Development of Wind Load Criteria for Commercial Roof Edge Metals
Publication: Journal of Architectural Engineering
Volume 24, Issue 3
Abstract
Edge metal covers the majority of commercial roofs to maintain waterproofing. It acts as the first line of defense against wind effects on commercial roofs. First, this article summarizes the in situ measurement site (the Canada Post building located in Vancouver, Canada) and compares the measured pressures with the existing wind standards. This study aimed to develop appropriate wind design pressure coefficients for roof edges, for incorporation in the National Building Code of Canada (NBCC). During this process, the following observations were made: (a) Comparison of the in situ measured pressures with existing wind standards suggested that design specifications on wind loads acting on roof edge metal systems in current building codes and standards are not adequate; (b) a systematic procedure to calculate code-comparable pressure coefficients from the in situ measured data is a challenging process; (c) correlation exists between edge metal design coefficients with those of the roof, to simplify the components and cladding design process.
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Acknowledgments
This research and development work was carried out under the auspices of the Natural Sciences and Engineering Research Council’s Collaborative Research Grant (CDR–395869). Thanks are due to the industrial partners—Firestone Building Products, JRS Engineering Group, Menzies Metal Products, Metal-Era, Roofing Contractors Association of BC, and Soprema—for their contributions, including the supply of coping configurations. The authors also acknowledge the assistance of National Resource Council Technical Officers Steven Ko, Amor Duric, David Van Reenen, Aarti Singla, and Maha Dabas. Material requirements were coordinated by Carlisle Syntech, and sensor installation and repairs were completed by Marine Roofing. Access to the building was graciously given by Canada Post, and the authors appreciate the help of Michael Bryson, Alan Shopland, and Reyes Ronald of JLL for coordinating the access, as well as Larry Lemke from Marine Roofing.
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Information & Authors
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Published In
Journal of Architectural Engineering
Volume 24 • Issue 3 • September 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Feb 3, 2017
Accepted: Dec 8, 2017
Published online: Apr 26, 2018
Published in print: Sep 1, 2018
Discussion open until: Sep 26, 2018
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