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                Safety Eligibility Letter WZ-248
  
  **Hardware Type:**
            Work Zone Devices
                          **Code:**
            WZ-248
                          **Date:**
            02/22/2007
                          **Testing Criteria:**
            NCHRP 350
                          **Manufacturer:**
            Eastern Metal /USA Sign
                          **Device Description:**
            X-Footprint sign stand
                          **View PDF:**
            wz248.pdf (54.39 KB)
    
    
Skip to contentSkip to contentUnited States Department of Transportation - Federal Highway AdministrationDOT logo
U.S. Department of Transportation
**Federal Highway Administration**
400 Seventh St., S.W.
Washington, D.C.  20590**February 22, 2007**


**In Reply Refer to: HSSD/WZ-248**

Mr. Stephen T. Zimar
Product Manager
Eastern Metal/USA-Sign
1430 Sullivan Street 
Elmira, NY 14901-1698
Dear Mr. Zimar :
Thank you for your letter requesting modifications to  previously issued Federal Highway Administration (FHWA) acceptance letters of  your company’s crashworthy sign stands using various sign substrates for use in  work zones on the National Highway System (NHS). You requested acceptance of your stand model  X-561 which has acceptance for roll-up signs at five feet above grade (see  WZ-56) to be modified to display at seven feet above grade for use on the NHS  under the provisions of National Cooperative Highway Research Program (NCHRP)  Report 350, “Recommended Procedures for the Safety Performance Evaluation of  Highway Features”. In addition, you  requested that we update product codes referenced on previously issued  acceptance letters to correspond to current code methodology.
The X-561 stand was originally accepted to display roll-up  signs at a height of five feet in our letter WZ-56 dated October 12, 2000. Your request to modify acceptance of this  stand to display at seven feet will require an additional mast height of 24-3⁄4  inches and subsequent weight gain of 1.3 pounds. Based on the crashworthy characteristics of  this sign stand as previously tested, the requested additional height will not  pose a risk to the occupant compartment or cause excessive vehicle velocity  change. Therefore, we acknowledge your  X-561 sign stand (that was also coded as CX-561) now coded as C-841, at five  and seven feet above grade is acceptable for use on the NHS when selected by  the contracting authority.
Your second request is to update product codes referenced on  previously issued acceptance letters WZ-59, WZ-78A, WZ-103A, WZ-122. You mentioned the product codes E-350 and 
  E-380 no longer correspond with your current code  methodology. For example, your current  methodology for the E-350 by virtue of the last digit “0” includes no sign  brackets. When the last digit displays a  “1,” then one bracket is required (roll-up sign). When the last digit displays a “2,” then two  brackets are required (rigid sign). Finally,  when the last digit displays a “3,” for example E-353, then the roll-up bracket  is added allowing either both roll-up or rigid sign substrates. Therefore, the E-350 becomes E-352 and the  E-380 becomes E-353 with the current code methodology.  Since you have changed nothing regarding the material composition,  weight, dimensions, or manufacturing processes of the E-350 and E-380 that have  already been accepted, this letter acknowledges the code change mentioned  above.
Please note the following standard provisions that apply to  FHWA letters of acceptance:
Our acceptance is limited to the crashworthiness  characteristics of the devices and does not cover their structural features,  nor conformity with the Manual on Uniform Traffic Control Devices.
  Any changes that may adversely influence the  crashworthiness of the device will require a new acceptance letter.
  Should the FHWA discover that the qualification  testing was flawed, that in-service performance reveals unacceptable  safety problems, or that the device being marketed is significantly different  from the version that was crash tested, it reserves the right to modify or  revoke its acceptance.
  You will be expected to supply potential users  with sufficient information on design and installation requirements to ensure  proper performance.
  You will be expected to certify to potential  users that the hardware furnished has essentially the same chemistry,  mechanical properties, and geometry as that submitted for acceptance, and that  they will meet the crashworthiness requirements of the FHWA and the NCHRP  Report 350.
  To prevent misunderstanding by others, this  letter of acceptance, designated as number WZ-248 shall not be reproduced  except in full. This letter, and the  test documentation upon which this letter is based, is public information. All such letters and documentation may be  reviewed at our office upon request.
  This acceptance letter shall not be construed as  authorization or consent by the FHWA to use, manufacture, or sell any patented  device for which the applicant is not the patent holder. The acceptance letter is limited to the  crashworthiness characteristics of the candidate device, and the FHWA is  neither prepared nor required to become involved in issues concerning patent  law. Patent issues, if any, are to be  resolved by the applicant.Sincerely yours,
John R. Baxter
John R.  Baxter, P.E.
Director,  Office of Safety Design
Office of  SafetySafety Home | FHWA Home 
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