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Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations

This report is an archived publication and may contain dated technical, contact, and link information
Publication Number: FHWA-RD-99-061
Date: December 1998

NCHRP Report 350 Test 3-11 of the Strong Wood Post Thrie Beam Guardrail




This report will be of interest to researchers and those State and local highway officials who select, locate, and design traffic barriers. It documents the results of a crash test of a strong wood post thrie beam guardrail with a 2000-kg pickup truck impacting at a nominal speed and angle of 100 km/h and 25 degrees. This is the strength test for Test Level Three (TL-3) in NCHRP Report 350. It was found that the test results met all of the evaluation criteria. The pickup truck was smoothly redirected and remained upright.

Michael F. Trentacoste
Michael F. Trentacoste
Director, Office of Safety Research and Development


Dynamic Evaluation of the New FOIL Instrumented Rigid Pole: FOIL Test Numbers 96F008 Through 96F015

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1. Report No.


2. Government Accession No. 3. Recipient's Catalog No.
4. Title and Subtitle

NCHRP Report 350 Test 3–11 of the Strong Wood Post Thrie Beam Guardrail

5. Report Date
6. Performing Organization Code
7. Author(s)

C. Eugene Buth and Wanda L. Menges

8. Performing Organization Report No.
9. Performing Organization Name and Address

Texas Transportation Institute
The Texas A&M University System
College Station, Texas 77843–3135

10. Work Unit No. (TRAIS)


11. Contract or Grant No.


12. Sponsoring Agency Name and Address

Office of Safety and Traffic
Operations Research and
Federal Highway Administration
6300 Georgetown Pike
McLean, Virginia 22101–2296

13. Type of Report and Period Covered

Test Report
July 1997 – July 1998

14. Sponsoring Agency Code
15. Supplementary Notes

Contracting Officer's Technical Representative (COTR) – Richard King, HSR–20

16. Abstract

Officials at the Federal Highway Administration (FHWA) decided that the strong wood post thrie beam guardrail should be tested to test level three (TL–3). The test performed (test designation 3–11) involves the 2000P (pickup truck) traveling at a nominal speed and angle of 100 km/h and 25 degrees impacting the critical impact point. This test is intended to evaluate the strength of the section in containing and redirecting the pickup truck.

This report presents the details and results of National Cooperative Highway Research Program (NCHRP) Report 350 test destination 3–11 for evaluation of the strong wood post thrie beam to TL–3. The strong wood post thrie beam guardrail met all required criteria for NCHRP Report 350 test designation 3–11.

17. Key Words

Guardrail, heavy vehicles, single–unit truck, crash testing, roadside safety.

18. Distribution Statement

No restrictions. This document is available to the public through the National Technical Information Service, 5285 Port Royal Road, Springfield, VA 22161.

19. Security Classification (of this report)


20. Security Classification (of this page)


21. No. of Pages


22. Price

Form DOT F 1700.7 (8-72) Reproduction of completed page authorized



Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000
Turner-Fairbank Highway Research Center | 6300 Georgetown Pike | McLean, VA | 22101