Laserfiche WebLink
SECTION 5 – WATER WORKS <br />78 <br />5-3.4 (e) PIPE DEFLECTION <br />The maximum allowable deflection is equal to one-half (½) of the deflection allowed in AWWA <br />C600. If the alignment requires deflection in excess of the above limitations, special bends or a <br />sufficient number of shorter lengths of pipe shall be furnished to provide angular deflections within <br />the limits set forth. <br />5-3.4 (f) PIPE CUTTING <br />Cutting of pipe shall be done in a neat and professional manner without damage to the pipe. Unless <br />otherwise recommended by the manufacturer and authorized by the Engineer, cutting shall be done <br />with an approved type of mechanical cutter. A wheel cutter shall be used when practicable. <br />Squeeze type mechanical cutters shall not be used for ductile iron. <br />5-3.5 RESTRAINED JOINTS <br />Restrained joints shall be placed at fittings, upstream and downstream of the fitting, incorporating the <br />length of restraint as determined by the Design Engineer. <br />5-3.6 COVER REQUIREMENTS <br />The water main shall be installed with a minimum depth of cover of five (5) feet. The water main may <br />be required to be installed at a deeper depth to maintain the required eighteen (18) inches vertical <br />separation distance from sanitary and storm sewers. <br />5-3.7 SANITARY SEPARATION OF WATER MAIN <br />5-3.7 (a) PARALLEL INSTALLATION <br />Normal Conditions: Water mains shall be constructed at least ten (10) feet horizontally from any <br />existing or proposed sanitary sewer or storm sewer and at least eight (8) feet horizontally from any <br />manhole or inlet structure whenever possible. The distance shall be measured edge-to-edge. <br />Unusual Conditions: When local conditions prevent the prescribed horizontal separation, then <br />maximum horizontal separation shall be provided with vertical separation of bottom of water line <br />at least eighteen (18) inches above top of sewer. Where this vertical separation cannot be obtained, <br />the sewer shall be constructed of ductile iron pipe (Thickness Class 50) with mechanical joints or <br />PVC pipe (SDR 26 or SDR21) with compression seals. The pipe should be pressure tested in place <br />per AWWA C600 without leakage before backfilling. <br />5-3.7 (b) CROSSING <br />Normal Conditions: Water mains crossing any existing or proposed sanitary or storm sewer shall <br />be laid to provide a minimum vertical separation of at least eighteen (18) inches between the <br />outside of the water line and the outside of the sewer whenever possible.