Fire Resistance Ratings: floor_ceiling
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 | assembly description | assembly type | construction material | fire rating hr (hr) | key materials | min thickness in (in) | notes |
|---|---|---|---|---|---|---|---|---|
| floor_ceiling | concrete_slab_lw_2hr | Lightweight Concrete Slab — 2 Hour | floor_assembly | cast_in_place_concrete_lightweight | 2 | lightweight_concrete_105_pcf | 3.5 | Sand-lightweight concrete slab; 105 pcf density; superior fire resistance per unit thickness |
| floor_ceiling | concrete_slab_nw_1hr | Normalweight Concrete Slab — 1 Hour | floor_assembly | cast_in_place_concrete | 1 | normalweight_concrete_siliceous_aggregate | 3.5 | Solid concrete slab; siliceous aggregate; minimum thickness for 1-hour rating per ACI 216.1 |
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