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    The two-part Ceiling Support/Firestop is designed to provide support and firestopping for vertically oriented systems passing through ceilings and floors. Consisting of a plate assembly and a separate support collar, the assembly also provides the specified 3” airspace clearance to framing members. The 3" Ceiling Support/Firestop requires 9 5/8” and 10 5/8” by 10 5/8” square framed openings, respectively. A ceiling support/firestop spacer is required to be installed in a properly framed opening at each ceiling/floor level except for the roof. Outside Plate dimension 12 ½” square.