| Designator | RTB01a-b |
| Category | Rail (R) |
| Type | Thrie-Beam (T) |
| Function | Backup Plate (B) |
| Manufacturer | Non-Proprietary |
| FHWA Eligibility Letter | |
| Contact | |
| Drawings | RTB01a-b_2005.pdf RTB01a-b_Pg1_2005.DGN RTB01a-b_Pg1_2005.dwg RTB01a-b_Pg2_2005.doc |
| Other Docs | |
| Archive | RTB01a-b (RE-64-76)_1979.pdf |
| External Links |
Thrie-Beam Back-up Plate
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