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d. The linkage shall pivot inside a solid''%" thick bar. The linkage shall accommodate <br />an adjustment to the diameter of the ring of 1/2" in either direction (larger or smaller). <br />e. The ring must be a single piece assembly, with no loose parts. <br />f. Riser must expand to obtain full circumferential engagement. <br />g. The riser shall not obstruct entrance to a manhole. There are no extensions to <br />hinder men or equipment using the manhole. <br />h. All moving parts and mating surfaces are zinc plated with dichromate finish or <br />stainless steel. Skirts are G90 galvanized. <br />i. Skirt must be welded 85% of the circumference of riser. <br />j. Manhole riser allows efficient application of the pivoted turnbuckle so that 60 lbs. <br />force applied 7" from center of turnbuckle exerts 5600# tangential force in the riser <br />ring. This enables the riser ring to be forced to fit worn out of round manhole lid <br />seats and still exert a great force on the side walls for holding power. <br />k. Manhole risers shall be color coded prior to delivery based on the following: <br />Ring Diameter <br />Color <br />20 3/4" D <br />Silver <br />21 3/4" D <br />Blue <br />22 1/8" D <br />Red <br />22 1/4" D <br />Yellow <br />23" D <br />Green <br />23 5/8" D <br />Black <br />25 1/2" D <br />Fluorescent Orange <br />26" D <br />Orange <br />26 1/2" D <br />Gold <br />2. The manhole cover and frame shall be the following: <br />a. Cover: East Jordan Iron Works manhole cover 1020A or approved equal <br />i. Manhole covers must be labeled "City of South Bend" with "Storm" or <br />"Sanitary" <br />b. Frame: East Jordan Iron Works manhole frame 1022Z1 or approved equal <br />3. The catch basin cover and frame shall be the following: <br />a. Cover: East Jordan Iron Works catch basin cover (grate) 1130M3 or approved <br />equal <br />b. Frame: East Jordan Iron Works manhole frame 1135Z or approved equal <br />XII. PART E: TRAFFIC MATERIALS <br />A. Prevailing specifications/INDOT Standard Specification Section: 808, 909, 921 <br />B. Additions: <br />1. Liquid Thermoplastic Traffic Marking paint: <br />Yer. 13 — 6101115 <br />