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                Safety Eligibility Letter SS-126B
  
  **Hardware Type:**
            Sign Supports, Mailboxes, and Delineator Posts
                          **Code:**
            SS-126B
                          **Date:**
            05/06/2014
                          **Testing Criteria:**
            NCHRP 350
                          **Manufacturer:**
            Trinity Highway Products
                          **Device Description:**
            Perforated Square Steel Tube Sign Supports
                          **View PDF:**
            ss126b.pdf (1.45 MB)
    
    Safety Eligibility Letter SS-126B

			**Download Version**PDF [1.69 MB]

			

			DOT logoU.S. Department of Transportation**Federal Highway Administration**

			1200 New Jersey Ave. S.E.Washington, D.C. 20590

May 6, 2014
In Reply Refer To: 
  HSST/SS-126B
Mr. Bret Eckert
  Trinity Highway Products
  3617 Cincinnati Avenue
  Rocklin, California 95765
Dear Mr.Eckert:
This letter is in response to your request for  the Federal Highway Administration (FHWA) to review a roadside safety system  for eligibility for reimbursement under the Federal-aid highway program.
Name of system:
    Perforated Square Steel Tube Sign SupportsType of system:
    Generic Breakaway Sign SupportsTest Level:
    NCHRP Report 350 Test Level 3Testing conducted by:
    Texas A&M Transportation InstituteTask Force 13 Designator
    PTP12a, PTP20a-24bDate of  request:
    November 15, 2013**Decision**
  The following device is eligible, with details provided in  the form which is attached as an integral part of this letter:
Generic Perforated Square Steel Tube Breakaway Sign Supports with modified materials specified.Based on a review of crash test results certifying the  device described herein meets the crash test and evaluation criteria of the  National Cooperative Highway Research Program (NCHRP) Report 350, the device is  eligible for reimbursement under the Federal-aid highway program.  Eligibility  for reimbursement under the Federal-aid highway program does not establish  approval or endorsement by the FHWA for any particular purpose or use.
The FHWA, the Department of Transportation, and the  United States Government do not endorse products or services and the issuance  of a reimbursement eligibility letter is not an endorsement of any product or  service.
**Requirements**
To be found eligible for Federal-aid funding, roadside  safety devices should meet the crash test and evaluation criteria contained in  the NCHRP Report 350 or the American Association of  State Highway and Transportation Officials’ Manual for Assessing Safety  Hardware (MASH).
**Description**
  This letter modifies SS-126(Revised) by removing the ASTM  A653 mechanical requirement that the ultimate tensile strength of the steel coil used to produce the  perforated square steel tube should not exceed 550 MPa (79,800 psi) or have an  elongation measured over 50mm (2 inches) greater than 28%. The crash test laboratory concurs in this change.  The device and supporting documentation are described in the attached form.
**Summary and Standard Provisions**
  Therefore, the system described and detailed in the  attached form is eligible for reimbursement and may be installed under the  range of conditions tested.
Please note the following standard provisions that apply  to FHWA eligibility letters:
This letter provides a AASHTO/ARTBA/AGC Task  Force 13 designator that should be used for the purpose of the creation of a  new and/or the update of existing Task Force 13 drawing for posting on the  on-line ‘Guide to Standardized Highway Barrier Hardware’ currently referenced  in AASHTO Roadside Design Guide.
  This finding of eligibility does not cover other structural features of  the systems, nor conformity with the Manual on Uniform Traffic Control Devices.
  Any changes that may influence system  conformance with NCHRP Report 350 criteria will require a new reimbursement  eligibility letter.
  Should the FHWA discover that the qualification  testing was flawed, that in-service performance reveals safety problems, or  that the system is significantly different from the version that was crash  tested, we reserve the right to modify or revoke this letter.
  You are expected to supply potential users with  sufficient information on design and installation 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 crash test and evaluation criteria of the NCHRP Report  350.
  To  prevent misunderstanding by others, this letter of eligibility is designated as  number SS-126B and shall not be reproduced except in full. This letter and the test documentation upon  which it is based are public information.  All such letters and documentation may be reviewed at our office 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.The FHWA does not become involved in issues concerning patent law.  Patent issues, if any, are to be resolved by the applicant.

Sincerely yours,
			Signature of 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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