MASH Test 2-11 on W-Beam Guardrail with Modified Special Steel Posts for Concrete Structure Mount

Report Number(s): 611971-01

Description: The installation consisted of a W-beam guardrail system with a central weak post section that was mounted on a concrete storm sewer drop inlet and sidewalk (located downstream of the inlet). The installation included a curb which transitioned into the curb inlet. The installation was 156 ft 3 inches long, with the top of the W-beam rail at approximately 31 inches above grade. The concrete structure mount post section spanned from post 10 through 12. These posts incorporated designed Option 3 discussed in the pervious chapters. Posts 10 through 14 had HSS 8x4x1/4 blockouts. The W-beam was attached to posts 15, 16, and 17 with W-beam backups places and no blockouts. Other W6x8.5 posts in the installation incorporated standard 8-inch deep timber blockouts. Post 9 was an exception, as it employed two 8-inch timber blockouts in tandem to avoid interference with the drop inlet paving.

Test Level: 2

MASH Test Number: 2-11

Proprietary/Non-proprietary: Non-proprietary

Pass/Fail: Pass

Evaluation: Full-Scale Crash Testing

Sponsor: Roadside Safety Pooled Fund