The drawing illustrates a floor opening (Fl. Opng.) measuring 4 feet 10 inches by 4 feet 10 inches within a slab or floor structure. Dimension strings and reference callouts, including a diamond tag labeled 1S2 and a rectangular tag labeled R2, establish the position and spacing relative to structural grids.
10' - 4" 14' - 8" 1' - 0" 1' - 0" 1S2 FL. OPNG. 4' - 10" 1' - 10" 10' - 0" FL. OPNG. 4' - 10" 7' - 6" 6" 8' - 0" 9' - 0" R2
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