pf_01916 - Laserfiche WebLink

Home

SECTION 02665 WATER SYSTEM Degree of Deflection 6" Dia. 8" Dia. 10" Dia. 12" Dia. 18" Dia. 24" Dia. 36" Dia. 22_1/20 - - _ - 7 L.F. 9 L.F. 13 L.F. 450 5 L.F. 7 L.F. 10 L.F. 14 L.F. 26 L.F. 34 L.F. 49 L.F. 67-1/20 11 L.F. 15 L.F. 21 L.F. 28 L.F, 54 L.F. 71 L.F. 104 L.F. 90°(Dead End) 17 L.F. 23 L.F. 34 L.F. 46 L.F. 87 L.F. 114 L.F. 168 L.F. F. The Contractor shall maintain the line and grade of the pipe in the trench by means of the grade or batter board method. Not less than two boards ahead and one board behind the working point shall be set at any time and, as each new board is set, it shall be visualy checked with the proceeding boards. If the boards have been correctly set and the error is yet apparent, the Surveyor shall be notified immediately so the staking may be checked. Failure to notify the Surveyor shall put the full responsibility of correcting the line and grade on the Contractor. 1. The boards shall be level at all times and located far enough from the trench so that subsidence of the ground adjacent to the trench will not cffc�:t their position. The chalk lines shall be kept taut and shall be set at a minimun distance of five feet apart. G. When tapping a lateral watermain or service to an existing watermain, the Contractor shall be required to make connection to the exiting watermain while the existing watermain is under pressure (i.e., wet tap) using an AWWA Approved drilling machine, tapping sleeve and tapping valve. Conductivity must be maintained from the main that was tapped to the new main by whatever methods necessary. A connection to an existing watermain by methods other than a wet tap can be done only with approval of the Architect or if specifically shown on the plan. The Contractor shall verify the size of the existing watermain prior to ordering the fittings for the connection. 3.04 BACKFILLING AND GRADING A. After the pipe has been laid, inspected and blinded, the trench backfill shall be placed in 12" lifts and compacted by pneumatic tampers, tamping rollers or vibrating rollers. Each lift shall be thoroughly compacted before succeeding lifts are placed. backfill material shall be mineral soil free of sod, roots, topsoil, stones over 6" in greatest dimension, frozen lumps, and all other extraneous material. B. Where granular soils are used for backfill, the thickness of lifts may be increased to limits determined by the Engineer. C. Trenches will be back€illed with select backfill material only in areas where indicated on the Drawings or by the Engineer. 5 KKE1186