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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 Testing Manufacturer Hardware Type Device Description
WZ-130 NCHRP 350 Sign Up Corporation Work Zone Devices X-Cell 48 HDL
SS-91 NCHRP 350 Quickfix Couplers Sign Supports, Mailboxes, and Delineator Posts Cast Aluminum couplers for single or dual PSST or round pipe posts
WZ-133 NCHRP 350 MWRSF Work Zone Devices Rigid frame portable sign stand
WZ-125 NCHRP 350 Dicke Tool Work Zone Devices Remainder of Phase VI tested stands.
SS-114 Ssquare Tube Products Sign Supports, Mailboxes, and Delineator Posts NEX Tube Mailbox Support
SS-116 NCHRP 350 Valley Forge & Bolt Manufacturing Co. Sign Supports, Mailboxes, and Delineator Posts Use of load indicating fasteners in slip bases
WZ-118 NCHRP 350 Three D Traffic Works Work Zone Devices TD6000 VIP Vertical Panels and TD7000 Ring Top Stackable Cone
SS-115 NCHRP 350 MaxiStrut Sign Supports, Mailboxes, and Delineator Posts T-Top or U-Top to pipe sign support when placed on a standard triangular slip base
B-109 NCHRP 350 Interstate Timber Products Co. Longitudinal Barriers and Bridge Rails Plastic block for strong-post w-beam
CC-36C Impact Absorption, Inc. Barrier Terminals and Crash Cushions Supplemental test (3-52) @ TL-3