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FHWA Highway Safety Programs

Archived Hardware Eligibility Letters – NCHRP 350

These letters are archived and are posted for "historical and research purposes only" per the sunset dates in the AASHTO/FHWA Joint Implementation Agreement and exceptions to these dates as posted on the AASHTO Committee on Design website.

Letter Date Sort ascending Testing Manufacturer Hardware Type Device Description
SS-28 NCHRP 350 Sign Supports, Mailboxes, and Delineator Posts 3 ½" Diam. Thin Walled Aluminum Tube
Single Spliced (6" c-c) Marion Steel or Franklin Steel 4 ppf U-channel post
SS-27 NCHRP 350 Montana D.O.T. Sign Supports, Mailboxes, and Delineator Posts Round wood post supports
B-19 NCHRP 350 Nat. Ready Mix Concrete Assn. Longitudinal Barriers and Bridge Rails Ontario "Tall Wall" Concrete Median Barrier
B-18 NCHRP 350 Pelco Products Longitudinal Barriers and Bridge Rails PB-5300 Ser. Cast Aluminum Traffic Signal Base.
SS-26 NCHRP 350 Unistrut Corp. Sign Supports, Mailboxes, and Delineator Posts Telespar square perf. tube small sign supports without sleeve around base post.
B-17 NCHRP 350 (Minute Memo to Regions) Longitudinal Barriers and Bridge Rails Constant Slope Concrete Median Barrier.
SS-13C NCHRP 350 Marion Steel Sign Supports, Mailboxes, and Delineator Posts Project by project acceptance of Florida's splice in both soil types
SS-13B NCHRP 350 Marion Steel Sign Supports, Mailboxes, and Delineator Posts Permit threaded spacers to lap splice design
CC-16 NCHRP 350 Syro Steel Co. Barrier Terminals and Crash Cushions Advanced Dynamic Impact Extension Module (ADIEM), terminal only.
B-16 NCHRP 350 Barrier Systems, Inc. Longitudinal Barriers and Bridge Rails Quickchange Moveable Median Barrier for use in permanent installations