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                Safety Eligibility Letter WZ-281B
  
  **Hardware Type:**
            Work Zone Devices
                          **Code:**
            WZ-281B
                          **Date:**
            04/21/2016
                          **Testing Criteria:**
            NCHRP 350
                          **Manufacturer:**
            MDI Worldwide
                          **Device Description:**
            30TRI Tripod sign stand
                          **View PDF:**
            wz281b.pdf (1.72 MB)
    
    Safety Eligibility Letter WZ-281B
			
			
			 
			**Download Version**PDF [768 MB]
			
			DOT logoU.S. Department of Transportation**Federal Highway Administration**
			1200 New Jersey Ave. S.E.Washington, D.C. 20590
			April 18, 2016
			In Reply Refer To:
HSST-1/WZ-281B
			
			Mr. Troy Tapley
MDI Worldwide
38271 W. Twelve Mile Road
Farmington Hills, Michigan Â 48331
			Dear Mr.Tapley:
			This letter is in response to your May 5, 2015 request for the Federal Highway Administration (FHWA) to review a roadside safety device, hardware, or system for eligibility for reimbursement under the Federal-aid highway program.  This FHWA letter of eligibility is assigned FHWA control number WZ-281B and is valid until a subsequent letter is issued by FHWA that expressly references this device.
			**Decision**
The following devices are eligible, with details provided in the form which is attached as an integral part of this letter:
30TRI tripod sign stand***Scope of this  Letter***
            To be found eligible for Federal-aid funding, modified  roadside safety devices should meet the crash test and evaluation criteria  contained in the National Cooperative Highway Research Program (NCHRP) Report 350.  However, the FHWA, the Department of Transportation, and the United States  Government do not regulate the manufacture of roadside safety devices.  Eligibility for reimbursement under the Federal-aid highway program does not  establish approval, certification or endorsement of the device for any  particular purpose or use.
            This letter is not  a determination by the FHWA, the Department of Transportation, or the  United States Government that a vehicle  crash involving the device will result in any particular outcome, nor is it a  guarantee of the in-service performance of this device. Proper manufacturing,  installation, and maintenance are required in order for this device to function  as tested.
This finding of eligibility is limited to the  crashworthiness of the system and does not cover other structural features, nor  conformity with the Manual on Uniform Traffic Control Devices.
      ***Eligibility for  Reimbursement***
      FHWA previously issued an eligibility letter for the roadside safety system described in your pending request. Your pending request now identifies a modification to that roadside safety system.
      The original  roadside safety device information is provided here:

Name of system:
			    50TRI tripod sign standType of system:
			    Work Zone Traffic Control DeviceDate of  original request:
			    April  30, 2009Date of original FHWA eligibility letter:
			    July  1, 2009FHWA  Control number
			    WZ-281The pending  modification(s) consists of the following changes:
      The       30TRI legs are constructed of round steel tubing 1.00 in × .065 in [25mm × 1.5mm] in diameter instead of square steel tubing 1.25 in × 1.25 in × 0.065 in [30 mm × 30 mm × 1.6 mm].
        The       30TRI overall mass is 12 lbs. [5.4 kg] compared to a mass of 16 lbs. [7.3       kg].
        Use       with the following comparable 48" × 48" (16 - sq. ft) and smaller sign       substrates:
        0.375"        [9.5mm] and 0.500" [12.7mm] thick plywood signs
          0.080"        [2mm], 0.100" [2.5mm], and 0.125" [3mm] thick solid aluminum
          0.080"        [2mm] and 0.125" [3mm] aluminum laminates such as: Alpolic, Dibond,        Reynolite or similar substrates
          0.400"        [10mm] to 0.625" [16mm] corrugated plasticsFHWA concurs with  the recommendation of the accredited crash testing laboratory as stated within  the attached form.

      ***Full Description  of the Eligible Device***
      The device and supporting documentation, including reports of the crash tests or other testing done, videos of any crash testing, and/or drawings of the device, are described in the attached form.
      ***Notice***
      If a  manufacturer makes any modification to any of their roadside safety hardware  that has an existing eligibility letter from FHWA, the manufacturer must notify  FHWA of such modification with a request for continued eligibility for  reimbursement.Â  The notice of all  modifications to a device must be accompanied by:
    
        Significant modifications – For these modifications, crash        test results must be submitted with accompanying documentation and        videos.
          Non-signification modifications – For these modifications, a        statement from the crash test laboratory on the potential effect of the        modification on the ability of the device to meet the relevant crash test        criteria.FHWA's determination of continued eligibility for the modified  hardware will be based on whether the modified hardware will continue to meet  the relevant crash test criteria.
      You are expected to supply potential users with sufficient  information on design, installation and maintenance requirements to ensure  proper performance.
      You are expected to certify to potential users that the  hardware furnished has the same chemistry, mechanical properties, and geometry  as that submitted for review, and that it will meet the test and evaluation  criteria of the NCHRP Report 350.
Issuance of this letter does not convey property  rights of any sort or any exclusive privilege. This letter is based on the  premise that information and reports submitted by you are accurate and correct.  We reserve the right to modify or revoke this  letter if: (1) there  are any inaccuracies in the information submitted in  support of your request for this letter, (2) the qualification testing was  flawed, (3) in-service performance or other information reveals safety  problems, (4) the system is significantly different from the version that was  crash tested, or (5) any other information indicates that the letter was issued  in error or otherwise does not reflect full and complete information about the  crashworthiness of the system.
      ***Standard Provisions***
      To prevent       misunderstanding by others, this letter of eligibility designated as FHWA       control number WZ-281B shall not be reproduced except in full. This letter and the test documentation       upon which it is based are public information.Â  All such letters and documentation may       be reviewed upon request.
           This letter shall not be construed as authorization or consent by       the FHWA to use, manufacture, or sell any patented system for which the       applicant is not the patent holder.
           If       the subject device is a patented product it may be considered to be       proprietary.Â  If proprietary systems       are specified by a highway agency for use on Federal-aid projects: (a)       they must be supplied through competitive bidding with equally suitable       unpatented items; (b) the highway agency must certify that they are       essential for synchronization with the 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 Our regulations concerning proprietary       products are contained in Title 23, Code of Federal Regulations, Section       635.411.Sincerely yours,
			Signature Michael S. Griffith
			Michael S. Griffith
Director,  Office of Safety Technologies
              Office of SafetyEnclosures U.S. DEPARTMENT OF TRANSPORTATION

**Federal Highway Administration**

1200 NEW JERSEY AVENUE, SE

WASHINGTON, DC 20590

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