Suspended acoustical tile ceiling edge details featuring a perimeter closure angle secured to the wall with a 7/8-inch horizontal flange and 3/4-inch vertical drop. Hanger wires are spaced at 48 inches on center, positioned a maximum of 8 inches from the perimeter. Main and cross runners intersect via cross tee slots and tie into seismic perimeter clips. A note specifies that these measures are required for acoustical tile ceilings greater than 144 square feet.
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