Snow-Load Drifting – Current Provisions & Future Directions

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

Speaker:

Michael O’Rourke, Ph.D., P.E., 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.

NCSEA Webinars and Digital Events Cancellation and Refund Policies

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.

By Registrant/Attendee: Cancellations must be made at least 24 hours in advance of the webinar (or the first webinar in the case of a series or bundle) and in writing via email ( ncsea@ncsea.com) with the subject line “NCSEA Webinar Cancellation” and include the following in the body of the email: Title of Webinar, Order/Invoice Number, Name of Registrant, and Reason for Cancellation. No telephone refund requests will be accepted.

If the request has been approved, NCSEA can do one of the following:

• Refund the amount back to the original order payment method (a $25 cancellation processing fee will be assessed)

• Issue a full credit on the purchaser’s account that can be used towards a future webinar/event.

If you are unable to attend the webinar and the cancellation deadline has passed, a recording will be available (in most cases) in the Education Portal after the webinar has concluded.
Refunds are not granted due to attendee technology issues. It is your responsibility as the webinar attendee to test your computer setup prior to the start of the webinar.

On-Demand Purchases
All on-demand (recorded) webinars, courses, and series sales are final.