Federal Highway Administration
1200 New Jersey Ave. S.E.
Washington, D.C. 20590
October 2, 2007
Mr. Andrew Evans
6771 Kirkpatrick Cres.
Saanichton, British Columbia
Canada, V8M 1Z8
Dear Mr. Evans:
In your mail correspondence of July 13, 2007, you requested the Federal Highway Administration’s (FHWA) acceptance of your company's FL-1412 solar powered beacon mounted on the previously accepted breakaway sign post coupling, the “Kleen Break” (model 425) by Xcessories Squared Inc., for use on the National Highway System (NHS) under the provisions of the National Cooperative Highway Research Program (NCHRP) Report 350 "Recommended Procedures for the Safety Performance Evaluation of Highway Features". Accompanying your letter were the details of the Kleen Break breakaway coupling and a drawing of the FL-1412 beacon, both of which are enclosed with this letter.
The JSF Technologies Model FL-1412 solar powered beacon consists of JSF’s solar engine, the engine housing, batteries and control module, a standard signal head with LED signal module, and a mount for the 1-3/4 inch (4.5 cm) to 2-1/4 inch (5.7 cm) solid or perforated square steel tube (PSST). The weight of the device is approximately 32.2 lb (14.6 kg). The assembly drawing of the solar beacon is provided in the enclosure.
Testing of the Kleen Break was performed in compliance with the guidelines contained in the NCHRP Report 350, “Recommended Procedures for the Safety Performance Evaluation of Highway Features” and was documented in the FHWA acceptance letter SS-131 dated December 2, 2005. Requirements for breakaway supports are those in the American Association of State Highway and Transportation Officials' (AASHTO) Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals.
Because the previously accepted Kleen Break breakaway coupling uses a rigid perforated or solid square steel tube post with the frangible coupling, we agree that the maximum change in vehicle velocity and overall breakaway performance of the frangible coupling will not be affected by the addition of the 32.2 lb (14.6 kg) JSF Technologies Model FL-1412 beacon
installed above the sign. The maximum change in velocity in the low-speed pendulum tests conducted on the Kleen Break coupling was 0.95 ft/s (0.29 m/s) and is therefore likely to pass this test with the 32.2 lb (14.6 kg) JSF Technologies Model FL-1412 beacon installed. Further, the normal rotation of the sign assembly about the center of gravity will likely allow the test vehicle to pass under it with minimal contact. Since the maximum weight for luminaire poles is limited to 1000 pounds (454 kg) to reduce roof deformation in the low speed impact, it is likely that the extra 32.2 lb (14.6 kg) of the JSF Technologies Model FL-1412 beacon added to the approximate 66 lb (30 kg) Kleen Break coupler with PSST post would not cause a roof deformation in excess of the acceptable limits of 6 inches (150 mm).
When the JSF Technologies Model FL-1412 beacon is installed on a 1-3/4 inch (4.5 cm) to 2-1/4 inch (5.7 cm) solid or PSST sign post and utilizes the previously FHWA accepted breakaway sign post coupler as mentioned above, it is acceptable for use at all appropriate locations on the NHS as a test level 3 device under the provisions of NCHRP Report 350 when selected by the contracting authority.
Please note the following standard provisions that apply to the FHWA letters of acceptance:
George E. Rice, Jr.
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