MASH 2016 Evaluation of the Modified Thrie Beam System

Report Number(s): TRP-03-417-20


The test installation for 3-11 consisted of a 176-ft – 9/16-in. long modified thrie beam guardrail supported by 29 posts. Design details for test no. MTB-1 are shown in Figure 11 through Figure 23. W6x8.5 posts fabricated from A36 steel were selected for the tested system. The test installation for 3-10 consisted of a 176-ft – ½-in. long, dual-sided modified thrie beam guardrail supported by 33 posts.

Test Level: 3

System Type: Both single-sided roadside configuration and dual-sided median configuration.

MASH Test Number: 3-10, 3-11

Proprietary/Non-proprietary: Non-proprietary

Pass/Fail: Pass

Evaluation: Full-Scale Crash Testing

Sponsor: New Jersey Department of Transportation

Test Article Description

Height: 34"

Rail Type: Thrie Beam

Rail Thickness: 12-Gauge

Post Type: W6 x 8.5

Material: Steel

Post Spacing: 6' 3"

Blockout Type: Steel

Aesthetic: No

Special Configuration: Single-sided roadside configuration and a dual-sided median configuration