Bob, I don't know the answers to all of your questions, but I have repaired two or three separated Everett backs, using 5/16" carriage bolts and epoxy. No further problems. You understand, I presume, that the back is pulled together with clamps first, not just with the bolt. I think that wouldn't work. Regards, Clyde BobDavis88@AOL.COM wrote: > Subject: Everett studio, pinblock separating from back > > I need to bolt this sucker back together. I have done this repair twice > before with half-inch bolts (w/long-term success), and I know others have, > but I would like to take a fresh look at this from the perspective of the > engineers out there. > 1) I chose bolts empirically, and they worked. However, is there anyone out > there who knows the tensile strength of various diameters of bolts? Of > hardened bolts? > 2) How much strength do I actually need to resist breaking or bending of the > bolts? > 3) Is there an advantage or disadvantage to hardened bolts in this > application? > 4) Is the separating force the only one I need to worry about, or should I be > worrying about the shearing force tending to collapse the plate? > 5) In re: above, I have always assumed the bolts did all the work, and that > the glue line was contaminated/dirty enough it wouldn't cinch up completely. > Is there a glue better than Titebond for resisting creep in a glue line which > is both dirty and not as thin as it should be? Weldwood? Polyurethane > (Gorilla) glue? Are both the adhesive and cohesive strengths of epoxy > sufficient? > Thanks, engineers, > Bob Davis
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