Report Concludes Oakland Bay Bridge Anchor Rods Manufactured by Dyson Corporation were not Defective - Dyson Corp President Breaks his Silence

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In a detailed 55-page metallurgical testing and fracture analysis report conducted by leading industry experts and commissioned by Oakland Bay Bridge engineering firm, Caltrans, and general contractor, American Bridge/Fluor, anchor rods manufactured by The Dyson Corp were determined not to be defective.

Through this report and mutual internal investigations, it was concluded that The Dyson Corporation met its requirements to manufacturing anchor rods to the specifications requested.

The report stated that ‘the steel rods comply with the basic mechanical and chemical requirements of ASTM A354 grade BD.” ASTM A354 is an international standard developed by ASTM International, (formerly known as The American Society for Testing and Materials), that provides definitions for mechanical and chemical properties for alloy steel threaded fasteners. ASTM International is the largest developer of standards in the world. ASTM A354 BD was the standard specified by Oakland Bay Bridge engineers for the bridge anchor rods to be manufactured by Dyson Corp. As a result of the report, an upgraded standard has been recommended for manufacturing replacement anchor bolts.

“The Dyson Corporation is a manufacturer of large fasteners for critical infrastructure in a wide variety of industries including nuclear, military, and alternative energy. We produce products to very precise international standards that are specified by our customer’s engineers,” stated Brian Rawson, president of The Dyson Corporation. “Through this report and mutual internal investigations, it was concluded that The Dyson Corporation met its requirements to manufacturing anchor rods to the specifications requested,” he concluded.

The entire report as well as Mr. Rawson’s full video statement is available by visiting

For more than 125 years, Dyson has specialized in large domestic forged bolts, nuts, socket head cap screws, lock nuts, and construction fasteners used in transportation infrastructure of bridges, railroads and waterways, the fossil fuel industries of mining and power generation, shipbuilding and nuclear power, and the original equipment manufacturer (OEM) supply chain.

About The Dyson Corporation

In 1884, Joseph Dyson founded The Dyson Corporation in Cleveland as a specialty forge shop. Mr. Dyson produced small forgings for various industries. Responding to customer demand, Mr. Dyson soon developed the capability to manufacture larger fasteners and forgings, as well as fork arms for the material handling industry.

Today, forgings made at the Painesville, Ohio plant range in size from one half to 10,000 pounds. Equipment includes a combination of hammers, mechanical and hydraulic presses, upsetters, benders, and state-of-the-art hot part formers with in-line heat-treating.

In addition, the company’s extensive computer numerical controlled (CNC) turning and milling operations, and the considerable thread rolling, drilling and tapping capability; have helped Dyson develop into a premier critical fastener manufacturer. Dyson is producing fasteners to various specifications, including American Society of Mechanical Engineers (ASME) and the American National Standards Institute (ANSI), and it is servicing critical component markets, such as military, alternative energy, infrastructure, and nuclear power. For more information, contact Dyson at 800- 680-3600 or The Dyson Corporation.

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Tom Mitchell
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