TRB Webinar: Using 0.7-inch Strands for Better Bridge Design

This webinar was posted on 01/28/2023

March 20, 2023 03:00 PM - 04:00 PM U.S. Eastern
Cost (for your seat)
Professional Development Hours for this webinar
1.00 hour(s)
Continuing Education Hours for this webinar
AAE: 0.00 hour(s)
AICP: 0.00 hour(s)
CLE: 0.00 hour(s)

For the first time, AASHTO Load-and-Resistance Factor Design (LRFD) Bridge Design Specifications will permit the use of 0.7-inch strands. The use of 0.7-inch strands could cut down on the number of strands in a girder, reduce the number of girders in a bridge, achieve longer spans, and allow the use of shallower girders for the same span length. TRB hosted a webinar on Monday, March 20, 2023 from 3:00 PM to 4:00 PM Eastern that presented the results of a multi-year, multi-organizational research program leading to AASHTO’s revision. Presenters discussed the benefits and considerations of moving to 0.7-inch strands, compared to 0.6-inch strands. Presenters also shared the challenges to application and special attention to end region detailing.

This webinar is based on NCHRP Research Report 994: Use of 0.7-in. Diameter Strands in Precast Pretensioned Girders.

This webinar was sponsored by TRB’s National Cooperative Highway Research Program.

The slides are available. Please contact for a link to the recording. There may be a $50 fee.


Webinar agenda and presenters

  1. Design case studies and overview of full-scale girder tests – Bahram Shahrooz, University of Cincinnati

  2. End region detailing and stability considerations – Kent Harries, University of Pittsburgh

  3. Question and answer session moderated by Richard Miller, University of Cincinnati

The first 40 minutes of the webinar will be for presentations and the final 20 minutes will be reserved for audience questions.


Learning Objectives

At the end of this webinar, participants will be able to:

  1. Determine the cases for which 0.7-inch strands offer advantages over 0.6-inch strands

  2. Detail the end regions when 0.7-inch strands are used

  3. Identify the research leading to the revisions to AASHTO LRFD Bridge Design Specifications


Professional Development Hours

This webinar was delivered as a scheduled – e-learning live event and is categorized within RCEP as Technical, Health and Safety.

Professional Development Hours (PDHs) earned on completion of this program were reported to the Registered Continuing Education Program (RCEP). Certificates of Completion are issued to all participants via the online system. Complaints about registered providers may be addressed to RCEP, 1015 15th Street, NW, 8th Fl., Washington, DC, 20005.