Initial Studies of a Flexural Member Composed of Glass-Fiber Reinforced Polyester Resin

Report No: 73-R3

Published in 1973

About the report:

An investigation was conducted of the structural behavior of a flexural member composed entirely of glass-fiber reinforced polyester resin. Three experimental girders were fabricated and load-tested in the laboratory. The physical characteristics of the members included a triangular cross section, a top flange built up with preformed shapes, a combination of plates and trussed strands for web elements and a lower chord consisting of multiple strands of resin-impregnated glass fibers. It was found that experimental deflections and strains were reasonably well predicted for the members by conventional analytical procedure for relatively small loads. Ultimate strength tests were precluded by failures of connections at the top flange joints. Recommendations are presented for subsequent investigations of reinforced plastic structural members.

Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.


  • Fred C. McCormick

Last updated: February 7, 2024

Alert Icon

Please note that this file is not ADA compliant. Choose one of below options: