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DocuSign Envelope ID:070B6BC7-CDE2-4AO8-BE62-07FA6BFDO53B <br /> 11/20/2020 <br /> 3.2 PIPING INSTALLATION <br /> A. General Locations and Arrangements: Drawing plans and details indicate general location and <br /> arrangement of underground storm drainage piping. Location and arrangement of piping layout <br /> take into account design considerations. Install piping as indicated, to extent practical. Where <br /> specific installation is not indicated, follow piping manufacturer's written instructions. <br /> B. Install piping beginning at low point, true to grades and alignment indicated with unbroken <br /> continuity of invert. Place bell ends of piping facing upstream. Install gaskets, seals, sleeves, and <br /> couplings according to manufacturer's written instructions for use of lubricants, cements, and <br /> other installation requirements. <br /> C. Install manholes for changes in direction unless fittings are indicated. Use fittings for branch <br /> connections unless direct tap into existing sewer is indicated. <br /> D. Install proper size increasers, reducers, and couplings where different sizes or materials of pipes <br /> and fittings are connected. Reducing size of piping in direction of flow is prohibited. <br /> E. When installing pipe under streets or other obstructions that cannot be disturbed,use pipe jacking <br /> process of microtunneling. <br /> F. Install gravity-flow,nonpressure drainage piping according to the following: <br /> 1. Install piping pitched down in direction of flow. <br /> 2. Install piping to invert inverts shown on Drawings. <br /> 3. Install piping per local, state and manufacturer recommendations. <br /> 3.3 STORM DRAINAGE STRUCTURES <br /> A. General: Install junction boxes, catch basins and drop inlets according to local, state and <br /> manufacturer recommendations. <br /> B. Install precast concrete manhole sections with sealants according to ASTM C 891. <br /> C. Where specific manhole construction is not indicated, follow manhole manufacturer's written <br /> instructions. <br /> D. Set tops of frames and covers flush with finished surface of manholes that occur in pavements. <br /> Set tops 3 inches above finished surface elsewhere unless otherwise indicated. <br /> E. Where drop inlets are called for along the edge of proposed pavements,the drop inlet casting shall <br /> be set parallel and immediately adjacent to the edge of the pavement, so as to result in a neat <br /> finished appearance. <br /> F. Storm structure inverts shall be constructed as shown in the Drawings. <br /> G. Riser structure shall be placed at exact elevation shown in the Drawings. <br /> H. Cleanout structures shall be constructed at the exact location shown in the Drawings. <br /> 3341 00 STORM UTILITY DRAINAGE Page 2 of 3 <br /> PIPING <br />