2014-378 Planning - J. F. Wilkerson Contracting for Morinaga America Infrastructure Improvements $747,840

Browse Search

PVC Sewer Pipe shall be installed in accordance with ASTM D-229 - Standard Recommended Practice for Underground Installation for Flexible Thermoplastic Sewer Pipe. PVC Sewer Pipe ' shall be tested by the contractor for deflection. The pipe shall be mandrelled with a rigid device sized to be cylindrical in shape and constructed with 9 to 10 evenly spaced arms. The mandrel shall be hand pulled by the contractor through all sewer lines. Any sections of sewer not ' passing the mandrel shall be uncovered and the contractor shall reround or replace the sewer and retest that section of line. The contractor shall submit mandrel drawings and testing schedule to the engineer for approval. The mandrel[ shall be sized for a 6%a deflection allowance. ' 93. Pipe Laying -Ductile Iron Sanitary Sewer Mains. Wherever, in the laying of sanitary sewer lines, the pipe must be supported on piers or where the pipe crosses under a highway that , cannot be open cut, or in shallow trenches where insufficient cover conditions exist,the Sanitary sewer lines shall be of ductile iron pipe. The material for laying and jointing the pipe shall conform to the specifications hereinbefore given for Ductile Iron Pipe. The ductile iron will be paid for at the unit price bid for the different sizes of pipe installed in the various pipe laying ' conditions. Force mains shall be of size and type as shown on the drawings and shall be installed in conformance to"Pipe Laying-General Conditions". 94. Precast Concrete Manholes. Precast concrete manholes shall be built where shown on the plans or as directed by the Engineer. The inside diameter of the manholes shall be at least four feet(4'). inverts will be built up to a depth of three-quarters (3/4) of the diameter of the pipeline as directed to properly take care of the flow through the manholes and to ease the drop from one pipe to the other. Benches shall be sloped for drainage, as shown of the Plans. Manholes shall be provided with flexible sleeves sealed with stainless steel bands at each pipe entering or exiting a manhole. ' Joints between sections of the precast manhole shall be sealed with a Neophrene "O" Ring Gasket and bitumastic rope. Manholes shall be bedded on layer of crushed stone. The stone ' shall be the same as that specified for stabilizing ditches (Size No. 67), and shall be spread in a layer at[east six inches(6")thick. The manholes shall be capped with cast iron manhole frames and covers with the frames set in ' mortar with even bearing. The C.I. Frame shall be anchored to the manhole wall as shown on the plans. After completion,all manholes will be cleaned out and left in a neat condition with all jointing material protruding from joints flattened against the wall. Open riser joints shall be grouted. Any infiltration into the manhole will not be allowed. 16. Drop Manholes. Whenever the vertical distance between outgoing and incoming sewers is more than 2.0 feet, the Engineer will require that a special drop pipe be built into the manhole. This drop shall consist of a T branch in the main sewer where it enters the manhole, and a vertical drop pipe down the side of the manhole and supported therefrom and terminating at the bottom by a quarter bend into the manhole. All piping and fittings shall be of ductile iron pipe. ' Drop pipe shall be Ductile Iron Pipe and fittings strapped to manhole wall with 1" stainless steel straps and masonry anchor bolts. ' 16. Connections to Existing Sewage Collection System. Connections to existing sewage collection systems shall be made where shown on the Plans or as directed by the Engineer. Where the connection is made at an existing manhole, it will be necessary to reconstruct the ' existing invert(s)to accommodate the new line. SANITARY SEWER LINES: DETAILED SPECIFICATIONS FOR INSTALLATION SS-6 ' 10/15/09