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-38A | NCHRP 350 | Xcessories Squared | Sign Supports, Mailboxes, and Delineator Posts | Reference Xcessories Squared as the Manufacturer | |
| SS-52A | NCHRP 350 | Xcessories Squared | Sign Supports, Mailboxes, and Delineator Posts | Reference letters to Unistrut and Allied Highway Sales | |
| SS-68C | NCHRP 350 | X-Cessories Squared | Sign Supports, Mailboxes, and Delineator Posts | 3-bolt slip base for perf. square steel posts. Accepted previously via SS-52 on 2/8/65 under different name | |
| SS-24A | NCHRP 350 | Xcessories Squared | Sign Supports, Mailboxes, and Delineator Posts | Reference Xcessories Squared as the manufacturer. | |
| B-42 | NCHRP 350 | M. Budd, Rockingham Precast | Longitudinal Barriers and Bridge Rails | Temporary cmb - F shape w/ slotted tube/T-bar Connection | |
| B-43 | NCHRP 350 | John Marinelli | Longitudinal Barriers and Bridge Rails | Lifetime Lumber Prod. Recycled gr offset block for wood and steel post w-beam | |
| B-41 | NCHRP 350 | D. Sicking, U of NebraskA | Longitudinal Barriers and Bridge Rails | Temporary cmb - F shape w/ pin & loop conn. | |
| SS-68B | NCHRP 350 | X-Cessories Squared | Sign Supports, Mailboxes, and Delineator Posts | Slip Base for Retrofit Square Steel Tube Posts | |
| CC-26F | NCHRP 350 | Barrier Terminals and Crash Cushions | Removed CC-26F restrictions on use at certain sites | ||
| B-40 | NCHRP 350 | J. Duckett, Barrier Systems | Longitudinal Barriers and Bridge Rails | Narrow QuickChange Moveable Barrier |