3.1.3.1.Separation of Major Occupancies

(1) Except as permitted by Sentences (2) and (3), major occupancies shall be separated from adjoining major occupancies by fire separations having fire-resistance ratings conforming to Table 3.1.3.1. (2) In a building not more than 3 storeys in building height, if not more than two dwelling units are contained together with a Group E major occupancy, the fire-resistance rating of the fire separation between the two major occupancies need not be more than 1 h. (3) In a building conforming to the requirements of Articles 3.2.8.2. to 3.2.8.8., the requirements of Sentence (1) for fire separations between major occupancies do not apply at the vertical plane around the perimeter of an opening through the horizontal fire separation. r1 Table 3.1.3.1. Major Occupancy Fire Separations(1) Forming Part of Sentence 3.1.3.1.(1) Minimum Fire-Resistance Rating of Fire Separation, h Major Occupancy Adjoining Major Occupancy A-1 A-2 A-3 A-4 B-1 B-2 B-3 C D E F-1 F-2 F-3 A-1 — 1 1 1 2 2 2 1 1 2 (2) 2 1 A-2 1 — 1 1 2 2 2 1(3) 1(4) 2 (2) 2 1 A-3 1 1 — 1 2 2 2 1 1 2 (2) 2 1 A-4 1 1 1 — 2 2 2 1 1 2 (2) 2 1 B-1 2 2 2 2 — 2 2 2 2 2 (2) 2 2 B-2 2 2 2 2 2 — 1 2 2 2 (2) 2 2 B-3 2 2 2 2 2 1 — 2 2 2 (2) 2 2 C 1 1(3) 1 1 2 2 2 — 1 2(5) (2) 2(6) 1 D 1 1(4) 1 1 2 2 2 1 — — 3 — — E 2 2 2 2 2 2 2 2(5) — — 3 — — F-1 (2) (2) (2) (2) (2) (2) (2) (2) 3 3 — 2 2 F-2 2 2 2 2 2 2 2 2(6) — — 2 — — F-3 1 1 1 1 2 2 2 1 — — 2 — — r1 Notes to Table 3.1.3.1.: (1) Section 3.3. contains requirements for the separation of occupancies and tenancies that are in addition to the requirements for the separation of major occupancies. (2) See Sentence 3.1.3.2.(1). (3) Where the building or part thereof is constructed in accordance with Article 3.2.2.51., a fire separation with a 2 h fire-resistance rating is required between the Group C and Group A, Division 2 major occupancies. (4) Where the building or part thereof is constructed in accordance with Article 3.2.2.60., a fire separation with a 2 h fire-resistance rating is required between the Group D and Group A, Division 2 major occupancies. (5) See Sentence 3.1.3.1.(2). (6) See Sentence 3.1.3.2.(2).