| Designator | RTM01a-b | 
| Category | Rail (R) | 
| Type | Thrie-Beam (T) | 
| Function | Main Member (M) | 
| Manufacturer | Non-Proprietary | 
| FHWA Eligibility Letter | |
| Contact | |
| Drawings | RTM01a-b_20250317.pdf | 
| Other Docs | |
| Archive |   RTM01a-02b (RE-63-76)_1979.pdf  RTM01a-02b_2005.pdf  | 
| External Links | 
1-Space Thrie-Beam Guardrail, Short (6′-3″)
    
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