| 1. | Topping (Optional): Lightweight concrete or proprietary topping. |
| 2. | Sub-Flooring: Minimum 5/8" plywood or oriented strandboard (OSB) when topping is used, otherwise 3/4" thickness is required. Plywood installed perpendicular to joists with end joints staggered, fastened in accordance with Code requirements. |
| 3. | Structural Members: Nordic I-joist, minimum joist depth 9-1/4", minimum flange dimension 1-1/2" by 2-1/2", installed at 24" oc maximum. |
| 4. | Resilient Channels: Nominal 24 gauge galvanized steel channels installed perpendicular to joists and spaced 16" oc maximum. Additional channels required at gypsum wallboard end joints such that each board end rests on its own channel. These additional channels shall extend to the next joist on each side of the board edges. Channels fastened with 1-5/8" long Type W screws at teach joist intersection. |
| 5. | Gypsum Board: One layer of 5/8" Type C gypsum wallboard installed perpendicular to channels with end joints staggered 48". Boards to be fastened to channels with minimum 1-1/8" Type S screws located 7" oc. Screws shall be minimum 1-1/2" from board edges and 3/4" from board ends. Gypsum wallboard shall be taped and filled. Screw heads shall be filled with gypsum joint compound. |
| 6. | Insulation: 2" rock wool insulation, nominal 3.5 pcf density, friction fit between flanges, resting on wood furring strips. |
| 7. | Wood Furring Strip (Not Shown): Nominal 1" x 4" wood furring strip installed under each bottom flange, centered on flange, fastened with 1-1/4" Type W screws located 24" oc. |
| 1. | Roof Covering System: Insulation and roof covering materials intended for built-up covering which provides Class A, B, C covering on combustible wood decks for fire resistant assemblies equivalent to this assembly. |
| 2. | Sheathing: Minimum 1/2" square edge plywood or orientestrandboardrd (OSB). Sheathing installed perpendicular to joists, with end joints staggered, fastened in accordance with Code requirements. |
| 3. | Structural Members: Nordic I-joist, minimum joist depth 9-1/4", minimum flange dimension 1-1/2" by 3-1/2", installed at 24" oc maximum. |
| 4. | Insulation: 1-1/2" rock wool insulation, nominal 2.5 pcf density, friction fit between flanges. |
| 5. | Resilient Channels: Nominal 24 gauge galvanized steel channels installed perpendicular to joists and spaced 16" oc maximum. Additional channels required at gypsum wallboard end joints such that each board end rests on its own channel. These additional channels shall extend to the next joist on each side of the board edges. Channels fastened with 1-5/8" long Type W screws at teach joist intersection. |
| 6. | Gypsum Board: One layer of 5/8" Type C gypsum wallboard installed perpendicular to channels with end joints staggered 48". Boards to be fastened to channels with minimum 1-1/8" Type S screws located 7" oc. Screws shall be minimum 1-1/2" from board edges and 3/4" from board ends. Gypsum wallboard shall be taped and filled. Screw heads shall be filled with gypsum joint compound. |