Technical FAQs

ASTM F3125 Grade A325 Anchor Bolts

Can ASTM A325 bolts be used as anchor bolts?

Engineers occasionally specify the use of F3125 Grade A325 heavy hex structural bolts as anchor bolts, but technically they are supposed to be used for structural steel connections only. Part of the problem is that the A325 specification is very specific as to the application and thread length. Because A325 bolts are typically used in... Read more

Bolt Shear Strength Considerations

What is the shear strength of carbon steel bolts?

First, unlike tensile and yield strengths, there are no published shear strength values or requirements for ASTM specifications. The Industrial Fastener Institute (Inch Fastener Standards, 7th ed. 2003. B-8) states that shear strength is approximately 60% of the minimum tensile strength. “As an empirical guide, shear strengths of carbon steel fasteners may be assumed to... Read more

California School Projects

Are roll threaded anchor bolts with a reduced body allowed on school projects in California?

Contrary to popular belief, roll threaded anchor bolts are acceptable for schools in California when connecting steel to concrete. Portland bolt spent three years working with the California Department of General Services Division of the State Architect to dispel the rumor that only full body cut threaded bolts could be used. The link at the... Read more