Category Archives: Anchor Bolt Specifications and Substitution

Does stock all thread rod meet ASTM F1554 Grade 36?

Typically, commercially available mild steel all thread rod will not meet the requirements of F1554 grade 36. Most all thread rod that is readily available in the marketplace will typically meet the requirements of ASTM A307 Grade A. The difference between these two specifications is that F1554 Grade 36 anchor bolts have a minimum requirement for reduction of area (a value associated with the steel’s ductility), whereas A307 does not. Therefore, the test reports that accompany A307 all thread rod will not contain a reduction of area value and therefore cannot be certified to meet F1554 grade 36.

Portland Bolt stocks domestically manufactured mild steel all thread rod conforming to F1554 Grade 36, both black and galvanized, that has undergone reduction of area testing, and these values are reported on the accompanying test reports.

Will stock A307 Grade A hex bolts meet the requirements of F1554 Grade 36?

Imported A307 hex bolts will not meet the requirements of F1554 Grade 36 for the same reason that all thread rod typically doesn’t meet F1554 Grade 36; The test reports are missing reduction of area values. Additionally, imported mild steel hex bolts typically do not have a reported yield strength value, which is a requirement of F1554 Grade 36, but not A307 Grade A.

Portland Bolt stocks a line of galvanized F1554 Grade 36 hex head anchor bolts from 3/4” diameter through 1” diameter in lengths to 36”. We also stock headed blanks in other diameters that can be cut to length, threaded, and galvanized quickly to meet your delivery schedule.

Can A193 Grade B7 be substituted for F1554 grade 55?

No. All F1554 anchor bolt grades have a maximum strength requirement. A193 grade B7, which is readily available as all thread rod, possesses a minimum tensile strength requirement that exceeds the maximum tensile strength of F1554 grade 55. Therefore, this is not an acceptable substitution. When it comes to galvanized anchor bolts, stronger is not always better, and one should not assume that a bolt that exceeds the strength requirement of the specified product can be substituted without the engineer’s approval.