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Ultrasonic Testing of Anchor Bolts

In the January 2016 edition of The NDT Technician, the author provided a review of ultrasonic testing (UT) for bolts and pins. In this article, the author will build upon the first article with an in-depth review of the ultrasonic testing of steel anchor bolts on highway signs and traffic signals. His experience working with three different state departments of transportation led him to write this article based on his experience and research working with cantilever signs.


ASTM, 2018, ASTM F1554-18: Standard Specification for Anchor Bolts, Steel, 36, 55, and 105-ksi Yield Strength, ASTM International, West Conshokocken, PA, Figure 1, Paragraphs 18 and S3.

Garlich, Michael J., and Eric T. Thorkildsen, 2005, FHWA NHI 05-036: Guidelines for the Installation, Inspection, Maintenance and Repair of Structural Supports for Highway Signs, Luminaires, and Traffic Signals, Federal Highway Administration, Washington, DC, pp. 1, 6, 7, 32, 33, 35, and 80.

SSTC, 2016, Structural Bolting Handbook 2016, Steel Structures Technology Center Inc., Howell, MI, pp. 111 and 132.

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