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it r ii iii I T � � B f7'1 n Minimum Long -Term Service D -Load Pipe Class Lb /ft /ft [N /m /mm] S 600 [30] 1- 800 [401 II 1,000 [501 III 1,350 [65] IV 2,000 [100] Ensure the relationship between short -term crush loads required to achieve 100 -year long -term design loads and the relationship between the saturated and dry crush loads are provided. The minimum dry crush load can not be less than a factor of 2 times the long -term service load. The short term crush load will be determined as required in Section 10.2 of ASTM C 1450 except the specimen will be tested by the appropriate section of ASTM C 497 [ASTM C 4971, External Load Crushing Strength by the Three - Edge Bearing Test Method. 520 CONCRETE GUTTER, CURB ELEMENTS, AND TRAFFIC SEPARATOR. (REV 6 -8 -05) (FA 6- 29 -05) (1 -06) ARTICLE 520-12 (Page 588) is expanded by the following new Subarticle: 520 -12.5 Asphalt Curb Pad: When detailed in the plans this material shall be included in the Contractors unit price for the item in which it is used. SUBARTICLE 12.5 (Page 588) is deleted and the following substituted: 520 -12.6 Payment Items: Payment will be made under: Item No. 520- 1- Concrete Curb and Gutter - per foot. Item No. 2520- 1- Concrete Curb and Gutter - per meter. Item No. 520- 2- Concrete Curb - per foot. Item No. 2520- 2- Concrete Curb - per meter. Item No. 520- 3- Concrete Valley Gutter - per foot, Item No. 2520- 3- Concrete Valley Gutter - per meter. Item No. 520- 4- Special Concrete Gutter - per foot. Item No. 2520- 4- Special Concrete Gutter - per meter. Item No. 520- 5- Concrete Traffic Separator - per foot. Item No. 2520- 5- Concrete Traffic Separator - per meter. Item No. 520- 6- Concrete Shoulder Gutter - per foot. Item No. 2520- 6- Concrete Shoulder Gutter - per meter. Item No. 520- 70- Concrete Traffic Separator - per square yard. Item No. 2520- 70- Concrete Traffic Separator - per square meter. 01000-114 03- 4122.D � 4