Fire Resistance Ratings: wall_gypsum_steel_stud
Fire resistance ratings for building assemblies per UL/ASTM E119 — IBC Table 601 construction-type requirements (Types IA through VB), CMU wall equivalent-thickness ratings by aggregate type, gypsum board on steel/wood stud assemblies, concrete slab and wall thicknesses, composite steel deck/concrete floors, spray-applied fireproofing (SFRM) for columns and beams by W/D ratio, concrete-encased column ratings, and fire door assembly ratings (20-minute through 3-hour). Sources: IBC 2021 Table 601, ACI 216.1-14, UL Fire Resistance Directory, GA-600-2021, NFPA 80-2022, ASTM E119.
| assembly category | record id | STC rating (dimensionless) | UL design number | assembly description | assembly type | construction material | fire rating hr (hr) | key materials | min thickness in (in) | notes | weight psf (lb/ft2) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| wall_gypsum_steel_stud | gwb_steel_1layer_1hr | 45 | U411 | Gypsum Board on Steel Studs — 1 Layer Each Side — 1 Hour | wall | gypsum_steel_stud | 1 | 5/8-in_type_X_gypsum_board, 3-5/8-in_25-gauge_steel_studs | 3.625 | 1 layer 5/8-in Type X GWB each side; 3-5/8-in steel studs 16-in o.c.; per UL Design U411 | 8 |
| wall_gypsum_steel_stud | gwb_steel_2layer_2hr | 54 | U419 | Gypsum Board on Steel Studs — 2 Layer Each Side — 2 Hour | wall | gypsum_steel_stud | 2 | 5/8-in_type_X_gypsum_board_2_layers_each_side, 3-5/8-in_steel_studs | 5.5 | 2 layers 5/8-in Type X GWB each side; 3-5/8-in steel studs 24-in o.c.; per UL Design U419 | 15 |
| wall_gypsum_steel_stud | gwb_steel_double_stud_2hr | 59 | U305 | Double Steel Stud Wall with 2 Layers GWB — 2 Hour | wall | gypsum_steel_stud_double | 2 | 5/8-in_type_X_gypsum_board_2_layers_each_face, double_3-5/8-in_steel_studs_with_gap | 9 | Double stud rows separated 1-in; 2 layers 5/8-in Type X each face; per UL U305 | 18 |
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