A36 vs. B7 Anchor Bolts
A36 vs. B7 Anchor Bolts
(OP)
I am erecting a 60x100 steel building. The structural engineer specified A36 anchor bolts, embedded in the reinforced concrete piers. I have 2 different anchor assemblies. I had no trouble getting the A36 "L" shaped bolts in 18". I have some shorter (8") piers where I will have to drill the footer and epoxy in studs. We messed up and did not insert the anchor bolts into the footers where the foundation is only a single course of CMU's. I have found a B7 alloy threaded rod which I plan to use with the epoxy. Once these are in place, we will pour the floor and fill the single course of block, embedding the required 12" in concrete. In addition, a nut and washer will be tack welded to the submerged end of the stud.
Are there any potential side effects to using the much stronger B7 material, as opposed to the A36? I tried to ask the structural engineer, but he does not respond to my voice messages or emails. I guess once the check clears the bank, I am on my own!
Are there any potential side effects to using the much stronger B7 material, as opposed to the A36? I tried to ask the structural engineer, but he does not respond to my voice messages or emails. I guess once the check clears the bank, I am on my own!





RE: A36 vs. B7 Anchor Bolts
One caveat is if you are going to tack the nut on the embedded end of the rod make the tack on bottom of the rod and nut, not on the inside of the nut. It is normally not considered a good practice to weld on B-7 studs. By weld on the bottom there is no influence on the strength of the threaded rod.
RE: A36 vs. B7 Anchor Bolts
Flying Hammer LLC a hot rod fabrication facility in Lincolnton, NC
www.flyinghammerllc.com
RE: A36 vs. B7 Anchor Bolts
I would suggest Hilti or Simpson...both have good systems with load ratings.
RE: A36 vs. B7 Anchor Bolts
Flying Hammer LLC a hot rod fabrication facility in Lincolnton, NC
www.flyinghammerllc.com