Improved End Treatment for Metal Beam Guardrail

Buth, C. E.; Hirsch, T. J.

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Improved End Treatment for Metal Beam Guardrail

1977-05-01
By Buth, C. E. ; Hirsch, T. J.

File Language:

English

Details

Creators:

Buth, C. E. ; Hirsch, T. J.
Corporate Creators:

Texas Transportation Institute. Texas A&M University
Corporate Contributors:

Texas State Department of Highways and Public Transportation ; United States. Department of Transportation. Federal Highway Administration
Subject/TRT Terms:

Barriers (Roads) Beams Crash Tests Guardrails Traffic Traffic Safety
Publication/ Report Number:

TTI-2-10-76-189-1F
Resource Type:

Tech Report
Geographical Coverage:

Texas ; United States
Edition:

Final Report: September 1975 - August 1977
Corporate Publisher:

Texas Transportation Institute. Texas A&M University
Abstract:

Since Texas and many other states have literally thousands of turned down end guardrails installed on their highways, Texas Transportation Institute and Texas highway engineers have been seeking a relatively simple method of modifying the turned down end treatment which would eliminate or greatly minimize the probability of a vehicle ramping and rolling over. Recent tests conducted by the Texas Transportation Institute indicate that a relatively simple solution has been found. To modify the standard rail the 5/8-inch diameter bolts were removed from the first five (5) posts. With these bolts removed the rail will drop to the ground when the turned down terminal piece is struck by a vehicle. This action eliminates the undesirable vehicle ramp and rollover behavior. In order to hold the rail at the proper height (27 inches in Texas) before and during vehicle angle impact along the "length of need", "back-up plates" are bolted to the first five (5) posts. The test program includes the four (4) crash tests recommended by NCHRP 153 for longitudinal barrier terminals and two other additional tests. All tests have been successful, and no vehicle rollover has resulted.
Format:

PDF
Funding:

2-10-76-189
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:fd42340df126561728ef3a531e79c844c3f47c2226fe3600282967d731c1cc3876ae45909f25ae4dec90cced3227be4f907c3ce3b83ff616647820dc67e32a44
Download URL:

https://rosap.ntl.bts.gov/view/dot/84824/dot_84824_DS1.pdf
File Type:

[PDF - 7.60 MB ]

File Language:

English

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