b'Fire Rated AssembliesHorizontal Membrane SystemsRating Detail UL/GA # Description Sound Rating1 hr. I501 Steel studs, 6, 33 mil (0.0329, 20ga.), are spaced horizontal 16o/c andn/aHM 7100 attached to perimeter channels, with three layers of 5/8 FireBloc Type X wallboard applied perpendicular to the underside of the studs. Maximum horizontal span is 8 2-1/4, and assembly is re rated from either direction.1 hr. I504 Steel studs, 6, 33 mil (0.0329, 20ga.), are spaced horizontal 16o/c andn/aHM 7102 attachedtoperimeterchannels.Hangerwire(8ga.)attached/tiedto perimeterchannels24o/c,withthreelayersof5/8FireBlocTypeX wallboard applied perpendicular to the underside of the studs.2 hr. I502 Steel studs, 6, 33 mil (0.0329, 20ga.), are spaced horizontal 16o/c andn/aHM 7200 attached to perimeter channels, with three layers of 5/8 FireBloc Type X wallboard applied perpendicular to the underside of the studs. Two layers of 1-1/2 mineral ber insulation is laid on top side of steel studs. Maximum horizontal span is 8 2-1/4.2 hr. I505 Steel studs, 6, 33 mil (0.0329, 20ga.), are spaced 16o/c and attached to n/aHM 7203 perimeterchannels.Hangerwire(8ga.)attachedto perimeter channels 24o/c,withthreelayersof5/8FireBlocTypeX wallboard appliedperpendicular to the underside of the studs. Two layers of 1-1/2 mineral berinsulation is laid on top side of steel studs.2 hr. K506 Steel studs, 6, 33 mil (0.0329, 20ga.), are spaced horizontal 24o/c andn/aHM 7202 attached to perimeter channels, with three layers of 5/8 FireBloc Type C wallboard applied perpendicular to the underside of the studs. Resilient furring channels are then attached to steel studs 16o/c, with one additional layer of 5/8 FireBloc Type C wallboard applied perpendicular to the furring channels.Steel studs, 6, 33 mil (0.0329, 20ga.), are spaced 16o/c and attached to 1 hr. I508 perimeter channels, with three layers of 5/8 FireBloc Type C wallboardn/aapplied perpendicular to the underside of the studs. Horizontal span is determined by the metal manufactures limiting ceiling span chart.Steel studs, 6, 33 mil (0.0329, 20ga.), are spaced 16o/c and attached to perimeter channels, with three layers of 5/8 FireBloc Type C wallboard I508 applied perpendicular to the underside of the studs. Two layers of 5/8n/a2 hr. FireBloc Type C Wallboard are loosely laid perpendicular to the top side of steelstuds.Horizontalspanisdeterminedbythemetalmanufactures limiting ceiling span chart. 1.800.545.6302|americangypsum.com'