MASH test 3-21 on TL-3 thrie beam transition without curb.

Details

• Creators:
  Arrington, Dusty R. ; Bligh, Roger P. ; Menges, Wanda L.
• Corporate Creators:
  Texas A&M Transportation Institute
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Thrie beams
  • Guardrail transition sections
  • Curbs
  • Impact tests
  • Guardrails
  • Performance tests
  • Highway safety
  • Median barriers
• Publication/ Report Number:
  FHWA/TX-13/9-1002-12-3
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Corporate Publisher:
  Texas. Dept. of Transportation. Research and Technology Implementation Office
• NTL Classification:
  NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures ; NTL-SAFETY AND SECURITY-Highway Safety
• Abstract:
  This project evaluated the impact performance of a modified TxDOT thrie beam transition to rigid ; concrete barrier without a curb element below the transition rail. In a previous test described in TxDOT ; Research Report 0-4564, a thrie beam transition without curb failed to meet NCHRP Report 350 performance ; criteria. However, it could not be discerned whether the vehicle instability observed in that test was ; attributable to the missing curb or the rotation of the thrie beam transition rail into the sloped face of the ; concrete safety shape rail at the bridge end connection point. ; A transition design without curb would reduce the complexity of the field installations and would ; provide an option for dealing with different drainage requirements at bridge ends. A fabricated steel ; blockout was incorporated into the transition system to keep the thrie beam rail and terminal connector in a ; vertical plane at its connection to the concrete bridge rail. ; The modified thrie beam transition without curb failed to meet MASH TL-3 requirements due to ; rollover of the impacting vehicle. Further discussions as to the possible cause of the failure are described ; within the report.
  More +
• Format:
  PDF
• Funding:
  Project 9-1002-12
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26277/dot_26277_DS1.pdf
• File Type:
  [PDF - 8.69 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:dfad9c6b78153ae89b4b24f4720ed6873521a4c933f298c67f53d085544d7746