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1 <br /> 1 <br /> 2 <br /> 3 DIVISION7.GR7 <br /> 4 Division 7 <br /> 5 Drainage Structures, Storm Sewers, Sanitary <br /> 6 Sewers, Water Mains, and Conduits <br /> 7 <br /> 8 7-05.DOCX <br /> 9 Manholes, Inlets, Catch Basins, and Drywells I <br /> 10 <br /> 11 7-05.3.DOCX <br /> 12 Construction Requirements I <br /> 13 <br /> 14 GLF 7-05.3(1).DOCX <br /> 15 Adjusting Manholes and Catch Basins <br /> 16 <br /> 17 Section 7-05.3(1) of the standard specifications is deleted and replaced with the <br /> 18 following: <br /> 19 <br /> 20 (******) <br /> 21 In most work locations, planing depth is equal to overlay depth. Therefore, <br /> 22 significant iron adjustment is not anticipated, and adjustment of structures to grade <br /> 23 shall occur only as needed and/or directed by the engineer. <br /> 24 <br /> 25 Manholes, catch basins, and other structures shall not be adjusted to grade until <br /> 26 the pavement is completed, at which time the center of each structure shall be <br /> 27 carefully relocated from references previously established by the Contractor. The <br /> 28 structure shall then be brought to proper grade as follows: <br /> 29 <br /> 30 1. The existing cast iron ring and cover on manholes and existing cast iron <br /> 31 frame and grates for catch basins and inlets shall be removed and <br /> 32 thoroughly cleaned before reinstalling at the new elevation. <br /> 33 <br /> 34 2. The asphalt concrete pavement shall be cut and removed to a new circle, <br /> 35 the diameter of which shall be equal to the outside diameter of the cast iron <br /> 36 frame plus 2'. <br /> 37 <br /> 38 3. The roadway surface materials and crushed rocks shall be removed so the <br /> 39 structure casting can be adjusted to the finished road grade elevation. <br /> 40 <br /> 41 4. The cast iron frame shall be placed on concrete blocks and wedged up to <br /> 42 the desired grade with plastic wedges. <br /> 43 <br /> 44 5. The edges of the asphalt concrete pavement and the outer edge of the <br /> 45 castings shall be painted with tack and HMA Class 1/2" PG 64-22 shall be <br /> 46 placed and compacted in layers to a minimum of 91% of the maximum <br /> 47 theoretical density of the HMA. <br /> 48 <br /> 49 The completed patch shall match the existing paved surface for texture, density, <br /> 50 and uniformity of grade. The joint between the patch and the existing pavement <br /> 51 shall then be carefully painted with hot asphalt cement or asphalt emulsion and <br /> HOT MIX ASPHALT OVERLAY-2018 PAGE 42 OF 57 March 6,2018 <br /> WORK ORDER#3667 <br /> SPECIAL PROVISIONS111 <br />