In a message dated 99-03-19 16:45:04 EST, pbarkey@gw.bsu.edu writes:
> McMaster-Carr does have grade 2 galvanized bolts in their catalog.
> Tensile strength is listed as 74,000 psi.
>
> I realize that this is not ideal, and that something like grade 5 would
> be better. But the half inch bolt is also quite a bit bigger than
> most other tower joint bolts I see.
>
> Can I get the grade 2 bolts, or should I keep looking? I assume that
> the only concern is having the bolts shear. Compression failure
> doesn't seem like a problem, given the joint overlap.
Hi, Pat --
I think your gut feeling is the one to follow. Rohn specs Grade 5 bolts
for 55G. They're 7/16 inch so not too different than your requirement. You'll
never go wrong by over-engineering something.
Cheers, Steve K7LXC
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