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                Safety Eligibility Letter B-29D
  
  **Hardware Type:**
            Longitudinal Barriers and Bridge Rails
                          **Code:**
            B-29D
                          **Date:**
            08/28/2002
                          **Testing Criteria:**
            NCHRP 350
                          **Manufacturer:**
            RAMCO International
                          **Device Description:**
            Modification to Polylumber block
                          **View PDF:**
            b29d.pdf (57.32 KB)
    
    
August 28, 2002
HSA-10/B29D
Mr. Russell A. Walker
  Director, Sales & Marketing
  RAMCO INTERNATIONAL
  P.O. Box 56
  Imperial, PA 15126
Dear Mr. Walker:
Your July 25 letter to Mr. Richard Powers of my staff requested acceptance 
  of a modified recycled plastic offset block for use with w-beam guardrail.  
  Whereas the original block , accepted on January 9, 1995 (acceptance letter 
  B-29), was rectangular with a nominal 6-inch width, your modified block tapers 
  along each side from a 5-inch width at the post flange to a 4.25-inch width 
  at the traffic face.  All other dimensions, including its 7.5-inch depth and 
  field-side routing remain unchanged.
The modified block described above, and called the PolyLumber PL5814R, is acceptable 
  for use with strong-post w-beam guardrail on the National Highway System.  Please 
  note the following standard provisions that apply to FHWA letters of acceptance:
Any changes that may adversely influence the crashworthiness of the device 
    will require a new acceptance letter.
  Should the FHWA discover that in-service performance reveals unacceptable 
    safety problems, or that the device being marketed is significantly different 
    from the version that was approved, it reserves the right to modify or revoke 
    its acceptance.
  You will be expected to certify to potential users that the product furnished 
    has essentially the same chemistry, mechanical properties, and geometry as 
    that submitted for acceptance.
  If proprietary devices are specified for use on Federal-aid projects, except 
    exempt, non-NHS projects, they:  (a) must be supplied through competitive 
    bidding with equally suitable non-patented items; (b) the highway agency must 
    certify that they are essential for synchronization with existing highway 
    facilities or that no equally suitable alternative exists or; (c) they must 
    be used for research or for a distinctive type of construction on relatively 
    short sections of road for experimental purposes.Sincerely yours,
(original signed by Carol H. Jacoby)
Carol H. Jacoby, P.E.
  Director, Office of Safety design U.S. DEPARTMENT OF TRANSPORTATION

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