02-11-1985 Council Packet - Laserfiche WebLink

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24,000.2.r,5. Corrugated Metal_ t'iSe� Corrugated metal pipe shall he Joined using coupling hands in accordance with Minnesota Department of Transportation Specification 3226. 24,000.2.H. MANHOLE? AND CATCH BASIN FkAMES 6 _CO_VF_RS: Cast iron for both man- holes And catch basin frames And-c.�vers shell he of the beat Krnde of cast iron, free from all injurious dtrfectR and flaws and shall he Class 35 iron in accordance with A.S.T.M. Spec. A-48. Sand blasting prior to coal tar pitch Est varnish finish is required. Bath the surface (if the cover and frame in ca..- tact shall he machined for non -rocking protection. The words "SANITARY SFWFR" or "STORM SFWF.R" shall he cast on top of Hach manhole t•over in two inch let- ters where each is Applicable. All manhole castings shall he furnished with two concealed type pick holes of A design approved by tho Fngir.eer. The type, style and weight f all manhole castings, special coatings and catch k24,000.2.I. MANHOLE. STEPS ?4,000.2.I1. Cast_ Iron_Man_h_o_le StPps� Cast iron manhole steps shall he MAnu- facturod from hi -test, metal having a minim,im tensile strength 35,000 po+inds per square inch. All manhole steps shall ho Neenah Foundry Step No. R-1481J, Badger F-15 or equal. i1 24,000.7.12. Aluminum MAnhole Steps: Aluminum manhole steps cif a dneigr eim- +` ilar to the cast iron steps specified may he used. Aluminum manh,11e steps shall he made of Apex Ternalloy No. 5 aluminum alloy. i� 24,000.2..1. FRE-CAST CONCRETE M_A_NHOLF_S: Precast concrete manholes shall be used for all manholes more than 6. 5' deep from rim to top of pipe and shall t" conform to the requirements of A.S.T.M. Desig.-iation C-474. Segmental block may be used for the lower portion of manholes over large diameter pipe up to the top of the largest pipe. Unless otherwise stated, the internal diameter -hall be four feet. The upper section of tli manhole shall be reduced to a smaller diameter opening by use (.of an eccentric pre -cast cone made expressly Fo for this purpose. on manholes fi ft. deep and greater the precast section to- mediately below the cone section shall he one +11 font in height. The verti- cal wall of the cone shall he on the downstream side ,if the manhole, except for pipe 36 inches in diameter or strPAt. where steps will placed to pro- vide the most s,.iitable access. A of 2 rirlis and a maxisnim of four rings of adjustment shall he allow manholes shall he watertig!,r. Pre- cast manhole joints shall he rubber iring RAakj-t type. All manhole steps B3 shall he securely and neatly mortared in place. All lifting holes shall be neatly mortaredt up. Manh.tle haves may he- pro-caat or poured in place. Poured in place bases must be acceptably .tired before the manhole sections are placed on the hardened slah. The inverts of all manholes shall he shaped to the halt section of e(viivili-w sire pipe conformin¢ t,, the inlet and -wut1At pipe so as to Allow for a free uninterrupted flow with All surfaces glopinp to the tl,w line. Manholes may be supplied with preformed invette, a: i watertigt;t pier. connections for all lines 1," in diameter or emA11"r. 2/44/4554h rnpvright 14M4 bonestroo, Rosene, Anderlik 4 Associates, Inc.