Mission Viejo Municipal Code Div. 8 Precast Portland Cement Concrete Manholes

(a) Precast portland cement concrete manhole risers and tops shall be constructed of Class A concrete and shall conform to the specifications of A.S.T.M. Designation C-478 except as herein modified.

(b) The applicant shall submit shop drawings of the precast manhole he proposes to use for the approval of the department.

(Ord. No. 88-12, § 9(7-4-197), 6-27-88)

(a) The minimum nominal shell thickness for formed and vibrated sections shall be one-eighth of the internal diameter of the riser or largest cone diameter, and for centrifugally spun sections 1/12 of the internal diameter of the riser or largest cone diameter.

(b) Manholes shall be fabricated only from eccentric taper sections or eccentric flat top sections and standard cylinder units of the proper internal diameter. The minimum allowable steel shall be hoops of No. 4 wire, to be cast into each unit at adequate places as a precautionary measure for handling.

(c) The manhole sections shall be cast without ladder rungs.

(Ord. No. 88-12, § 9(7-4-198), 6-27-88)