(A) Bedding classes A, B or C, as described in SD-3, shall be used for all pipe provided the proper strength pipe is used with the specified bedding to support the anticipated load. Class of bedding shall be noted on the detailed plans or listed in the specifications. Installation procedures, as described in ASTM C12 (ANSI A106.2), shall be used for all rigid pipe provided the proper strength of pipe is used.
(B) The contractor shall begin at the lowest point in the line and shall lay the bell or groove ends pointing upstream. Each length of pipe shall be checked for defects and hairline cracks prior to lowering into the trench, and no defective pipe shall be used. Care shall be taken to protect the pipe and the joints from injury while handling and storing the pipe. The bell and spigot surfaces shall be clean of dirt and foreign matter before the joining of the pipe. The pipe shall be joined in strict accordance with the manufacturer’s recommendations. The contractor shall provide bell holes at each pipe joint to allow the barrel section of the pipe to support the full trench load.
(C) The engineer will provide grade at each structure and 50 foot upstream of each structure, or at closer intervals where ground surface prevents sight, on a one time only basis with the contractor paying for the replacement of any hubs destroyed by him or her. A laser beam shall be used to check sewer alignment and grade.