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3.1 MANHOLE AND CATCH BASIN STRUCTURES <br /> A. Miscellaneous Work <br /> 1. If concrete adjusting rings are used, plaster all manhole adjusting rings installed inside and out,with a <br /> minimum thickness of%-inch of mortar. A maximum of 3 individual adjusting rings shall be used. <br /> Taller 6.0-inch or 12.0-inch rings shall be used where adjustment requires more than three 2.0-inch <br /> rings. <br /> 2. If HDPE adjusting rings are used,the sealant material and method shall be in accordance with <br /> manufacturer's recommendations. <br /> ****END OF SECTION**** <br /> City of Elk River-R13.119052 CASTING ASSEMBLY <br /> August 2019 PAGE 02630-2 <br /> V122617©Bolton&Menk,Inc.2019,All Rights Reserved <br />