Development of a Standardized Buttress for Approach Guardrail Transitions

Report Number(s): TRP-03-369-20

Description: The barrier system installation was approximately 82 ft long and consisted of four main components: a concrete transition buttress, a thrie-beam AGT, standard MGS, and a guardrail anchorage system. The downstream end had concrete buttress. The buttress was 7 ft long and 36 in. tall. To prevent vehicle snag above the thrie beam rail, the upstream end of the buttress was 32 in. tall and incorporated a 4-in. tall by 24-in. long slope to bring the barrier height up to 36 in.

Test Level: 3

System Type: Guardrail to Concrete

MASH Test Number: 3-21

Proprietary/Non-proprietary: Non-proprietary

Pass/Fail: Pass

Evaluation: Testing + Engineering Analysis

Sponsor: Midwest Pooled Fund Program

Test Article Description

Transition Type: Thrie Beam

Nested: Yes

Rubrail: No

Rubrail Nested: No

Height: 31"

Curb Present: Yes