This report will be of interest to those State and local highway officials who select, locate, and design traffic barriers. It documents the results of a crash test of a Modified Thrie Beam guardrail with an 8000–kg single unit truck impacting at a nominal speed and angle of 80 km/h and 15 degrees. This is the strength test for Test Level Four (TL–4) in NCHRP Report 350. It was found that the test results met all of the evaluation criteria. The single unit truck was smoothly redirected and remained upright.
Detailed drawings are presented for documentation and to facilitate implementation.
1. Report No. FHWA–RD–99–076 |
2. Government Accession No. |
3. Recipient's Catalog No. |
4. Title and Subtitle
NCHRP Report 350 Test 4-12 of the Modified Thrie Beam Guardrail
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5. Report Date |
6. Performing Organization Code |
7. Author(s) C. Eugene Buth and Wanda L. Menges |
8. Performing Organization Report No. 404211–5 |
9. Performing Organization Name and Address
Texas Transportation Institute
The Texas A&M University System
College Station, Texas 77843–3135
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10. Work Unit No. (TRAIS) |
11. Contract or Grant No. DTFH61–97–C–0039 |
12. Sponsoring Agency Name and Address
Office of Safety and Traffic Operations
Research and
Development
Federal Highway Administration
6300 Georgetown Pike
McLean, Virginia 22101–2296
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13. Type of Report and Period Covered
Test Report
July 1997 – July 1998
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14. Sponsoring Agency Code |
15. Supplementary Notes
Project conducted in cooperation with the Federal Highway Administration.
Research Study Title: Assessment of Existing Roadside Safety Hardware – II
Contracting Officer's Technical Representative (COTR): Charles F. McDevitt – HSR–20
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16. Abstract
The modified thrie beam guardrail has been successfully tested at Test Level 3 (TL–3) of NCHRP Report 350.(3) FHWA decided that the guardrail should
be tested to TL–4, which involves a crash test with the 8000S (single–unit truck) traveling at a nominal speed and angle of 80 km/h and 15
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 NCHRP Report 350 test destination 4–12 for evaluation of the modified thrie beam to TL–4. The
modified thrie beam guardrail met all requirements for NCHRP Report 350 test designation 4–12.
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17. Key Words
Guardrail, heavy vehicles, single-unit truck, crash testing, roadside safety.
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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.
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19. Security Classification (of this report) Unclassified |
20. Security Classification (of this page) Unclassified |
21. No. of Pages 39 |
22. Price |