Civil · C-33HGF

Type 1 Catch Basin

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The Type 1 catch basin assembly consists of a precast concrete base section, a rectangular adjustment section, and a matching frame and grate. The precast base section features interior dimensions of twenty-six inches by twenty-two inches with a height of forty-four inches, wall thicknesses of four inches minimum, and circular pipe knockouts. Reinforcement includes a number three bar in each corner with eighteen inches minimum embedment and a number three bar hoop. The rectangular adjustment section measures thirty-four inches by thirty inches externally with a twenty-four by twenty-inch interior opening and a height of six or twelve inches, reinforced with one number three bar hoop for six-inch sections and two number three bar hoops for twelve-inch sections. A pipe allowances schedule defines maximum inside diameters for reinforced or plain concrete, metal, CPSSP, solid wall PVC, profile wall PVC, and corrugated polyethylene storm sewer pipes.

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