Component and Cladding Wind Loads for Low-Slope Roofs on Low-Rise Buildings
Publication: Journal of Structural Engineering
Volume 144, Issue 4
Abstract
The component and cladding wind load provisions for low-sloped roofs on low-rise buildings in ASCE 7-10 were examined using measured pressure data from an aerodynamic database. It was found that both the design pressure coefficients and size of the roof zones in ASCE 7-10 are much smaller in magnitude than indicated by the data. The data indicate that building height is the most significant parameter affecting the size of the roof zones, while plan dimensions have a limited impact on this class of buildings. Recommendations for revised roof zones are developed, which include a modification to the shape of the corner zone, the addition of a new interior zone far from the roof edges, and a zone size definition that depends only on building height. However, even with increased roof zone sizes, the measured data indicate that the design pressure coefficients must also be increased in the corners and edges.
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Acknowledgments
The authors are grateful to the many colleagues on the ASCE 7-16 Wind Loads Subcommittee (WLSC) who provided feedback, comments, and support for this work, particularly, Drs. Tim Reinhold and Peter Vickery who helped with the ballot item on the WLSC, along with Dr. Jon Peterka who provided a detailed, independent review.
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Published In
Journal of Structural Engineering
Volume 144 • Issue 4 • April 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Nov 28, 2016
Accepted: Sep 18, 2017
Published online: Jan 31, 2018
Published in print: Apr 1, 2018
Discussion open until: Jun 30, 2018
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