| Designator | SGM12 |
| System Type | Median Barrier (M) |
| Test Specification | NCHRP Report 350 |
| Test Level | TL-5 |
| Rail Type | Closed Profile |
| Deflection Category | Rigid |
| Dynamic Deflection | |
| Working Width | |
| Aesthetic | Yes |
| Width | |
| Height | H > 33" [838mm] |
| Manufacturer | Non-Proprietary |
| Drawing Status | Review Complete |
| Contact | Federal Highway Administration |
| FHWA Eligibility Letter | b64.pdf |
| Components | |
| Drawings | SGM12.dwg sgm12.pdf |
| Other Docs | sgm12.doc |
| Archive | |
| External Links |