(A) For sewer slopes 15% or greater, pipe shall be ductile cast iron. For sewer slopes between 15% and 25% key blocks shall be provided at every joint.
(B) When it is considered advisable in the judgment of the Chief Engineer, the sewer pipe shall be laid in a concrete cradle, in accordance with the Sanitation District No. 1 standards.
(C) Sewer pipe in creek beds shall be encased in concrete when it is considered advisable in the judgment of the Engineer. When the cover on such pipe is two feet or less, the pipe shall be ductile cast iron, encased as noted above.
(Ord. O-38-83, passed 12-20-83) Penalty, see § 50.999