Curve on Bridge Bottom

[Richard Brekne]

Ron Nossaman wrote:

Not quite sure I understand these figures below... you say crown heights.  Are you
refering to crown as measured when taking a straight edge along the bottom of the
soundboard and measuring the gap in the middle ?


>
> Hi Dale,
> Look at unloaded crown heights for "standard" 18M (60') radius ribs in a
> generic board.
> Rib #1, 2.6mm
> #3, 7.2
> #5, 9.4
> #7, 6.3
> #9, 1.8
> #11, 0.5
>

--
Richard Brekne
RPT, N.P.T.F.
Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html