Are ASTM F1554 Grade 55 anchor rods > 2” in diameter a ‘ductile steel element’ per ACI 318-05 Appendix D.1?

According to ACI 318-05 Appendix D.1, a “Ductile Steel Element” is an element with a tensile test elongation of at least 14 percent and reduction in area of at least 30 percent. The minimum elongation percentage for any diameter of F1554 Grade 55 anchor rod is 21%. Therefore, any diameter of Grade 55 anchor rod would exceed the ACI elongation requirement for a “Ductile Steel Element”. However, the minimum reduction in area percentage requirement for an F1554 Grade 55 anchor rods greater than 2” diameter is 22, 20, or 18, depending on diameter. Since these values fall well below the 30% requirement, they would not be considered a “Ductile Steel Element” according to The American Concrete Institute. Although the elongation requirement would be met, the reduction in area requirement is not. Refer to our ASTM F1554 Summary Page for complete mechanical requirements for the F1554 specification.

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