2203 - ROLL-UP SIGNS 2200-5
2203.1 Description
This specification covers white, fluorescent orange, and fluorescent pink retroreflective sheeting used for temporary roll-up warning signs.
2203.2 Requirements
a. Provide retroreflective sheeting that complies with ASTM D 4956, Type VI, Class 5. b. Mounting Stands. The type and configuration of stands for mounting and displaying roll-up signs are not specified here, and are at the Contractor’s option. Ho wever, all stands used must meet the crashworthy criteria for Category 2 devices contained in the testing and acc eptance guidelines of the National Cooperative Highway Research Program (NCHRP) Report 350. Retain a copy of the NCHRP Report 350 crashworthy test data and the FHWA acceptance letter to be provided to the Engineer if re quested. In addition, the mounted sign and stand must be able to resist normal wind loading without falling over, and be able to maintain a minimum mounting height of 12 inches above the edge of the pavement.
2203.3 Test Methods
All tests will be conducted in accordance with ASTM D 49 56 with the exception of artificial weathering. Artificial weathering will be conducted according to AS TM G 155, Cycle 1, with the following additions and exceptions: At the end of each 20-hour cycle, the panels will be placed in a cold cabinet at approximately 0ºF for 1 hour. After removal from the cold cabinet, panels will be returned to the weatherometer to await the start of the next cycle.
2203.4 Prequalification
Only the retroreflective sheeting used to manufacture the signs will be prequalified. Sheeting manufacturers interested in prequalifying material under th is specification must submit 3 pieces 24 inches square to the Engineer of Tests. Samples will be tested for complia nce with all requirements of this specification. Each manufacturer will be notified of the test results. If the prequalification samples of retroreflective sheeting comply with this specification, the product will be placed on a list of prequalified products maintained by the Bureau of Construction and Materials. No retroreflective sheeting will be used on KDOT projects unless it has been pr equalified. Manufacturers will be required to requalify at intervals determined by the Engineer of Tests. Testing and evaluation by KDOT may be waived if complete testing has been performed on the identical product by AASHTO National Transportation Product Evaluation Program (NTPEP) within the last five years. Forward an official copy of the test report along with evidence that the product referenced is identical to that submitted for prequalification, to the Engineer of Tests for evaluation.
2203.5 Basis of Acceptance
Prequalification as required by subsection 2203.4 above. Receipt and approval of a certifica tion prepared by the manufacturer st ating that the sheeting used to manufacture the roll-up signs is essentially the same as that submitted for prequalification. Visual inspection on delivery.
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