Oops, sorry. MC = wood moisture content - degree to which the panel is dried - 6.5 to 6.0% for RC&S up to 4% (if I remember correctly) for CC. Terry Farrell ----- Original Message ----- > MC=? > > -----Original Message----- > From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On > Behalf > Of Farrell > Sent: Thursday, March 30, 2006 12:12 PM > To: Pianotech List > Subject: Re: Question > > Rib Crowned and Supported - ribs shaped to relatively small radii, board > ribbed at relatively high MC, panel under little compression and has no > significant crown-supporting function. > > Rib Crowned - ribs shaped to relatively large radius (commonly 60-foot), > board ribbed at moderate to low MC, panel compression in part supports > crown. > > Rib crowned is a bit of a hybrid - somewhere between CC and RC&S. There > really is a continuum between the two extremes of CC and RC&S. > > Terry Farrell > > ----- Original Message ----- >> now how is Rib Crowned different from Rib Crowned and Supported? >> >> thanks >> >> Mike > >
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