(a) Pipe and Fittings. Pipe and fittings shall be of vitrified clay, of standard weight and conform to ASTM specifications C13-54, unless the load on the pipe requires higher strength, complete with a joint conforming to ASTM specification C-425, Type III or shall be P. V. C. as specified in Section 911.111 of the Codified Ordinances.
(Ord. 86-49. Passed 6-23-86.)
(b) Manholes. The manhole base shall be an eight-inch thick poured concrete mat reinforced with six-inch by six-inch No. 6 wire mesh, unless soil conditions indicate a heavier construction. The manholes shall be constructed of common hard clay or shale brick and laid up with a one to two cement mortar to which may be added lime not to exceed twenty-five percent by volume of the cement. The outside shall be plastered and troweled with one inch of waterproof cement mortar. The inside shall be rubbed with a cloth in lieu of striking the joints. The minimum diameter of the manhole shall be four feet.
All brick shall be thoroughly cleaned and saturated with water immediately before being laid up. The brick shall be laid up radially in header courses, with the joint broken by staggering each successive course. Each fifth course shall be a stretcher course.
The manhole frames and covers shall be cast iron, heavy duty, solid cover, with a minimum clear opening twenty-one inches in diameter. The frames shall be so set that the top of the cover is flush with the finished grade of the roadway, or to a determined elevation shown on the drawings.
The manhole steps shall be cast iron. The invert channels shall be smoothed and accurately shaped to a semicircular bottom conforming to the inside of the adjacent sewer section. Wherever possible, the inverts shall be constructed by laying channel pipe through the manhole or sewer pipe and then breaking out the upper half after the concrete base has been poured to the center line of the pipe. Pipe shall not protrude into the manhole and shall be cut flush with the inside face of the manhole.
City Standards, Appendix A, shall be followed.
Precast concrete manholes may be used if approved. Detail drawings will be required for such approval.
(c) Pipe Laying. The bedding of No. 6 limestone or slag shall be placed in such a manner as to assure full support along the lower quadrant of the pipe barrel only and not in the bells. As the pipe is laid, each length shall be checked for alignment and grade. Pipe laying shall proceed upgrade with spigot ends pointing in the direction of flow.
A defective pipe or pipe which has had its line or grade disturbed sufficiently to open the joint after laying, shall be taken up and replaced. All open ends in the pipe shall be stopped. Stoppers shall have the same joints as the sewer pipe and shall be installed in wyes as the work progresses and in the pipe line when the work is not in progress.
Wye branches shall be installed for each property and a record of actual locations shall be given to the Director of Public Service so that they may be recorded. All wyes shall be closed with stoppers described above. In new developments, branch lines from main line wyes for house sewers shall be installed from the main to the sideline of the street right of way, at the time of installing the main sewer.
(Ord. 69-35. Passed 10-27-69.)