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16. Tapping Sleeves. Tapping sleeves shall be of cast iron, of the split sleeve type with <br /> mechanical joint ends, and with a Class 125 outlet flange. The end gaskets shall be Duck- <br /> Tipped Rubber Gaskets and all end and side gaskets shall be totally confined to eliminate cold <br /> flow. The tapping sleeves shall be as manufactured by Mueller Company, Decatur, Illinois; <br /> American-Darling Valve Company; Clow, or equal. <br /> ' 17. Tapping Valves. Tapping valves shall be equal in all respects to the gate valves <br /> hereinbefore specified except that they shall come equipped with one end having a Class 125 <br /> Flange and the other end having a mechanical joint. <br /> ' 18. Valve Boxes. Valve boxes shall be of cast iron conforming to ASTM Specification A048, <br /> Class 35. They shall be of the extension type of a pattern approved by the Engineer. Size of <br /> valve box shall be suitable for size valve it is to serve and its bury. Valve boxes shall be as <br /> ' manufactured by James B. Clow Company, or equal, and shall have the word "WATER" cast <br /> on the top of the lid. <br /> 19. Manhole Rings and Covers. Manhole rings and covers shall be made of cast iron of <br /> ' superior quality, tough and of even grain, and will possess a tensile strength of not less that <br /> 18,000 psi. Rings and covers shall be manufactured in accordance with ASTM A-48-30. Rings <br /> will weigh not less than 190 lbs.,and covers will weigh not less than 120 lbs. The rings will be a <br /> ' maximum of 7 1/2" high, and have a minimum opening of V-10". The words "SANITARY <br /> SEWER" shall be cast in the center of the cover for sanitary sewer manholes and "STORM <br /> SEWER" for storm sewer manholes. The finished rings and covers shall have the bearings <br /> ' surfaces machined or ground so that there will be no variation that will permit rocking or rattling <br /> and the diameter of the covers shall be such as to fit the rings without wedging. All rings and <br /> covers will be thoroughly cleaned and given two coats of an approved bituminous paint. Rings <br /> shall have a solid cover on street work, and perforated on outfalls. <br /> 20. Manholes Steps. Shall be constructed of a reinforced molded polypropylene plastic shell. <br /> Reinforcing shall be a single #6 steel bar ASTM designation A615 grade 60 and equal in all <br /> ' respects to step PS-1 as manufactured by M.A. Ind., Inc. <br /> 21. Precast Manholes. Precast manholes shall be constructed of reinforced concrete and <br /> shall comply with the requirements of ASTM Designation C-478 "PRECAST REINFORCED <br /> ' CONCRETE MANHOLE SECTIONS". <br /> Shop drawings shall be submitted for approval prior to manufacture. Manholes shall be <br /> ' constructed with a monolithic base with the side wall extending at least 48" above the base; <br /> appropriate openings left in the side wall to receive the sewer pipe; barrel or raiser sections with <br /> a 48"maximum length; and a conical top section having a 24" diameter opening offset in such a <br /> manner that the edge of the opening is on a vertical line with the edge of the barrel or riser <br /> ' section. <br /> Manhole steps for precast manholes, unless otherwise approved by the Engineer, shall be as <br /> hereinbefore specified and shall be set at a spacing of 12"on centers,with one extra step set in <br /> the opposite wall of the conical section. <br /> ' Manhole rings and covers for precast manholes shall be as hereinbefore specified. Precast <br /> manholes shall be as constructed by N. C. Products Corporation, Raleigh, North Carolina, or <br /> approved equal. <br /> ' MATERIAL SPECIFICATIONS MS-5 <br /> 10/15/09 <br />