A cast-in-place or precast concrete catch basin and junction box is detailed in plan and section, featuring a twenty-four by thirty-six inch interior clear dimension and six-inch thick concrete walls reinforced with number four rebar spaced at twelve inches on center. The concrete box is set beneath grade and surrounded by a concrete collar and asphalt paving. A twenty-seven and a quarter by twenty-five inch frame is constructed from quarter-by-two-and-a-half-inch side bars and angle iron ends using painted A-36 steel bars. The removable grate measures twenty-six and a quarter by twenty-three and fifteen-sixteenths inches, fitted with five-sixteenth-inch diameter hot-pressed rods at four inches on center, and designed to comply with H-20 highway loading. Four anchors secure the box assembly, and pipe entries are placed as indicated on plans.
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