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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
LS-09 NCHRP 350 Akron Foundry Luminaire Supports TB-2 and TB-3 Al Transformer Bases (TB-2 B.C. increased via ls15)
LS-08 NCHRP 350 Transpo Industries Luminaire Supports Pole-Safe breakaway couplings for Conventional luminaire supports weighing no more than 900#.
SS-17 NCHRP 350 Transpo Industries Sign Supports, Mailboxes, and Delineator Posts Type A and Type B breakaway couplings.(If installed by direct burial, then Type AUX for S-1 soil only.)
(Posts limited to 45 #/ft below the hinge.)
CC-13A NCHRP 350 Energy Absorption Systems, Inc. Barrier Terminals and Crash Cushions Brakemaster (Experimental) (Letter of 1/3/90 qualifies device for roadside as well as for median use
SS-16 NCHRP 350 Minute Man Breakaway Sign Supports, Mailboxes, and Delineator Posts MMB-1HD breakaway device for use with 3 #/ft. steel flanged channel "U"-posts.
SS-15 NCHRP 350 Sign Supports, Mailboxes, and Delineator Posts Single 3" and 4" diameter Aluminum, 3/16" wall, direct burial tube. **
B-11 NCHRP 350 International Barrier Corp. Longitudinal Barriers and Bridge Rails MK-7HV Cement-Stabilized Sand Filled Barrier (normal profile IBC barrier) (Experimental)
LS-07 NCHRP 350 Shakespeare Products Luminaire Supports Fiberglass poles, series AA,AB,AC,AD on Transpo Safety 201 or 301couplings. Pole heights of 39' to 47'.
CC-13 NCHRP 350 Energy Absorption Systems, Inc. Barrier Terminals and Crash Cushions Brakemaster (Experimental) (Letter of 1/3/90 qualifies device for roadside as well as for median use
SS-14 NCHRP 350 Marion Steel Sign Supports, Mailboxes, and Delineator Posts Rib-Bak Post with Minuteman Coupling **