> In a rib crowned and rib supported board, maybe 95%-100% of the stiffness > comes from the ribs. In a compression crowned board, probably somewhat over > 120% of the stiffness comes from the panel, since the ribs supply negative > stiffness and crown support. A rib crowned but panel supported board is > somewhere above 0%, and under 100%. And do forget about the arch. It still > doesn't work that way. Ron, what is a panel supported board? Calin Tantareanu ---------------------------------------------------- http://calintantareanu.tripod.com ----------------------------------------------------
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