[SML] Torqueing truss

[Bruce Cooper]

Or spend the $1400 on a torque sensing impact. (Oh, and calibrate it every 
day)

  Were it me, I'd just get multiple torque wrenches and trust other people to 
use them..

:Bruce Cooper

> Depends on how frequently you intend to replace all the truss bolts.
> Using a zip gun on Grade 8 hardware is a one-shot deal; using a zip
> gun on Grade 8 hardware over-and-over-again is not a Very Good Thing.
> A lot of people tend to think "if two seconds of ugga-duggas on this
> bolt is good, then five seconds of ugga-duggas on this bolt has to be
> better!" Those people are wrong; too many ugga-duggas and you've
> exceeded the plasticity and yield strength of the bolt, with
> potentially cataclysmic results. Or at the very least, you've deformed
> the threads, and now you *have* to force the nut down snug with an
> impact gun because you can no longer hand-thread the nut all the way
> down snug. At that point, that bolt should be "removed from service"
> (a polite way of saying "destroyed so no one ever tries using it
> again.")
> 
> Plus a manual torque wrench (usually) won't hurt your ears.
> 
> -DV