Most anchor bolts are specified as ASTM A-325---I would want to
be absolutely certain that whatever was substituted exceeded this
specification before I put life and proterty at risk! They are also long
enough and formed in such a way to guarantee that their
attachment to the concrete base exceeds their tensile strength
so there is no rish that they might be pulled out of the concrete.
You can go to custom bolt houses and have them fabricate
anchor bolts to your specification, including the heat treating and
galvanizing for a lot less money than what Rohn gets for them!
Don't know about anywhere else, but in the Denver area there is
McAtee Bolt (that is now part of A&I Nut and Bolt) but check the
yellow pages of any large city.
John Brosnahan W0UN
24115 WCR 40
La Salle, CO 80645
"Radio Contesting IS a Contact Sport"