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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
LS-04 NCHRP 350 Akron Foundry Luminaire Supports Reaffirmation of TB1 bases, 10.5" to 15" BC
LS-01A NCHRP 350 Sherman International Luminaire Supports Extend acceptance to range of poles
SS-07 NCHRP 350 Sign Supports, Mailboxes, and Delineator Posts Wisconsin Large Sign Support System - slip base w/no upper hinge, sign attachment clips provide for release, W12x22 posts tested
LS-02 NCHRP 350 Akron Foundry Luminaire Supports TB Series AL Transformer (TB1-AF 1315-17 and modifications) (See ls4)
LS-03 NCHRP 350 Union Metal Luminaire Supports Cast Aluminum Base A2940, 14.5" BC
LS-01 NCHRP 350 Sherman International Luminaire Supports Fiberglass Luminaire Support MB 36-D-50-56
SS-06 NCHRP 350 Minute Man Anchors, Inc. Sign Supports, Mailboxes, and Delineator Posts Breakaway coupling for use with steel flanged channel supports. **
CC-08 NCHRP 350 Syro Steel Co. Barrier Terminals and Crash Cushions C.A.T. Median Barrier Terminal or Impact Attenuator (Experimental) V.A.T. Update (Experimental)
SS-05 NCHRP 350 Sign Supports, Mailboxes, and Delineator Posts a. Perforated square steel tube - 2 x 2 in. x 0.105 wall thick. max size.**

b. Single 3 lb/ft steel U-post. **

c. Dual 3 lb/ft steel U-post. **

d. Ariz. dual legged slip base S4x7.7 post

e. Texas dual leg slip base, W12x45 post

f. to g. repeated SS-1 to SS-4 above
B-13 NCHRP 350 TAPCO Longitudinal Barriers and Bridge Rails V-LOC Mailbox Support System