Located in Tornado Alley, ROOFTECH has evaluated 100s of tornado damaged facilities. Mr. Patterson was a Civil/Structural Engineering student at Texas Tech University when an F5 tornado struck Downtown Lubbock, Texas and Texas Tech. His professors became world renowned wind experts as the result of studies they performed on buildings like the Great Plains Life Building and others. One of Mr. Patterson’s professors and mentors, Dr. Jim McDonald, would later be one of the peer-reviewers of the first edition of Mr. Patterson’s Wind Uplift Pressures on Low-Slope Roofs. In 2000, an F-2 tornado struck the central business district of Fort Worth, and as a result, ROOFTECH gained extraordinary experience on all types of structures, from residential to high rise office buildings. Patterson’s 5th Edition of Wind Pressures on Low Slope Roofing, due for publication in 2023 includes, for the first time, a chapter on wind uplift loads and design requirements associated with tornados.