(A) General. All precast concrete structures to be used on the project shall be structurally sound and free of defects. Any spelled concrete or voids shall be properly repaired using equivalent strength grout and properly cured before placement. Structures showing excessive cracking of damage should be rejected and shall be replaced at the discretion of the town.
(B) Concrete strength. All concrete used in the production of precast inlets and catch basins shall have a minimum compressive strength of 4,000 psi at 28 days.
(C) Inlets and catch basins.
(1) All precast inlets and catch basins shall be manufactured in accordance with ASTM C478 and the state’s Department of Transportation (IDOT) “Standard Specifications”.
(2) Reinforced concrete pipe used as inlets or catch basins shall meet the requirements for concrete storm sewer pipe specified in division (B) above.
(3) Where practical, inlets and catch basins shall be of standard size and dimensions as identified by the IDOT standards.
(D) Castings.
(1) Castings for inlets and catch basin shall be made of either gray or ductile iron. Metal used in the manufacture of castings shall conform to ASTM A48 Class 35B for gray iron or ASTM A536 Grade 65-45-12 for ductile iron.
(2) Castings shall be of uniform quality, free from blowholes, shrinkage, distortion or other defects.
(3) Castings placed in roadways, drives or other locations subject to vehicular traffic shall be heavy duty type, suitable for the applicable loadings.
(4) Castings shall be as manufactured by Neenah Foundry Company, East Jordan Iron Works or equal.
(2004 Code, Art. IV, § B, part 2)