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<DIV>
<DIV> Terry</DIV>
<DIV> Is that a Weber grand? What does the bathroom scale =
say
the psi per go bar is 100 lbs or so?I'd be interested as to how much
precompression your board is showing in this condition. You can measur=
e it
in mm at the three treble plate struts before & after stressing I'=
ll
bet I know what it is.</DIV>
<DIV> Dale</DIV>
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<DIV><FONT face=Arial size=2><FONT face="Times New Roman" size=3><=
EM>David M.
Porritt wrote:</EM></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><EM>While you have an unstrung board is it possible to put weights on=
the
bridge approximating the downbearing load you expect to have then reexamin=
e
the crown and bearing angles? Would this give an elementary idea of =
the
board's ability to sustain that load?</EM><BR></DIV>
<DIV><FONT face=Arial>Yes indeed. I consider that to be an integral step=
to
setting up a new soundboard. I use go-bars to apply down-force to the brid=
ges
(see the picture below). I calibrate the go-bars by measuring the go-bar
pressure with a scale (see second picture - my wife keeps bugging me: "Ter=
ry,
where is the bathroom scale?"). I suspect that after one has built and set=
up
many, many soundboards, this step may not be necessary. But I find a
tremendous educational dimension to the process.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Terry
Farrell</FONT></DIV></FONT></FONT></FONT></BLOCKQUOTE></DIV>
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