Cross-sections of a trench drain frame and its matching grate unit. The frame profile measures forty-three inches across the base flange, with an interior clear opening of thirty-six inches and an overall top width of thirty-six and one-half inches. The trench depth accommodates a two-inch drop into the seating shoulder, with typical five-eighth-inch clearance slots. The corresponding grate section spans thirty-five and one-half inches overall with a thirty-three-inch interior width, featuring twelve equal spaces at two and thirteen-sixteenths inches and sixty-degree angled drainage slots.
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