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BUTT JOINTS (BDE) <br /> Effective: July 1, 2016 <br /> Add the following to Article 406.08 of the Standard Specifications. <br /> "(c) Temporary Plastic Ramps. Temporary plastic ramps shall be made of high density <br /> polyethylene meeting the properties listed below. Temporary plastic ramps shall only be <br /> used on roadways with permanent posted speeds of 55 mph or less. The ramps shall <br /> have a minimum taper rate of 1:30 (V:H). The leading edge of the plastic ramp shall <br /> have a maximum thickness of 1/4 in. (6 mm) and the trailing edge shall match the height <br /> of the adjacent pavement± 1/4 in. (±6 mm). <br /> The ramp will be accepted by certification. The Contractor shall furnish a certification <br /> from the manufacturer stating the temporary plastic ramp meets the following <br /> requirements. <br /> Physical Property Test Method Requirement <br /> Melt Index ASTM D 1238 8.2 /10 minutes <br /> Density ASTM D 1505 0.965 /cc <br /> Tensile Strength @ Break ASTM D 638 2223 psi 15 MPa <br /> Tensile Strength @ Yield ASTM D 638 4110 psi (28 MPa <br /> Elongation Yieldpercent ASTM D 638 7.3 min. <br /> Durometer Hardness, Shore D ASTM D 2240 65 <br /> Heat Deflection Temperature, 66 psi ASTM D 648 176 OF (80 OC) <br /> Low Temperature Brittleness, F50 ASTM D 746 <-105 OF (<-76 OC) <br /> 1/ Crosshead speed-2 in./minute <br /> The temporary plastic ramps shall be installed according to the manufacturer's <br /> specifications and fastened with anchors meeting the manufacturer's recommendations. <br /> Temporary plastic ramps that fail to stay in place or create a traffic hazard shall be <br /> replaced immediately with temporary HMA ramps at the Contractor's expense." <br /> 80366 <br />