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                Safety Eligibility Letter B-20A
  
  **Hardware Type:**
            Longitudinal Barriers and Bridge Rails
                          **Code:**
            B-20A
                          **Date:**
            01/04/1993
                          **Testing Criteria:**
            NCHRP 350
                          **Manufacturer:**
            Mobil Chemical Company Suppl.
                          **Device Description:**
            permits use as a blockout on steel posts.
                          **View PDF:**
            b-20a.pdf (168.04 KB) U.S. DEPARTMENT OF TRANSPORTATION

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