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A. Precast manhole sections used for the wet well shall conform to the wet well details shown on <br /> the Plans and shall - consist of a precast base cast poured monolithically with a minimum three <br /> foot length of barrel section. Additional barrel sections shall also be a minimum three feet <br /> in length. All concrete used in the construction of precast sections shall utilize Type II <br /> cement and have a 28 day compressive strength of 4,000 pounds per square inch . The precast <br /> sections shall conform with all applicable requirements of Division 03 of these specifications . <br /> 2 . 13 PRECAST CONCRETE VAULTS <br /> B . Precast concrete vaults shall conform to the vault details shown on the Drawings and <br /> shall consist of a precast monolithic base section and top slab . All concrete used in <br /> the construction of precast sections shall utilize Type II cement and have a 28 day <br /> compressive strength of 4, 000 pounds per square inch. The precast sections shall <br /> conform with all applicable requirements of Division 03 of these specifications . . <br /> 2 . 14 MISCELLANEOUS HARDWARE <br /> A. All hardware, bolts , anchors , accessories in the wet well and valve vault shall be stainless <br /> steel . <br /> B . Safety Netting — The wet well opening shall be provided with a rail mounted safety net <br /> system designed to be installed to the access hatch . The safety net shall easily slide on the <br /> guide rails to facilitate entry and then repositioned to prevent fall through . The net system <br /> shall be manufactured to fit the 300# access hatch specified in paragraph 2 . 10 above. The net <br /> system shall be manufactured of durable synthetic netting with all mounting and rail <br /> components constructed of stainless steel . The net system shall be as manufactured by "U. S . <br /> Netting" , Hatch net 121 System , or approved equal. <br /> 2. 15 PIPE AND FITTINGS <br /> A. Pipe : <br /> 1 . Ductile iron pipe shall conform to AWWA C151 (ANSI A21 .51 ) and shall be <br /> minimum pressure class 350 unless specified otherwise or shown otherwise on the <br /> Drawings . Pipe shall be furnished in standard 18 or 20 foot lengths unless shown <br /> otherwise on the Drawings . External surfaces of DI pipe shall be coated with a <br /> minimum 10 mil thickness of "Kop-Coat" Bitumastic 300M or Protech EP214 Epoxy <br /> Mastic or approved equivalent. Internal surfaces shall be coated to a minimum <br /> thickness of 40 mil with McWane's Protecto 401 ceramic lining or approved equal . <br /> I I J <br /> 2 . Polyethylene pipe shall be new , unused, sections of polyethylene pipe having a <br /> nominal density of 0 . 955 . The polyethylene resin used to manufacture the pipe shall . <br /> have a "Plastic Pipe Institute" material designation of PE 3408 , with an ASTM <br /> D3350 cell classification of 34544C . The pipe shall be black in color, containing <br /> approximately 2 percent U .V. stabilizer. Pipe shall be extruded to the wall thickness <br /> described in AWWA C906 for DRI 1 . Pipe outside dimensions shall meet that of <br /> ductile iron pipe size (D .I . P . S .) . Pipe shall be provided in nominal 40 foot long <br /> sections or pre-cut for the project . <br /> During the extrusion process, the HDPE pipe shall be continuously marked with <br /> durable printing including the following information : <br /> 02539 — Submersible Pump Station ( Rev. ) <br /> 02539-9 <br />