This fire-rated ceiling assembly features twelve-and-a-half millimeter thick gypsum ceiling board with a paint finish attached to nineteen by twenty-five by zero-point-five millimeter galvanized steel joists spaced at three hundred millimeters on center. The joists are supported by thirty-eight by twelve by one-point-two millimeter galvanized steel joist supports spaced at nine hundred millimeters on center. The entire framework is suspended by nine-millimeter diameter steel hanger rods spaced at nine hundred millimeters on center with steel hanger rod reinforcement. At the perimeter, the ceiling meets a scheduled partition wall line via a PVC wall molding with a ten-millimeter clearance.
SCHEDULED PARTITION WALL LINE PVC WALL MOLDING 10 12.5mm THICK GYPSUM CEILING BOARD WITH PAINT FINISH 9mm DIA STEEL HANGER ROD REINFORCEMENT 9mm DIA STEEL HANGER ROD @ 900 O.C. 38x12x1.2mm @ 900 O.C. GALV STEEL JOIST SUPPORT 9mm DIA STEEL HANGER ROD REINFORCEMENT 9mm DIA STEEL HANGER ROD @ 900 O.C. 19x25x0.5mm @ 300 O.C. GALV STEEL JOIST 19x25x0.5mm @ 300 O.C. GALV STEEL JOIST 38x12x1.2mm @ 900 O.C. GALV STEEL JOIST SUPPORT 150 GRAPHIC SCALE SCALE 1 : 10 C7 FIRE RATED CEILING ASSEMBLY
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