| Designator | SWC20a | 
| System Type | Concrete Barrier (C) | 
| Test Specification | AASHTO MASH 2016 | 
| Test Level | TL-3 | 
| Anchor Type | Free-Standing | 
| Dynamic Deflection | 36" [914mm] < DD ≤ 60" [1524mm] | 
| Working Width | 48" [1219mm] < WW ≤ 72" [1829mm] | 
| Width | 18" [457mm] < W ≤ 24" [610mm] | 
| Height | 30" [762mm] < H ≤ 33" [838mm] | 
| Drawing Status | As Submitted | 
| Contact | Midwest Roadside Safety Facility | 
| Manufacturer | Non-Proprietary | 
| FHWA Eligibility Letter | B-255.pdf | 
| Components | Class 4.6 Hex Bolt & Nut High-Strength Structural Hex Bolt & Nut Straight Anchor Stud & Nuts Temporary Barrier Connector Pin with Retaining Bolt Plain Round Washer | 
| Drawings | SWC20a-b_Draft20150319.pdf | 
| Other Docs | |
| Archive | |
| External Links | 
Low-Deflection Portable Concrete Barrier (PCB) Retrofit, Version 1
    
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