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-18A | NCHRP 350 | Marion Steel Company | Sign Supports, Mailboxes, and Delineator Posts | Redesigned Rib-Bak | |
| SS-13D | NCHRP 350 | Marion Steel Company | Sign Supports, Mailboxes, and Delineator Posts | Redesigned Rib-Bak | |
| SS-63 | NCHRP 350 | S Square Tube Products | Sign Supports, Mailboxes, and Delineator Posts | Perforated square steel tube sign supports | |
| B-37 | NCHRP 350 | Wyoming DOT | Longitudinal Barriers and Bridge Rails | DOT 2 Bridge Railings (Steel Post & Rail w/ Curb) (TL-3 and TL-4) |
|
| CC-35 | NCHRP 350 | Energy Absorption | Barrier Terminals and Crash Cushions | QUADGUARD Crash Cushion - for unidirectional traffic @ TL-3 | |
| CC-34 | NCHRP 350 | Trinity/SYRO | Barrier Terminals and Crash Cushions | MPS 350 TMA @ TL-2 | |
| SS-62 | NCHRP 350 | Western Highway Products | Sign Supports, Mailboxes, and Delineator Posts | ULTI-MATE perforated square steel tube sign supports | |
| B-36 | NCHRP 350 | Texas A&M (TTI) | Longitudinal Barriers and Bridge Rails | Low-Profile Concrete Barrier for Work Zones | |
| LS-44 | NCHRP 350 | Valmont | Luminaire Supports | Breakaway Coupling / Miniature four-bolt slip base | |
| CC-33 | NCHRP 350 | Trinity/SYRO | Barrier Terminals and Crash Cushions | CAT Terminal/Crash Cushion @ TL-3 |