Terry, Why the concern for ply to hold a screw? Surely this is the basis for tuning pins holding in pinplanks. On 18 February 2011 11:51, Terry Farrell <mfarrel2 at tampabay.rr.com> wrote: > I will be fabricating a new bottom board for a customer's vertical piano > (moisture/mold damage). Any opinions on the best material for the job? > > I suppose some sort of plywood. I am using a hardwood veneered > gazillion-ply plywood for another project and am surprised at how soft it is > - I don't think that will be the best thing. My concern is for screw > holding. I don't know my plywood grades all that well. I should think an > exterior grade of ply made of yellow pine or something similar with one side > sanded (the inside side) would do the job well. Is there a grade designation > that specifies good hard wood that will hold a screw well? > > Or should I just make it out of a couple pieces of edge-glued (some sort of > water-proof glue) hard maple? I have tons of that in my shop - I would have > to make a trip to the lumber yard for plywood. > > Comments? Suggestions? > > Thanks! > > Terry Farrell -- Bruce Browning The Piano Tuner -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20110218/557ca22e/attachment.htm>
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