344-20th Street
Suite 360
Oakland, CA, USA
94612-3593
1-510-832-5606
Fax 1-510-832-2436
www.liftech.net
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Liftech provided design assistance and review services to American Bridge/Fluor Enterprises for procurement of the shear leg derrick that arrived in the San Francisco Bay Area on March 12, 2009. Fabricated at ZPMC in China, the derrick will be used to erect the major components of the San Francisco-Oakland Bay Bridge self-anchored suspension span. The crane equipment will be responsible for placing all self-anchored suspension bridge deck sections as well as the lower portions of the new span's tower.
Anna Maria Dix, P.E., a structural designer at Liftech Consultants Inc. in Oakland, California, has contributed to the development of the design process for the “ductile link” tie-down system used on dockside container cranes. In hurricane and typhoon regions, extreme winds cause cranes to collapse, costing millions of dollars in damages. The system allows ductile redistribution of tie-down forces, greatly improving the structure's ability to resist extreme winds. The system is now widely used worldwide. She has also been involved in a fatigue study and report for Zhenhua Port Machinery Company, the world's largest manufacturer of dockside container cranes, to determine the possible causes for chronic unexpected fatigue cracking.
Dix holds a bachelor's degree in civil engineering from Virginia Tech and a master's in civil engineering from the University of California, Berkeley. She is active with the Structural Engineers Association of Northern California in their Young Member Forum and outreach activities.