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<DIV><FONT size=3> Greg</FONT></DIV>
<DIV><FONT size=3>Which Part?</FONT></DIV>
<DIV><FONT size=3> Dale</FONT></DIV>
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<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><=
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style="BACKGROUND-COLOR: transparent" face=Arial color=#000000
size=2>Dale,<BR> How do you determine t=
his?
Is there some formula?<BR><BR>Greg Newell<BR><BR><BR><BR>At 09:51 AM
2/18/2005, you wrote:<BR>> Dave<BR>> Another=
variable to keep in mind is that many of us are using sitka <BR>> spruc=
e
panels & the older designs used predominantly a softer eastern <BR>>=
;
wood. Softer wood under compression requires more thickness for strenght
<BR>> to survive. WHere as Sitka is stiffer denser having the greatest
strength <BR>> to wieght ratio. SO it can be thinner in the designs of =
any
kind. It <BR>> depends on your idea of mass in the panel too.<BR>>&n=
bsp;
I keep that in mind when I'm choosing panel thickness. This i=
s
also a <BR>> variable that could effect part of the equation for hammer=
selection.<BR>> I.E> many old Stwy A 2s had panels routinely .=
360
in the main part of <BR>> the panel. With Sitka .320 to 340 is plenty e=
ven
if you were stricitly <BR>> compression crowning.<BR>>
Dale</FONT></BLOCKQUOTE>
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