(a) Every manhole installed in this City, whether the same is of precast concrete or brick, shall have underneath an eight inch concrete base slab.
(b) The base slab shall be SHD Class "C" concrete.
(c) Where a precast concrete manhole is used the base ring shall be blocked up in the excavation with concrete brick and an eight inch concrete base slab shall be poured into the excavated bottom so that the concrete flows under, in back of and outside of the precast base ring.
(d) The provisions hereof shall apply whether the base slab is installed by this City, other governmental agency, contractor, private individual, partnership or corporation.
(Ord. 1970-14. Passed 3-18-70.)