| Designator | SBB21c |
| Material | Steel Tube/Box (B) |
| Test Specification | NCHRP Report 350 |
| Test Level | TL-3 |
| Perm/Temp | |
| Mounting Type | |
| Deck Type | |
| Aesthetic | No |
| See-Through | No |
| Retrofit | No |
| Combo Traffic/Pedestrian | No |
| Contact | |
| Drawing Status | No Drawing |
| Manufacturer | Non-Proprietary |
| FHWA Eligibility Letter | |
| Components | |
| Drawings | |
| Other Docs | mi_railopp1.pdf mi_railopp2.pdf |
| Archive | |
| External Links |