719— Catch Basins, Inlets, and Manholes

719.1 Description

1 Provide and install catch basins, drop inlets, manholes, junction boxes, and spring boxes .

719.2 Materials

719.2.1 Cast -in-Place Concrete

1 Provide Class 4000 for cast -in-place concrete conforming to Section 701 .

719.2.2 Clay or Shale Brick , Concrete Brick, and Concrete Block

1 Provide c lay or shale brick , concrete brick, and concrete block conforming to Subsection 718.2.

719.2.3 Mortar Materials

1 Provide m ortar materials conforming to Subsection 718.2.5 .

719.2.4 Castings

1 Provide iron castings for frames, grates, covers, etc., conforming to AASHTO M 105, Class 35B, and the alternative load test conforming to AASHTO M 306 . 2 Produce castings in closed molds and boldly filleted at angles. Ensure that the arises are sharp and perfect and ensure that they are true to pattern in form and dimensions, free from pouring defects, sponginess, cracks, blow holes, and other defects affecting their strength and value for the service intended. Ensure that the castings are clean and neatly finished. Ensure that gratings and covers fit firmly into their respective frames. 3 Steel grates and frames may be used instead of cast iron if the loading and hydraulic requirements are met and they conform to the following: • Hot dip zinc coat steel grates and frame according to AASHTO M 111 . • Dimension steel grates and frame to be interchangeable with each piece of the cast iron grate and frame shown on the Plans. • Provide steel grates and frames of sufficient strength to meet or exceed the loading requirements of Federal Specification RR -F-621. 4 Ensure that the manufacturer has a testing program to verify that the castings comply with the strength requirements of AASHTO M 105 . Ensure that test bars are Type B and are made and tested according to AASHTO M 105.