b'Fire Rated AssembliesMetal Framed Partitions (Non-load Bearing)continuedRating Detail UL/GA # Description Sound Rating2 hr. U421 Three layers 5/8 FireBloc Type X wallboard applied horizontal or vertical toSTC 51WP 1556 one side of a minimum 2-1/2, 18 mil, steel studs spaced 24o/c. OPPOSITE(RAL TL 10 279)SIDE: One layer of 5/8 FireBloc Type X wallboard applied to studs. Sound tested with 2-1/2 berglass insulation friction t in all stud cavities.U421 When sound tested with resilient furring channels attached to side of theSTC 56WP 1503 partition with one layer of 5/8 FireBloc Type X wallboard. (RAL TL 10 278)2 hr. V496 Two layers 5/8 FireBloc Type X wallboard applied horizontal or vertical onn/aWP 5051 both sides of a double row of 2-1/2, 18 mil steel studs spaced 16o/c. Lateral bracing on both sides of the wall not more than 5 feet o/c vertical.2 hr. V496 Two layers 5/8 FireBloc Type X wallboard applied horizontal or vertical onSTC 65WP 5051 both sides of a double row of 2-1/2, 18 mil steel studs spaced 16o/c. Lateral(RAL TL 10 355)bracing on both sides of the wall not more than 5 feet o/c vertical. Sound tested with 3-1/2 berglass insulation friction t in stud all stud cavities.2 hr. W458Two layers 5/8 FireBloc Type X wallboard applied horizontal or vertical toSTC 49(option A) onesideofa3-1/2,33mil(0.0329,20ga.),steelstudsat16o/c.(NOAL 19-0204)WP 1942.1 OPPOSITE SIDE: Base layer 5/8 FireBloc Type X wallboard applied horizontal or vertical. Face layer consists of cement backer board - 7/16, 1/2, 5/8, 3/4 or 1thick applied horizontal or vertical, with 3 mineral ber insulation batts friction t in stud space. Sound tested with 1/2 cement back boardW458Option B - OPPOSITE SIDE: Two layers of 7/16, 1/2, 5/8, 3/4 or 1thickSTC 54(option B) cement backer board, applied horizontal or vertical. Sound tested with two(NOAL 19-0205)layers of 1/2 cement backer boardW458Option CFace layer on each side of the partition, 7/16, 1/2, 5/8, 3/4 orSTC 47(option C) 1thick cement backer board, applied horizontal or vertical. Sound tested(NOAL 19-0206)with 1/2 cement backer board3 hr. V489 Three layers 5/8 FireBloc Type X wallboard applied horizontal or vertical ton/aWP 2751 each side of a minimum 1-5/8, 15 mil, steel studs spaced 24o/c.3 hr. V489 Three layers 5/8 FireBloc Type X wallboard applied horizontal or vertical toSTC 57WP 2751 each side of a 2-1/2, 15 mil, steel studs spaced 24o/c. Sound tested with(RAL TL 10 276)2-1/2 berglass insulation friction t in all stud cavities.4 hr. V489 Four layers 5/8 FireBloc Type X wallboard applied horizontal or vertical ton/aWP 2767 each side of a minimum 1-5/8, 15 mil, steel studs spaced 24o/c.4 hr. V489 Four layers 5/8 FireBloc Type X wallboard applied horizontal or vertical toSTC 59WP 2767 each side of a 2-1/2, 15 mil, steel studs spaced 24o/c. Sound tested with(RAL TL 10 277)2-1/2 berglass insulation friction t in all stud cavities.'