Oct 12, 2015 · I have never seen A307 or A325 bolts specified for concrete anchors. Older drawings often times specified A36. Today, F1554 is the recommended specification for anchor bolts. There are 3 grades of F1554: Gr. 36, Gr. 55, and Gr. 105. An A307 bolt has material strengths similar to F1554 Gr.36. The A307 bolts may be OK.

Feb 3, 2006 · Apparently, as JStephen stated, MOST of the A307 bolts AND threaded rod is made from A36 steel. A307 Gr C, is a recommended specification that simply involves less certificationary paperwork that involves certain testing procedures which, unless required or specified by the engineer, can be avoided, thus costing less and producing virtually the ...

Aug 2, 2008 · We had designed for a 7/8" A307 anchor bolt and our customer wants to use an 3/4" F1554 bolt. In searching for the answer I would think the answer is no, they would need to be the same size because they are just about the same strenght.

Nov 19, 2001 · A307 is basically an ungraded bolt and A325 is grade 5 or so. I don't see a problem. I have done this sort of thing many times. One thing, which has happened to me,---the inspector may require you to torque the A325 bolts whereas the A307's do not require a specified torque (the somewhat ambiguous pull on a wrench by an average man???).

May 30, 2002 · Can A307 anchor bolts be bent, without a significant loss of strength? If there is a loss of strength, is it safe to use a portion of the full strength? The contractor installed several anchor bolts crooked (10-15 degrees from vertical). The anchors are 1.25" dia x 12" long cast-in anchors loaded in both tension and shear.

Dec 26, 2004 · TX, A307 is what is spificied for the bolts. (mild steel machine bolts). The rebar is being adjusted as opposed to bending the bolts. JLNJ, Re: "acceptable bend ratio"... elsewhere in the plans regarding the "top plate", the SE notes a maximum bend ratio of 2:12 on these bolts. These are also A307. _____

Nov 20, 2002 · The drawings spec'd A325, but the fabricator supplied A307 and they were installed. Now, 25 years later, we discoved this snafu and have discovered that the bolts have yielded some and are causing problems. The bolts cannot be removed and we have been asked to design a retrofit to reduce the stresses in the bolts.

Dec 27, 2006 · A307 bolts are weldable. Don't know about welding the rod to the base plate though. I want to say that AISC does not recommend it. They would prefer a rod extension be full pen welded to the short bolt. What about a T bolt. Essentially a coupling nut with a plate on top.

Oct 12, 2015 · I posted this in your other post - but A307 was used for years as anchor bolts (rods actually). You would never use A325 for embedded anchor bolts. Currently F1554, Grade 36 (or 55) is the proper anchor rod specification. Check out Eng-Tips Forum's Policies here: faq731-376

Oct 12, 2015 · Therefore, A307 or Grade 4.6 anchor bolts are very common and should be used when strong enough, because they are more ductile. J-bolts fabricated in A325 may be available where you are, but I wouldn't trust them because A325 is too brittle to be bent in that way.