An optional knock-out location layout is defined by twenty-five-foot and fifteen-foot typical dimensional increments relative to a grid or reference line. Dashed boundary lines indicate the perimeter of the opening, marked with diagonal crossing lines and the text note reading optional knock-out location above and below.
25' - 0" TYP. 15' - 0" TYP. OPTIONAL KNOCK-OUT LOCATION ABOVE AND BELOW
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