3.2.2.73 — Group F, Division 3, Any Height, Any Area

(1) Unless otherwise permitted by Articles 3.2.2.20. to 3.2.2.83., a roof assembly in a building up to 2 storeys in building height is permitted to be of heavy timber construction regardless of building area or type of construction required, provided the building is sprinklered. (2) If Sentence (1) permits a roof assembly to be of heavy timber construction, structural members in the storey immediately below the roof assembly are permitted to be of heavy timber construction.

(1) Except as permitted by Article 3.2.2.8. and Sentences 3.2.2.42A. (4), 3.2.2.43A. (5), 3.2.2.49A. (3) and 3.2.2.50A. (4), in a building in which one major occupancy is located entirely above another major occupancy, the requirements in this Subsection for each portion of the building containing a major occupancy shall apply to that portion as if the entire building was of that major occupancy. (2) If one major occupancy is located above another major occupancy, the fire-resistance rating of the floor assembly between the major occupancies shall be determined on the basis of the requirements of this Subsection for the lower major occupancy. (3) For the purposes of Sentences (1) and (2), a retirement home is deemed to be a separate major occupancy.

(1) A building classified as Group F, Division 3 is permitted to conform to Sentence (2) provided, (a) it is not more than 6 storeys in building height, and (b) it has a building area not more than the value in Table 3.2.2.74. (2) The building referred to in Sentence (1) shall be of noncombustible construction, and, (a) floor assemblies shall be fire separations with a fire-resistance rating not less than 1 h, (b) mezzanines shall have a fire-resistance rating not less than 1 h, (c) roof assemblies shall have a fire-resistance rating not less than 1 h, and (d) loadbearing walls, columns and arches shall have a fire-resistance rating not less than that required for the supported assembly.

(1) A building classified as Group F, Division 3 is permitted to conform to Sentence (2) provided, (a) except as permitted by Sentence 3.2.2.7. (1), the building is sprinklered, (b) it is not more than 6 storeys in building height, and (c) it has a building area, (i) that is not limited if the building is not more than 1 storey in building height, (ii) not more than 21 600 m2 if 2 storeys in building height, (iii) not more than 14 400 m2 if 3 storeys in building height, (iv) not more than 10 800 m2 if 4 storeys in building height, (v) not more than 8 640 m2 if 5 storeys in building height, or (vi) not more than 7 200 m2 if 6 storeys in building height. (2) Except as permitted by Article 3.2.2.16., the building referred to in Sentence (1) shall be of noncombustible construction, and, (a) floor assemblies shall be fire separations with a fire-resistance rating not less than 1 h, (b) mezzanines shall have a fire-resistance rating not less than 1 h, and (c) loadbearing walls, columns and arches shall have a fire-resistance rating not less than that required for the supported assembly.

(1) A building classified as Group F, Division 3 is permitted to conform to Sentence (2) provided, (a) it is not more than 4 storeys in building height, and (b) it has a building area not more than the value in Table 3.2.2.76. (2) The building referred to in Sentence (1) is permitted to be of combustible construction or noncombustible construction used singly or in combination, and, (a) floor assemblies shall be fire separations and, if of combustible construction, shall have a fire-resistance rating not less than 45 min, (b) mezzanines shall have, if of combustible construction, a fire-resistance rating not less than 45 min, (c) roof assemblies shall have, if of combustible construction, a fire-resistance rating not less than 45 min, except that in a building not more than 1 storey in building height, the fire-resistance rating is permitted to be waived provided the roof assembly is constructed as a fire-retardant treated wood roof system conforming to Article 3.1.14.1., and the building area is not more than, (i) 2 400 m2 if facing one street, (ii) 3 000 m2 if facing two streets, or (iii) 3 600 m2 if facing three streets, and (d) loadbearing walls, columns and arches supporting an assembly required to have a fire-resistance rating shall, (i) have a fire-resistance rating not less than 45 min, or (ii) be of noncombustible construction.

(1) A building classified as Group F, Division 3 is permitted to conform to Sentence (2) provided, (a) except as permitted by Sentence 3.2.2.7. (1), the building is sprinklered, (b) it is not more than 4 storeys in building height, and (c) it has a building area not more than, (i) 14 400 m2 if 1 storey in building height, (ii) 7 200 m2 if 2 storeys in building height, (iii) 4 800 m2 if 3 storeys in building height, or (iv) 3 600 m2 if 4 storeys in building height. (2) The building referred to in Sentence (1) is permitted to be of combustible construction or noncombustible construction used singly or in combination, and, (a) floor assemblies shall be fire separations and, if of combustible construction, shall have a fire-resistance rating not less than 45 min, (b) mezzanines shall have, if of combustible construction, a fire-resistance rating not less than 45 min, and (c) loadbearing walls, columns and arches supporting an assembly required to have a fire-resistance rating shall, (i) have a fire-resistance rating not less than 45 min, or (ii) be of noncombustible construction.

(1) A building classified as Group F, Division 3 is permitted to conform to Sentence (2) provided, (a) it is not more than 2 storeys in building height, and (b) it has a building area not more than the value in Table 3.2.2.78. (2) The building referred to in Sentence (1) is permitted to be of combustible construction or noncombustible construction used singly or in combination, and, (a) floor assemblies shall be fire separations and, if of combustible construction, shall have a fire-resistance rating not less than 45 min, (b) loadbearing walls, columns and arches supporting an assembly required to have a fire-resistance rating shall, (i) have a fire-resistance rating not less than 45 min, or (ii) be of noncombustible construction.

(1) A building classified as Group F, Division 3 is permitted to conform to Sentence (2) provided, (a) except as permitted by Sentence 3.2.2.7. (1), the building is sprinklered, (b) it is not more than 2 storeys in building height, and (c) it has a building area not more than, (i) 7 200 m2 if 1 storey in building height, or (ii) 2 400 m2 if 2 storeys in building height. (2) The building referred to in Sentence (1) is permitted to be of combustible construction or noncombustible construction used singly or in combination, and, (a) floor assemblies shall be fire separations and, if of combustible construction, shall have a fire-resistance rating not less than 45 min, (b) loadbearing walls, columns and arches supporting an assembly required to have a fire-resistance rating shall, (i) have a fire-resistance rating not less than 45 min, or (ii) be of noncombustible construction.

(1) A building classified as Group F, Division 3 is permitted to be of heavy timber construction or noncombustible construction used singly or in combination provided, (a) it is not more than 1 storey in building height, and (b) it has a building area not more than, (i) 5 600 m2 if facing one street, (ii) 7 000 m2 if facing two streets, or (iii) 8 400 m2 if facing three streets.

(1) A building classified as Group F, Division 3 is permitted to be of heavy timber construction or noncombustible construction used singly or in combination provided, (a) except as permitted by Sentence 3.2.2.7. (1), the building is sprinklered, (b) it is not more than 1 storey in building height, and (c) it has a building area not more than 16 800 m2.

(1) A building classified as Group F, Division 3 is permitted to conform to Sentence (2) provided it is, (a) not more than 1 storey in building height, (b) used solely for low fire load occupancies such as, (i) power generating plants, or (ii) plants for the manufacture or storage of noncombustible materials, and (c) not limited in building area. (2) The building referred to in Sentence (1) shall be of noncombustible construction.

(1) A building used as a storage garage with all storeys constructed as open-air storeys and having no other occupancy above it is permitted to have its floor, wall, ceiling and roof assemblies constructed without a fire-resistance rating provided it is, (a) of noncombustible construction, (b) not more than 22 m high, measured between grade and the ceiling level of the top storey, (c) not more than 10 000 m2 in building area, and (d) designed so that every portion of each floor area is within 60 m of an exterior wall opening.