Seismic Retrofit Aug, 2003 By David L. McCormick S.E., P.E., SECB In Feature Strengthening Tilt-Up Structures This article is currently only available in PDF format, please click the link to the top right. About the author ⁄ David L. McCormick S.E., P.E., SECBDavid L. McCormick is a Senior Principal at Simpson Gumpertz & Heger in San Francisco. (dlmccormick@sgh.com) Prev Trial Designs Next Rebar Locators