The sb press I devised last year does a good job of reglueing ribs without the need for screws. It entails a wooden i-beam and spring loaded plungers for pressure. The board is supported from underneath so as not to push the crown (if any :-) out. It's good for bridge caps as well. A jpg is available. Jon Page At 08:30 AM 5/13/99 -0700, you wrote: > > >Ron Nossaman wrote: > >> .... I'd say keep it simple and glue it down, which brings up another >> point. I've always wondered why rebuilders seem to want to glue bridges down >> with clamp pressures that exceed the crush point of the panel. I've always >> just glued with Titebond and clamped them on with one screw and a soundboard >> button between each rib along the length of the bridge, with an auxiliary >> clamp at the extreme treble of the long bridge for luck until the glue >> dries. No dowels through ribs, or other odd constructions, underneath. >> Haven't had one drop off yet. What do you other installers of bridges out >> there do? > >------------------------------------------ > >Ditto. Especially, the part about no dowels through the ribs. > >I've long wondered about the practice of putting a screw and/or a dowel through >the rib and into the soundboard. True, in the case of the compression crowned >soundboard the rib is fighting the formation and maintenance of crown. But in >every other case we are depending on the structural stiffness of the rib to hold >crown and support the string downforce load. Why, then, would we want to weaken >the rib by drilling a hole through it at precisely the point where we want it to >be the strongest? > >Del > Jon Page, Harwich Port, Cape Cod, Mass. mailto:jpage@capecod.net ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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