| Designator | RWM04a-b |
| Category | Rail (R) |
| Type | W-Beam (W) |
| Function | Main Member (M) |
| Manufacturer | Non-Proprietary |
| FHWA Eligibility Letter | |
| Contact | |
| Drawings | RWM04a-b_20230915.pdf |
| Other Docs | |
| Archive | RWM04a-b (RE-3-73)_1979.pdf RWM04a-b_1995.pdf |
| External Links |
Bridge Railing
Longitudinal Barrier
- Midwest Guardrail System, Steel Post, 75" Spacing
- Midwest Guardrail System, White Pine Post, 75" Spacing
- Midwest Guardrail System, Wood Post, 75" Spacing
- Culvert-Mounted Strong-Post MGS
- MGS Adjacent to 2H:1V Fill Slope, Steel Posts
- MGS Adjacent to 2H:1V Fill Slope, Wood Posts
- Non-Blocked MGS Adjacent to 3H:1V Fill Slope on Top of Wire-Faced MSE Wall
- Midwest Guardrail System MGS, 31" Non-Blocked
- MGS Adjacent to 2H:1V Fill Slope, Steel Posts
- MGS Adjacent to 2H:1V Fill Slope, Wood Posts
- MGS Adjacent to 2H:1V Fill Slope, White Pine Wood Posts
- Top-Mounted Weak-Post Guardrail Attached to Culvert
- Side-Mounted Weak-Post Guardrail Attached to Culvert
- Steel-Post MGS with Omitted Post
- Weak-Post W-Beam Guardrail in Asphalt Mow Strip
- Weak-Post W-Beam Guardrail in Concrete Mow Strip
- Wood-Post MGS with Omitted Post
- PennDOT W-Beam Guiderail over Underground Structure
Transition System
- MGS W-Beam to Thrie-Beam Transition
- Transition from Steel-Post MGS to Thrie-Beam Approach Guardrail
- Transition from Wood-Post MGS to Thrie-Beam Approach Guardrail
- Nested MGS W-Beam to Thrie-Beam Transition with Curb, Steel Posts
- Nested MGS W-Beam to Thrie-Beam Transition with Curb, Wood Posts
- Weak-Post to Strong-Post W-Beam Guardrail Transition