Snow-Load Drifting - Current Provisions & Future Directions

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Description

The webinar will provide a detailed review the current ASCE 7 provisions for snow drift loading as well as expected future improvements. The current provisions to be covered include windward and leeward roof step drifts, unbalanced drift loads on gable roofs, as well as snow drifting at parapet walls, RTUs, and atop adjacent structures. Special attention will be paid to the mechanical basis for various geometric characteristics of these drifts.

The webinar will conclude with a discussion of three likely improvements to the ASCE 7 drift load provisions. The first is revision of the windward drift relations based upon recent Norwegian observations. The Norwegian observations lead to relations for wall heights capable of capturing snow flux and thereby preventing downwind drift formation. The final likely improvement relates to regional differences in “winter windiness” and resulting differences in expected drift size.

Course will award 1.5 hours of continuing education
Diamond Review approved in all 50 states

Contributors

Michael O'Rourke, Ph.D., P.E.

Michael O’Rourke, P.E., Ph.D., was Professor of Civil Engineering at Rensselaer 1974 to 2021 . He chaired of the Snow and Rain Load subcommittee for ASCE 7 from 1997 to 2017. He is the author of the soon to be released ASCE Press Guide to the Snow Load Provisions of ASCE 7-22.

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Webinar Cancellation

By NCSEA: If a webinar is canceled by NCSEA, all registered attendees will be notified via email. NCSEA will issue a full refund if the event cannot be rescheduled. If the event is rescheduled and a registrant can not attend on the rescheduled date, NCSEA will offer a credit in the amount of the purchase price.

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Description

Contributors

Michael O'Rourke, Ph.D., P.E.