Twist-off bolts
Twist-off bolts
(OP)
If the contractor uses a twist-off bolt in a connection where slip-critical is not required, is there any problem with having the bolt only tightened to the snug-tight condition? I can see where this might confuse someone who inspects the job, but I don't see any other problem.





RE: Twist-off bolts
Having said that, I am aware of certain methods of removing the sprue or tang in order to install the fastener so as to indicate "properly torqued". I am not blind. I know this happens---it's still ill advised and illegal!
Moreover, why would one wish to use an expensive TS where a cheap A 302 would suffice?
Rod
RE: Twist-off bolts
RE: Twist-off bolts
I would advise you to check into codes before signing off something like this.
Rod
RE: Twist-off bolts
There should be no additional expense involved in tensioning the TC bolts until the splins are torn. If they are removed and replaced with a lower grade bolt there is an expense in that i would not allow the TC bolts to be reused. I can't tell if they were over torqued!
RE: Twist-off bolts
It is not at all uncommon to find hard bolts where soft were specified and as long as the hard bolts were brought to the torque/tension spec for the HARD bolt, no harm , no foul. Sometime, as I said above, it was not cost effective to do so and in that case, I would have them switched out.
Most inspectors (well maybe not the ones for Cal Trans
Rod