Sitka EMC

[Delwin D Fandrich]

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  ----- Original Message -----=20
  From: Yardarm103669107@aol.com=20
  To: pianotech@ptg.org=20
  Sent: November 11, 2002 10:52 AM
  Subject: Re: Sitka EMC


  In a message dated 11/11/2002 5:56:27 AM Central Standard Time, =
mfarrel2@tampabay.rr.com writes:



    Sailboat spars come in a variety of designs, and many had lengths =
that were scarfed together, and the cross-section of the mast was made =
up of several pieces - that's how they made some masts hollow.



  Terry:
  I've spent too much time dealing with the old lake schooner =
builders--big boats with solid spars. The scarf joined masts are rare on =
these boats. But they're all still cured outside, up here anyway. This =
is the word I get from folks at the Maritime Society.

  Paul RJ


And I've spent too much time with folks selecting and processing Sitka =
spruce for aircraft construction, masts and spars and piano soundboards =
and ribs. They all tell me its a matter of self-control and due-process: =
controlling greed and doing the job right, in other words.=20

If you try to dry any wood--regardless of species--too fast there will =
be problems. If you follow the directions--and each species seems to =
have its own desired set of directions--there is no difference at all in =
the structural characteristics between so-called air-dried lumber and =
kiln-dried lumber. The problem comes in when the kiln tries to save =
money and pushes the process, drawing the water out of the outer regions =
too fast and setting up a variety of internal stresses. Then, yes, you =
can weaken the wood. Hence, the twisted and cracked 2 x 4's you see at =
your local Home Depot. But you can also weaken the wood if you dry it in =
the sun on a hot, sunny day. Hence, the sprinklers you see keeping the =
logs wet during the first stages of their drying process.

It takes time and patience to properly dry wood whether you do it in the =
'air' or in the kiln.

Del



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