Fire Resistance Ratings: ibc table 601
type IIB floor to type VA bearing wall ext
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 | construction type IBC | fire rating hr (hr) | key materials |
|---|---|---|---|---|---|---|---|
| ibc table 601 | type IIB floor | Type IIB Floor Construction | floor assembly | unprotected noncombustible | IIB | 0 | noncombustible unprotected |
| ibc table 601 | type IIB structural frame | Type IIB Primary Structural Frame | structural frame | unprotected noncombustible | IIB | 0 | noncombustible unprotected |
| ibc table 601 | type IIIA bearing wall ext | Type IIIA Exterior Bearing Wall | bearing wall exterior | masonry or concrete | IIIA | 2 | brick masonry or concrete |
| ibc table 601 | type IIIA floor | Type IIIA Floor Construction | floor assembly | wood or protected steel | IIIA | 1 | wood or protected members |
| ibc table 601 | type IIIA structural frame | Type IIIA Primary Structural Frame | structural frame | protected noncombustible with combustible interior | IIIA | 1 | protected noncombustible frame |
| ibc table 601 | type IIIB bearing wall ext | Type IIIB Exterior Bearing Wall | bearing wall exterior | masonry or concrete | IIIB | 2 | brick masonry or concrete |
| ibc table 601 | type IIIB floor | Type IIIB Floor Construction | floor assembly | combustible unprotected | IIIB | 0 | wood unprotected |
| ibc table 601 | type IIIB structural frame | Type IIIB Primary Structural Frame | structural frame | noncombustible exterior combustible interior | IIIB | 0 | noncombustible exterior unprotected |
| ibc table 601 | type IV HT structural frame | Type IV Heavy Timber Structural Frame | structural frame | heavy timber | IV HT | 0 | heavy timber min 8x8 columns |
| ibc table 601 | type VA bearing wall ext | Type VA Exterior Bearing Wall | bearing wall exterior | combustible protected | VA | 1 | protected wood frame |
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