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.
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1. Report No.
FHWA-RD-99-065
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2.
Government Accession No. |
3.
Recipient's Catalog No. |
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4. Title and Subtitle
NCHRP Report 350 Test 4-12 of the Modified Thrie Beam Guardrail
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5. Report Date
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6. Performing Organization
Code
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7. Author(s)
C. Eugene Buth and Wanda L. Menges
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8. Performing Organization
Report No.
404211-5
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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)
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11. Contract or Grant
No.
DTFH61-97-C-0039
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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
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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
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20.
Security Classification (of this page)
Unclassified
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21. No. of Pages
39
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22. Price
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