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<br />II <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />SBCTION 6.0 STORK SEWERS <br /> <br />6.1 Introduction <br /> <br />storm sewers are required when the other parts of the drainage <br />system, primarily curb, gutter, and roadside ditches no longer have <br />capacity for the additional stormwater runoff. <br /> <br />Except as modified herein, the design of storm sewers shall be in <br />accordance with the USDCM section on "storm Sewers". Reference is <br />made to follow specific sections in the USDCM for clarity. The <br />user is referred to the USDCM and any other references cited for <br />additional discussion and basic design concepts. <br /> <br />6.2 Construction Materials <br /> <br />All storm sewers within the City shall be constructed using one of <br />the following materials and meet applicable standards as presented <br />below: <br /> <br /> STORK SEWBR STANDARDS <br /> pipe Material standard <br />Reinforced Concrete (RCP) ASTM C-76/C-S06/C-S07/C-789/C-850 or <br /> AASHTO M-170/M-206/M-207/M-259/M-273 <br />Plastic Pipe (PVC) AWWA C-900, ASTM D- <br /> 1784/2412/2422/2444/2855/3213 and <br /> ASTM F-402 <br /> Corrugated steel AASHTO M-36/167/190/218/243/245/246/264/289 <br /> ASTM A444/742/760/761/762/806/819/849/885 <br /> and 01056 <br />High Density Polyethylene Designed in accordance with AASHTO <br /> Pipe (HDPE) Engineering Design Manual Section <br /> 18 with rubber water-tight joints <br />Corrugated Aluminum AASHTO M-196/l97/219 <br /> <br />At the option of the contractor, non-reinforced concrete pipe <br />conforming to ASTM-C14 and AASHTO M 86 may be used in lieu of <br />reinforced concrete pipe for all sizes 36 inches in diameter and <br />smaller, provided it meets the same D-load to produce the ultimate <br />load under the three-edge bearing method as specified for <br />reinforced concrete pipe in accordance with AASHTO M170, and the <br />contractor provides written certification that it does so. Wall <br />thickness of pipe may be increased as required to meet D-load <br />requirement. <br /> <br />6 - 1 <br />