BEST DESIGN PRACTICES FOR WOOD FRAME CONSTRUCTION IN TORNADO PRONE AREAS

摘要

An estimated 1,564 tornadoes have ravaged the U.S. in 2011 and caused over 500 fatalities and untold destruction to homes and other light-frame buildings. Tornadoes in the strongest category — EF5 and EF4 on the Enhanced Fujita Scale - caused 75 percent of the deaths. Given the extensive loss of lives and destruction caused by tornadoes, which typically account for nearly 60% of the annual insurance losses, the question does arise about the current design practices for extreme wind loads. This paper addresses the challenges involved in designing tornado resistant homes and the implications of any mandates to make home tornado proof. The best design practices for wood frame construction in tornado prone areas that ensure occupants safety and reduce potential damage are discussed. Emerging technologies for enhancing the performance of residential buildings in these extreme events are also dealt with.