Laminated Soundboard Ribs

[Delwin D Fandrich]

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  ----- Original Message -----=20
  From: Erwinspiano@AOL.COM=20
  To: pianotech@ptg.org=20
  Sent: February 12, 2002 1:42 PM
  Subject: Re: Laminated Soundboard Ribs


  Just look at new Stwys the're still using flat sawn sugar pine that =
must be 3 grains per inch. How strong can that be? Sugar pine is =
extremely variable.

Not very...but that's the point. With a compression-crowned soundboard =
system the rib can't be overly stiff or it won't bend as the wood panel =
takes on moisture after ribbing and expands.

Del

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