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-47 | NCHRP 350 | South Dakota DOT | Sign Supports, Mailboxes, and Delineator Posts | Splicing 3PPF Marion post to 4PPF Franklin Stub | |
| B-27 | NCHRP 350 | Collins & Aikman Corp. | Longitudinal Barriers and Bridge Rails | Recycled Blockout for wood-post guardrail | |
| SS-39A | NCHRP 350 | Recycled Plastic Products, Inc. | Sign Supports, Mailboxes, and Delineator Posts | Smaller diameter tubes | |
| CC-22 | NCHRP 350 | Texas Transportation Institute | Barrier Terminals and Crash Cushions | Two Slotted Rail Terminals | |
| CC-18A | NCHRP 350 | Barrier Terminals and Crash Cushions | Supplement accepts it as a median terminal as well. | ||
| CC-21 | NCHRP 350 | Energy Absorption Systems, Inc. | Barrier Terminals and Crash Cushions | Truck Mounted Attenuator | |
| SS-46 | NCHRP 350 | Sign Supports, Mailboxes, and Delineator Posts | Single Unmodified Cedar Post full dimension 4"x6" | ||
| SS-45 | NCHRP 350 | Sign Supports, Mailboxes, and Delineator Posts | Drilled Wood posts in concrete foundations, Pennsylvania designs ** | ||
| CC-16A | NCHRP 350 | Syro Steel Co. | Barrier Terminals and Crash Cushions | Qualifies ADIEM for use as a crash cushion as well. | |
| SS-44 | NCHRP 350 | Unistrut Corp. | Sign Supports, Mailboxes, and Delineator Posts | 14-gage A715 Gr 60 Perf. Square Steel posts * |