Hi Ron, On Apr 23, 2006, at 7:15 PM, Ron Nossaman wrote: >> Positive bearing strings will stay seated just as well with >> positive crown as with negative crown. It's negative bearing >> strings which won't stay seated and which apply their force to >> destroy the pinning. That's regardless of positive or negative crown. > > It would take a tremendous negative bearing to pull a string up off > of a bridge against the slanted pins and offset angle, unless pin > slant was only very slight. Otherwise, strings don't un-seat from > bridges. Then some tremendous force must be at work, because strings which have crept upwards against slanted pins and side-bearing are a regular part of our day. And that's outside such at-risk conditions as a rolled bridge with negative bearing at the front and positive at the back. But the strings wouldn't have to be pulled up off a bridge for negative bearing to damage the pinning. An earlier comment of mine about "having to toss out bridge pins as a coupling mechanism" in the negative bearing scenario didn't seem to raise any comments. Mr Bill "Talking about music is like dancing about architecture" ...........Steve Martin +++++++++++++++++++++
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