changed > as well. Check his book for an explanation, I recall there was something > about this in his book. > John Hartman RPT One other point; these figures don't specify if they are for radial or tangential compression. This would made a bit of difference with spruce. Hoadle gets into this but no figures are offered. Keep reading Richard! John Hartman RPT John Hartman Pianos [link redacted at request of site owner - Jul 25, 2015] Rebuilding Steinway and Mason & Hamlin Grand Pianos Since 1979 Piano Technicians Journal Journal Illustrator/Contributing Editor [link redacted at request of site owner - Jul 25, 2015]
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