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I <br /> 1 2 <br /> 3 DIVISION7.GR7 <br /> 4 Division 7 <br /> I5 Drainage Structures, Storm Sewers, Sanitary <br /> 6 Sewers, Water Mains, and Conduits <br /> I 8 <br /> 8 7-05.DOCX <br /> 9 Manholes, Inlets, Catch Basins, and Drywells <br /> 10 <br /> I 11 7-05.3.DOCX <br /> 12 Construction Requirements <br /> 13 <br /> I 14 GLF 7-05.3(1).DOCX <br /> 15 Adjusting Manholes and Catch Basins to Grade <br /> 16 <br /> 17 Section 7-05.3(1)of the standard specifications is deleted and replaced with the following: <br /> 18 <br /> I 19 (******) <br /> 20 In most work locations, planing depth is equal to overlay depth. Therefore, significant <br /> 21 iron adjustment is not anticipated, and adjustment of structures to grade shall occur <br /> I 22 only as needed and/or directed by the engineer. <br /> 23 <br /> 24 Manholes, catch basins, and other structures shall not be adjusted to grade until the <br /> I 25 pavement is completed, at which time the center of each structure shall be carefully <br /> 26 relocated from references previously established by the Contractor. The structure <br /> 27 shall then be brought to proper grade as follows: <br /> I 28 <br /> 29 1. The existing cast iron ring and cover on manholes and existing cast iron frame <br /> 30 and grates for catch basins and inlets shall be removed and thoroughly <br /> 31 cleaned before reinstalling at the new elevation. <br /> I 32 <br /> 33 2. The asphalt concrete pavement shall be cut and removed to a new circle, the <br /> 34 diameter of which shall be equal to the outside diameter of the cast iron frame <br /> I 35 plus 2'. <br /> 36 <br /> 37 3. The roadway surface materials and crushed rocks shall be removed so the <br /> I 38 structure casting can be adjusted to the finished road grade elevation. <br /> 39 <br /> 40 4. The cast iron frame shall be placed on concrete blocks and wedged up to the <br /> I 41 desired grade with plastic wedges. <br /> 42 <br /> 43 5. The edges of the asphalt concrete pavement and the outer edge of the <br /> 44 castings shall be painted with tack and HMA Class '/2" PG 64-22 shall be <br /> I45 placed and compacted in layers to a minimum of 91% of the maximum <br /> 46 theoretical density of the HMA. <br /> 47 <br /> I 48 The completed patch shall match the existing paved surface for texture, density, and <br /> 49 uniformity of grade. The joint between the patch and the existing pavement shall <br /> 1 <br /> 2021 PAVEMENT MAINTENANCE OVERLAY PAGE 71 OF 84 DIVISION T <br /> IWORK ORDER 3751 MARCH 29,2021 <br />