<!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN">
<HTML>
<HEAD>
<META content=text/html;charset=iso-8859-1 =
http-equiv=Content-Type><!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 =
HTML//EN"><!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<META content='"MSHTML 4.72.3110.7"' name=GENERATOR>
</HEAD>
<BODY aLink=#ff0000 bgColor=#ffffff link=#0000ee
style="BACKGROUND-COLOR: #ffffff; COLOR: #000000; FONT-FAMILY: Times =
New Roman; FONT-SIZE: x-small"
text=#000000 vLink=#551a8b>
<DIV><FONT color=#000000 face=Arial>It makes sense to me. The =
catch is
that sometimes the top is larger than it wants to be.</FONT></DIV>
<DIV><FONT color=#000000 face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Frank Weston</FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; PADDING-LEFT: =
5px">
<DIV><FONT face=Arial size=2><B>-----Original =
Message-----</B><BR><B>From:
</B>David M. Porritt <<A
=
href="mailto:dporritt@post.cis.smu.edu">dporritt@post.cis.smu.edu</A>&g=
t;<BR><B>To:
</B><A href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> =
<<A
=
href="mailto:pianotech@ptg.org">pianotech@ptg.org</A>><BR><B>Date:
</B>Monday, September 27, 1999 12:33 PM<BR><B>Subject: </B>Re: =
evaluating
sdbd. crown & bridge downbearings in a new =
piano<BR><BR></DIV></FONT>
<DIV><FONT color=#000000><FONT size=3>Frank:</FONT></FONT></DIV>
<DIV><FONT color=#000000><FONT size=3></FONT></FONT><FONT
size=3></FONT> </DIV>
<DIV><FONT size=3>I have not participated in this discussion =
simply because
it is over my head. I'm learning, not teaching. =
</FONT></DIV>
<DIV><FONT size=3></FONT> </DIV>
<DIV><FONT size=3>However, if you think if compression as the =
state where
something is smaller than it wants to be, and tension as something =
being
larger than it wants to be, that can simplify the engineering
definitions. If a traditionally crowned board is held smaller =
than it
wants to be, it is under compression. On this board that is
constrained by the rib, the bottom is smaller than it wants to be =
because of
the rib. The top is smaller than it wants to be because of the =
bottom
- and the fact that it is one piece, this panel. If the top, =
although
it is larger than the bottom, it's smaller than it wants to be, so =
it is
under compression.</FONT></DIV>
<DIV><FONT size=3></FONT> </DIV>
<DIV><FONT size=3>Does this make sense???</FONT></DIV>
<DIV><FONT size=3></FONT> </DIV>
<DIV><FONT size=3>dave<BR></FONT></DIV></BLOCKQUOTE></BODY></HTML>