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cr_r <br /> Use rubber or recycled plastic blocks that have a minimum Durometer hardness <br /> of 50 (ASTM D 2240) , show no cracking at the end of an ozone exposure of 100 plus or minus <br /> 10 pphm for 15 hours at 100°F (ASTM D 1149 mounting type A) , do not exceed 15 points <br /> change in Durometer hardness in oven ageing for 70 hours at 158°F (ASTM D 573 ) , and show <br /> no cutting or tearing under a 6 , 500 lb load applied through a guardrail section . Ensure that the M <br /> blocks present a neat appearance and have plane surfaces . Provide rubber or recycled plastic <br /> blocks that are 6 inches wide , 8 inches deep and 14 inches high . Allow dimensional tolerances of <br /> plus or minus 5 /8 inch in height, plus or minus 3 /8 inch in width, and plus or minus 3 / 8 inch in <br /> depth . <br /> Use recycled plastic offset blocks that meet the requirements of Section 972 and <br /> are listed on the Qualified Products List (QPL) . Manufacturers seeking evaluation of their <br /> product shall submit an application in accordance with Section 6 and include certified test reports <br /> from an approved independent test laboratory that shows the material meets all the requirements <br /> of this Section and Section 972 . <br /> 544 CRASH CUSHIONS . <br /> (REV 64740) (84240) (141 ) <br /> SECTION 544 (Pages 678 — 679) is deleted and the following substituted : <br /> SECTION 544 <br /> CRASH CUSHIONS <br /> 544. 1 Description . <br /> Install redirective and non-redirective crash cushions (of the sizes and types designated in <br /> Le the plans . Redirective crash cushions are safety devices with capabilities to redirect the <br /> impacting vehicle over the full length of the device . Non-redirective crash cushions allow <br /> controlled penetration of the impacting vehicle over the full length of the device . <br /> 544-2 Qualified Products List (QPL) . <br /> Use crash cushions listed on the QPL. Manufacturers seeking evaluation of their crash <br /> cushions shall furnish certified test reports showing that their products meet all test requirements <br /> of NCHRP 350 or the Manual for Assessing Safety Hardware 2009 (MASH) . <br /> 544-3 Construction. <br /> Handle and install manufactured materials or articles in accordance with the <br /> manufacturer ' s instructions and the Design Standards . <br /> Use attenuators delineated with a Type I Object Marker specified in Section 705 or <br /> sheeting in accordance with 990 -2 . <br /> Perform repairs necessary due to defective material, work, or operations without <br /> additional cost to the Department. <br /> Restore the attenuator damaged by the traveling public after the installation is completed, <br /> accepted and serving its intended purpose on an open section of bridge or roadway within <br /> 24 hours . <br /> 455 - <br /> FPID ( S ) : <br /> 55 - <br /> FPID ( S ) : 4231864 - 58 - 01 <br />