American Welding Society Forum
can anyone tell me if you test bridge bolts like you do structural bolts?
There are additional tests required.
I'm curious as to what additional tests are required for bolts utilized in bridges?
One test is a rotational capacity test that's done for each bolt / nut / washer assembly lot, which verifies the presence and the effectiveness of nut lubrication, particularly on galvanized fasteners. It's also used to test the assembly’s tension strength, ductility, and the ability of the bolt to resist stripping. This test is performed in addition to the pre-installation verification testing for the installation method.
I am aware of the Rotational Capacity tests, and that is required under structural as well.
Not usually, unless the Engineer requires it per the project specification.
THANKS GUYS FOR THE INFO.
AASHTO has some direction on bridge bolting and typically you could look at RCSC. Depending on the type and strength of bolt you are using RCSC will give you some good insight. Also, look at Turn A Sure has some good info on bridge bolting.
Robert Shaw's bolting handbook is another good reference. It's pocket size and helps show some of these contractors who don't understand bolting and think that "tight is tight, what's the difference?"<--actual quote
I've been in structural steel fabrication for 42 years and I have never seen a rotational capacity test required in the project specs. That's why I mentioned it. The question was, are bridge bolts tested the same as structural bolts, and in my experience, they are not.... at least not in anything I've ever dealt with.
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