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 |
|---|---|---|---|---|---|
| B-14 | NCHRP 350 | Smith-Midland Corp. | Longitudinal Barriers and Bridge Rails | J-hook connection for precast concrete median barriers. | |
| SS-20 | NCHRP 350 | Franklin Steel | Sign Supports, Mailboxes, and Delineator Posts | 2 to 3 pound-per-foot flanged channel "U" posts. | |
| LS-22 | NCHRP 350 | Akron Foundry | Luminaire Supports | Chart summarizing approval letters ls2, ls4, ls9, ls15, ls19 | |
| LS-21 | NCHRP 350 | Shakespeare Products | Luminaire Supports | Fiberglass poles ASW27 thru ASW35 and AHW27 thru AHW35 with Al shoe base | |
| LS-20 | NCHRP 350 | Union Metal | Luminaire Supports | A2849 Al Transformer Base, 15" BC | |
| LS-19 | NCHRP 350 | Akron Foundry | Luminaire Supports | TB-3-17, TB-5-9, TB-6-9 Transformer Bases, 11.5 to 15.5" BC | |
| LS-18 | NCHRP 350 | Akron Foundry | Luminaire Supports | F-1300 and F-1302 Al Transformer Bases (tests of Pole Lite bases) | |
| LS-17 | NCHRP 350 | Akron Foundry | Luminaire Supports | CS-300 and CS-370 Al Transformer Bases (tests of Feralux bases) | |
| SS-19 | NCHRP 350 | Allied Tube and Conduit | Sign Supports, Mailboxes, and Delineator Posts | Square-Fit signpost systems. | |
| LS-16 | NCHRP 350 | Valmont Industries | Luminaire Supports | Slip Base specifications |