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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 />20 314" D <br />Silver <br />21 314" D <br />Blue <br />22 118" D <br />Red <br />22 114" D <br />Yellow <br />23" D <br />Green <br />23 518" D <br />Black <br />25 112" D <br />Fluorescent Orange <br />26" D <br />Orange <br />26 112" D <br />Gold <br />XIX. DIVISION E: TRAFFIC MATERIALS <br />B. Prevailing specificationsllNDOT Standard Specification Section: 808, 909, 921 <br />C. Additions: <br />1. High Build Fast Dry Waterborne Traffic Paint: <br />a. High Build Fast Dry Waterborne Traffic Paint must meet and exceed the chemical <br />composition and performance requirements of Federal Specification TT -P -1952F <br />Type III. <br />b. High Build Fast Dry Waterborne Traffic Paint must be environmentally friendly 100% <br />acrylic emulsion traffic paint containing less than 100 grams per liter volatile organic <br />content (VOC). <br />c. High Build Fast Dry Waterborne Traffic Paint must meet or exceed TT -P -1952F <br />Type III when tested in accordance with the following ASTM test methods: D2369, <br />D562, D2697, D3723, D2805, D711, D1210, D969, D1849, D522, D2243, D1729, <br />D968, D2486, D1394, D1640, D2244, D3335, D3718, E1347, G154. <br />d. Coverage is to be 320 ft. of 4 -inch line per gallon at 30 mils wet film thickness. <br />Precautions: Both surface and ambient application temperatures shall be a <br />minimum of 50°F. Temperature shall not drop below 50°F within a 24-hour period <br />following application. The shelf life of the paint shall be a minimum of 12 months. <br />Version 09/29/2021 Special Provisions - 9 <br />