| Designator | SGM04a |
| System Type | Median Barrier (M) |
| Test Specification | NCHRP Report 350 |
| Test Level | TL-3 |
| Rail Type | W-Beam |
| Deflection Category | Semi-Rig |
| Dynamic Deflection | |
| Working Width | |
| Aesthetic | Yes |
| Width | |
| Height | 26" [660mm] < H ≤ 30" [762mm] |
| Manufacturer | Non-Proprietary |
| Drawing Status | Review Complete |
| Contact | Federal Highway Administration |
| FHWA Eligibility Letter | b64.pdf |
| Components | Guardrail Bolt & Recessed Nut Plain Round Washer W-Beam Timber Blockout Wide-Flange Guardrail Post 2-Space W-Beam Guardrail |
| Drawings | SGM04a-b.dwg sgm04a-b.pdf |
| Other Docs | sgm04a-b.doc |
| Archive | |
| External Links |