Wood Roof Detailing for Wind Uplift
by John "Buddy" Showalter, P.E., M.ASCE
August 10, 2022; 11:00 AM - 1:00 PM Pacific TimeSmall Business System Requirements FAQ Register
ICC Preferred Provider Course Number: 32696
Component and cladding (C&C) wind pressures calculated using ASCE 7-16, Minimum Design Loads and Associated Criteria for Buildings and Other Structures, increased over ASCE 7-10 C&C wind loads. Between the increase of C&C roof areas assigned to corner and edge regions and the increase in C&C roof pressures, nail spacings for wood structural panels (WSP) are significantly reduced in some cases. Uplift connectors for gable endwall rake overhang outlookers to the endwall require engineering or can be sized based on prescriptive tables to account for increased C&C loads at roof edges. Uplift connectors at rafter or truss bearings are based on main wind force resisting system (MWFRS) loads. MWFRS loads did not change in ASCE 7-16. The International Building Code® (IBC) and other referenced standards have uplift connection load tables that can be used to size roof-to-wall uplift connections.
Buddy Showalter is a senior staff engineer with the International Code Council's (ICC) product development group. He develops technical resources in support of the structural provisions of the International Building Code and International Residential Code. Showalter reviews publications authored by the Code Council and engineering groups, while also developing publications and technical seminars on the structural provisions of the International Codes for building departments, designers and special inspectors. He is the project lead in the development of Mass Timber Buildings and the IBC and associated education programs, jointly developed by ICC and the American Wood Council (AWC). A graduate of Virginia Tech, Showalter has also been a member of the editorial board for STRUCTURE magazine for more than 15 years. Before joining ICC, Showalter spent 26 years with AWC where he led its technology transfer program with oversight responsibility for publications, website, helpdesk, education and other technical media. He has more than 35 years of experience in the development and support of building codes and standards, publishing more than 60 technical articles for industry-related trade journals.
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