Ron N. and John H. wrote: > >Panel crowning puts the panel into more compression than rib crowning. I > >estimate this to be at most about 30% of maximum psi of side grain > >compression if building a soundboard with average dimensioned ribs. > > Interesting. You had it at 50% just bending the rib to a crown before the > strings were even on ...... These percentages stated, are they referring to the maximum compression, perpendicular to the grain orientation, that a panel of soundboard spruce can withstand before structural failure occurs (crushing of wood fibers)? Excellent discussion. Thanks. I'm groovin' on this stuff. I'll have about 83,756 more questions - once I even figure out what to ask! Terry Farrell
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