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-31 | NCHRP 350 | Allied Tube and Conduit | Sign Supports, Mailboxes, and Delineator Posts | Single Perforated Square Steel Tube 2 ½" 12 ga in 7 ga anchor | |
| CC-17 | NCHRP 350 | Roadway Safety Service | Barrier Terminals and Crash Cushions | FITCH Sand Barrel Attenuator with "Zip-Strip" Connectors and "Unicore" Sand Support Structure | |
| SS-30A | NCHRP 350 | Hapco Division | Sign Supports, Mailboxes, and Delineator Posts | Extend range of pole heights and correct aluminum spec called for in SS-30 | |
| SS-30 | NCHRP 350 | Hapco Division | Sign Supports, Mailboxes, and Delineator Posts | Cast Aluminum Shoe Base for Motorist Aid Call box Supports | |
| LS-27A | NCHRP 350 | Hapco Division | Luminaire Supports | Change in handhole dimensions | |
| B-20 | NCHRP 350 | Mobil Chemical Company "Timbrex" | Longitudinal Barriers and Bridge Rails | Recycled Blockouts for use on Wood Strong-Post W-Beam Guardrail | |
| LS-28 | NCHRP 350 | Adian Engineering | Luminaire Supports | Adian Breakaway Base for Luminaire Supports Model TB-01, 16" to 17" B | |
| LS-27 | NCHRP 350 | Hapco Division | Luminaire Supports | Breakaway Aluminum Shoe Base, 11" BC | |
| SS-29 | NCHRP 350 | A.B. Chance | Sign Supports, Mailboxes, and Delineator Posts | Helical Screw Foundations for Motorist Aid Call boxes | |
| LS-26 | NCHRP 350 | Sherman International | Luminaire Supports | Direct Burial Breakaway Fiberglass Luminaire Supports |