FULL-SCALE 5,400 LB VEHICLE CRASH TEST ON THE IOWA W-BEAM APPROACH GUARDRAIL TO THE CONCRETE SAFETY SHAPE BRIDGE RAIL

One full-scale vehicle crash test was conducted on the Iowa W-Beam Approach Guardrail Transition Section to the Concrete Safety Shape Bridge Rail. Test I6-1 was conducted with a 5,420 lb (2459 kg) vehicle at 20.0 deg and 61.45 mph (98.9 km/h). The overall test length of the installation was 64 ft 6 3/4 in. (19.68 m). The installation consisted of four major components: (1) concrete safety shape, bridge rail end-section, (2) the W-beam approach guardrail section, (3) the W-beam breakaway end anchorage, and (4) the W-beam terminal connector. The concrete end-section was 7 ft (2.1 m) long and 2 ft 8 in. (0.81 m) high. A 6-in. (0.15-m) concrete curb was constructed 13 ft (3.96 m) beyond the end of the concrete end-section. The W-beam approach guardrail section consisted of 62 ft 6 in. (19.05 m) of 12 gauge standard W-beam. The top of the W-beam was installed at a mounting height of 27 in. (0.69 m). The W-beam was supported by 13 timber posts. The design consisted of three 10-in. by 10-in. (0.254 m by 0.254 m) posts, eight 8-in. by 8-in. (0.203 m by 0.203 m) posts, and two 6-in. by 8-in. (0.152 m by 0.203 m) posts. The post spacing between post 1 through 7 and 7 through 13 was 3 ft 1 1/2 in. (0.95 m) and 6 ft 3 in. (1.91 m), respectively. The point of impact was 15 ft (4.57 m) upstream from the end of the concrete end-section between posts 5 and 6. The test was evaluated according to the safety criteria in NCHRP Report 230 and also in the AASHTO guide specifications. The safety performance of the Iowa W-Beam Approach Guardrail Transition Section was determined to be satisfactory.

  • Corporate Authors:

    University of Nebraska, Omaha

    Department of Civil Engineering, 6001 Dodge Street
    Omaha, NE  United States  68182-0178

    Iowa Department of Transportation

    800 Lincoln Way
    Ames, IA  United States  50010

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Faller, R K
    • Ataullah, S
    • Pfeifer, B G
    • Holloway, J C
    • Post, E R
  • Publication Date: 1990-1

Language

  • English

Media Info

  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 75 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00675361
  • Record Type: Publication
  • Report/Paper Numbers: TRP-03-21-90
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Mar 23 1995 12:00AM