
Education Webinar
Design, Construction, and Performance of Two-Way Conventionally Reinforced Concrete Slabs
November 6, 2025 | Thu 12:00 America/Chicago
Duration: 1.25 Hours
CE Credits: 1.25
$300
Two-way, conventionally reinforced concrete slabs have a predictable propensity to crack and deflect. Design provisions, particularly those related to minimum thickness and strip design methods, have not changed substantively for many code cycles and allow engineers to exercise broad discretion during the design process within certain prescribed limitations. The exercise of discretion leads to some designs falling toward the margins of permissible design limitations and others landing more squarely within the margins. This webinar will show the range of in-field behaviors exhibited by code-compliant designs and will provide straightforward explanations for common radial and spiderweb cracking and out-of-levelness that are likely to exceed expectations. The presentation will also include discussion of common errors in design and construction and the need for more detailed precautionary code commentary to inform engineers about declining serviceability as designs approach permissible design limitations. It will also include recommendations for designers to achieve more robust designs that perform closer to the expectations of owners, occupants, and engineers.
- Course will award 1.25 hour of continuing education
- This course is Diamond Review approved in 49 states. New York does not accept hours from recordings.
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Two-way, conventionally reinforced concrete slabs have a predictable propensity to crack and deflect. Design provisions, particularly those related to minimum thickness and strip design methods, have not changed substantively for many code cycles and allow engineers to exercise broad discretion during the design process within certain prescribed limitations. The exercise of discretion leads to some designs falling toward the margins of permissible design limitations and others landing more squarely within the margins. This webinar will show the range of in-field behaviors exhibited by code-compliant designs and will provide straightforward explanations for common radial and spiderweb cracking and out-of-levelness that are likely to exceed expectations. The presentation will also include discussion of common errors in design and construction and the need for more detailed precautionary code commentary to inform engineers about declining serviceability as designs approach permissible design limitations. It will also include recommendations for designers to achieve more robust designs that perform closer to the expectations of owners, occupants, and engineers.
- Course will award 1.25 hour of continuing education
- This course is Diamond Review approved in 49 states. New York does not accept hours from recordings.
Speakers:

Gwenyth Searer, P.E., S.E., is a Principal at Wiss, Janney, Elstner Associates, Inc. She is a licensed structural engineer in six western states. She has 30 years of experience and is the Chair of the SEAOC Wind Committee.

Terrence Paret is a Senior Principal at WJE and has been employed there for 37 years. He was a keynote speaker at the 2017 NCSEA Summit at which he presented on the assessment and repair of damage to the Washington Monument and Washington National Cathedral after the 2011 Mineral earthquake, and he was the project manager of the seismic assessment and strengthening of Sherith Israel, which was given one of NCSEA’s 2018 Outstanding Project Winner Award in the Category of Forensic/Renovation/Retrofit/Rehabilitation Structures.
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.
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