Section 3.2. Building Fire Safety
| 3.2.1. | General | |
| 3.2.2. | Building Size and Construction Relative to Occupancy | |
| 3.2.3. | Spatial Separation and Exposure Protection | |
| 3.2.4. | Fire Alarm and Detection Systems | |
| 3.2.5. | Provisions for Firefighting | |
| 3.2.6. | Additional Requirements for High Buildings | |
| 3.2.7. | Lighting and Emergency Power Systems | |
| 3.2.8. | Mezzanines and Openings Through Floor Assemblies | |
| 3.2.9. | Testing of Integrated Fire Protection and Life |
3.2.1. General
3.2.1.1. Exceptions in Determining Building Height
(1)A rooftop enclosure provided for elevator machinery, a stairway or a service room used for no purpose other than for service to the building, shall not be considered as a storey in calculating the building height.
(2)Space under tiers of seats in a building of the arena type shall not be considered as adding to the building height provided the space is used only for dressing rooms, concession stands and similar purposes incidental to the major occupancy of the building.
(3)Except as required by Sentence (5), the space above a mezzanine need not be considered as a storey in calculating building height provided
(a)the aggregate area of mezzanines that are not superimposed does not exceed 40% of the open area of the room in which they are located, and (See Note A-3.2.1.1.(3)(a))
(b)except as permitted in Sentences (7) and 3.3.2.13.(3) the space above the mezzanine is used as an open area without partitions or subdividing walls higher than 1 070 mm above the mezzanine floor.
(4)Except as required by Sentence (5), the space above a mezzanine need not be considered as a storey in calculating the building height provided
(a)the aggregate area of mezzanines that are not superimposed and do not meet the conditions of Sentence (3) does not exceed 10% of the floor area in which they are located, and
(b)the area of a mezzanine in a suite does not exceed 10% of the area of that suite.
(5)Except as permitted by Sentence (6), each level of mezzanine that is partly or wholly superimposed above the first level of mezzanine shall be considered as a storey in calculating the building height.
(6)Platforms intended solely for periodic inspection and elevated maintenance catwalks need not be considered as floor assemblies or mezzanines for the purpose of calculating building height, provided
(a)they are not used for storage, and
(b)they are constructed with noncombustible materials unless the building is permitted to be of combustible construction.
(7)The space above a mezzanine conforming to Sentence (3) is permitted to include an enclosed space whose area does not exceed 10% of the open area of the room in which the mezzanine is located, provided the enclosed space does not obstruct visual communication between the open space above the mezzanine and the room in which it is located. (See Note A-3.2.1.1.(3)(a))
(8)A service space in which facilities are included to permit a person to enter and to undertake maintenance and other operations pertaining to building services from within the service space need not be considered a storey if it conforms to Articles 3.2.5.14. and 3.3.1.25., and Sentences 3.2.4.18.(11), 3.2.7.3.(2), 3.3.1.3.(7), 3.4.2.4.(3) and 3.4.4.4.(9). (See Note A-3.2.1.1.(8))
3.2.1.2. Storage Garage Considered as a Separate Building
(1)A basement used primarily as a storage garage is permitted to be considered as a separate building for the purposes of Subsection 3.2.2. and Sentences 3.2.5.12.(2) and (3), provided the floor and roof assemblies above the basement and the exterior walls of the basement above the adjoining ground level are constructed as fire separations of noncombustible construction having a fire-resistance rating not less than 2 h and protected in conformance with Clause 3.1.10.2.(4)(a), except as permitted by Sentence (2). (See Notes A-3.1.10.2.(4) and A-3.2.5.12.(2))
(2)The exterior wall of a basement that is required to be a fire separation with a fire-resistance rating in accordance with Sentence (1) is permitted to be penetrated by openings that are not protected by closures provided
(a)the storage garage is sprinklered throughout,
(b)every opening in the exterior wall is separated from storeys above the opening by a projection of the floor or roof assembly above the basement, extending not less than
(i)1 m beyond the exterior face of the storage garage if the upper storeys are required to be of noncombustible construction, or
(ii)2 m beyond the exterior face of the storage garage if the upper storeys are permitted to be of combustible construction or encapsulated mass timber construction, or
(c)the exterior walls of any storeys located above the floor or roof assembly referred to in Sentence (1) are recessed behind the outer edge of the assembly by not less than
(i)1 m if the upper storeys are required to be of noncombustible construction, or
(ii)2 m if the upper storeys are permitted to be of combustible construction or encapsulated mass timber construction.
(3)The floor or roof assembly projection referred to in Clause (2)(b) shall have a fire-resistance rating not less than 2 h and shall have no openings within the projection.
3.2.1.3. Roof Considered as a Wall
(1)For the purposes of this Section any part of a roof that is pitched at an angle of 60° or more to the horizontal and is adjacent to a space intended for occupancy within a building shall be considered as part of an exterior wall of the building.
3.2.1.4. Floor Assembly Over Basement
(1)Except as permitted by Sentence 3.2.2.47.(3), 3.2.2.49.(3), 3.2.2.50.(3), 3.2.2.52.(3), 3.2.2.53.(3), 3.2.2.54.(3) or 3.2.2.55.(3), a floor assembly immediately above a basement shall be constructed as a fire separation having a fire-resistance rating conforming to the requirements of Articles 3.2.2.20. to 3.2.2.92. for a floor assembly, but not less than 45 min.
(2)All loadbearing walls, columns and arches supporting a floor assembly immediately above a basement shall have a fire-resistance rating not less than that required by Sentence (1) for the floor assembly.
3.2.1.5. Fire Containment in Basements
(1)Except as permitted by Sentences (2) and 3.2.2.15.(3), in a building in which an automatic sprinkler system is not required to be installed by Articles 3.2.2.18., every basement shall
(a)be sprinklered throughout, or
(b)be subdivided into fire compartments not more than 600 m² in area by a fire separation having a fire-resistance rating not less than that required for the floor assembly immediately above the basement.
(2)An open-air storey need not conform to Sentence (1).
3.2.1.6. Mezzanines
(1)The floor assembly of a mezzanine that is required to be considered as a storey in calculating the building height shall be constructed in conformance with the fire separation requirements for floor assemblies in Articles 3.2.2.20. to 3.2.2.92.
3.2.1. Building Size and Construction Relative to Occupancy
3.2.2.1. Application
(1)Except as permitted by Article 3.2.2.3., a building shall be constructed in conformance with this Subsection to prevent fire spread and collapse caused by the effects of fire. (See Subsection 3.1.3. for fire separations between major occupancies.)
3.2.2.2. Special and Unusual Structures
(1)A structure that cannot be identified with the characteristics of a building in Articles 3.2.2.20. to 3.2.2.92. shall be protected against fire spread and collapse in conformance with good fire protection engineering practice. (See Note A-3.2.2.2.(1)) (See also Notes A-3 and A-3.2.5.12.(1))
3.2.2.3. Exceptions to Structural Fire Protection
(1)Fire protection is not required for
(a)steel lintels above openings not more than 2 m wide in loadbearing walls and not more than 3 m wide in non-loadbearing walls,
(b)steel lintels above openings more than 2 m wide in loadbearing walls and more than 3 m wide in non-loadbearing walls provided the lintels are supported at intervals of not more than 2 m by structural members with the required fire-resistance rating,
(c)the bottom flanges of shelf angles and plates that are not a part of the structural frame,
(d)steel members for framework around elevator hoistway doorways, steel for the support of elevator and dumbwaiter guides, counterweights and other similar equipment, that are entirely enclosed in a hoistway and are not a part of the structural frame of the building,
(e)steel members of stairways and escalators that are not a part of the structural frame of a building,
(f)steel members of porches, exterior balconies, exterior stairways, fire escapes, cornices, marquees and other similar appurtenances, provided they are outside an exterior wall of a building, and
(g)loadbearing steel or concrete members wholly or partly outside a building face in a building not more than 4 storeys in building height and classified as Group A, B, C, D or F, Division 3 major occupancy provided the members are
(i)not less than 1 m away from any unprotected opening in an exterior wall, or
(ii)shielded from heat radiation in the event of a fire within the building by construction that will provide the same degree of protection that would be necessary if the member was located inside the building, with the protection extending on either side of the member a distance equal to the projection of the member from the face of the wall.
(See also Article 3.2.3.9.)
3.2.2.4. Buildings with Multiple Major Occupancies
(1)The requirements restricting fire spread and collapse for a building of a single major occupancy classification are provided in this Subsection according to its building height and building area.
(2)If a building contains more than one major occupancy, classified in more than one Group or Division, the requirements of this Subsection concerning building size and construction relative to major occupancy shall apply according to Articles 3.2.2.5. to 3.2.2.8.
(3)For the purposes of Sentences (1) and (2), a retirement home is deemed to be a separate major occupancy.
3.2.2.5. Applicable Building Height and Area
(1)In determining the fire safety requirements of a building in relation to each of the major occupancies contained therein, the building height and building area of the entire building shall be used.
(2)For the purposes of Sentence (1), a retirement home is deemed to be a separate major occupancy.
3.2.2.6. Multiple Major Occupancies
(1)Except as permitted by Articles 3.2.2.7. and 3.2.2.8., and Sentences 3.2.2.48.(4), 3.2.2.51.(5), 3.2.2.57.(3) and 3.2.2.60.(4), in a building containing more than one major occupancy, the requirements of this Subsection for the most restricted major occupancy contained shall apply to the whole building.
(2)For the purposes of Sentence (1), a retirement home is deemed to be a separate major occupancy.
3.2.2.7. Superimposed Major Occupancies
(1)Except as permitted in Article 3.2.2.8. and Sentences 3.2.2.18.(2), 3.2.2.48.(4), 3.2.2.51.(5), 3.2.2.57.(3) and 3.2.2.60.(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 were 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. (See also Article 3.1.3.1.)
(3)For the purposes of Sentences (1) and (2), a retirement home is deemed to be a separate major occupancy.
3.2.2.8. Exceptions for Major Occupancies
(1)In a building in which the aggregate area of all major occupancies in a particular Group or Division is not more than 10% of the floor area of the storey in which they are located, these major occupancies need not be considered as major occupancies for the purposes of this Subsection, provided they are not classified as Group F, Division 1 or 2 occupancies.
(2)For the purposes of Sentence (1), a retirement home is deemed to be a separate major occupancy.
(3)A helicopter landing area on the roof of a building need not be considered a major occupancy for purposes of Subsection 3.2.2. where such landing area is not more than 10% of the area of the roof.
3.2.2.9. Crawl Spaces
(1)For the purposes of Articles 3.1.11.6., 3.2.1.4. and 3.2.1.5., a crawl space shall be considered as a basement if it is
(a)more than 1.8 m high between the lowest part of the floor assembly and the ground or other surface below,
(b)used for any occupancy,
(c)used for the passage of flue pipes, or
(d)used as a plenum in combustible construction.
(2)A floor assembly immediately above a crawl space is not required to be constructed as a fire separation and is not required to have a fire-resistance rating provided the crawl space is not required to be considered as a basement by Sentence (1).
3.2.2.10. Streets
(1)Every building shall face a street located in conformance with the requirements of Articles 3.2.5.4 and 3.2.5.5 for access routes.
(2)For the purposes of Subsections 3.2.2. and 3.2.5. an access route conforming to Subsection 3.2.5. is permitted to be considered as a street.
(3)A building conforming to Article 3.2.2.51. or 3.2.2.60. is considered to face one street, where
(a)not less than 25% of the building perimeter is located within 15 m of a street or streets, or
(b)not less than 10% of the building perimeter is located within 15 m of a street or streets, provided the exterior cladding conforms to Sentence 3.1.4.8.(2).
(4)A building is considered to face 2 streets provided not less than 50% of the building perimeter is located within 15 m of the street or streets.
(5)A building is considered to face 3 streets provided not less than 75% of the building perimeter is located within 15 m of the street or streets.
(6)Enclosed spaces, tunnels, bridges and similar structures, even though used for vehicular or pedestrian traffic, are not considered as streets for the purpose of this Part.
3.2.2.11. Exterior Balconies
(1)Except as provided in Sentence (2), an exterior balcony shall be constructed in accordance with the type of construction required by Articles 3.2.2.20. to 3.2.2.92., as applicable to the occupancy classification of the building.
(2)The floor assembly of an exterior balcony in a building or part of a building conforming to Article 3.2.2.48. or 3.2.2.57. shall
(a)be of noncombustible construction, or
(b)be constructed in accordance with Article 3.1.6.3., but need not comply with Sentence 3.1.6.4.(1).
3.2.2.12. Exterior Passageways
(1)An elevated exterior passageway used as part of a means of egress shall conform to the requirements of Articles 3.2.2.20. to 3.2.2.92. for mezzanines.
3.2.2.13. Occupancy on Roof
(1)A portion of a roof that supports an occupancy shall be constructed in conformance with the fire separation requirements of Articles 3.2.2.20. to 3.2.2.92. for floor assemblies.
3.2.2.14. Rooftop Enclosures
(1)A rooftop enclosure for elevator machinery or for a service room shall be constructed in accordance with the type of construction required by Articles 3.2.2.20. to 3.2.2.92.
(2)A rooftop enclosure for elevator machinery or for a service room, not more than 1 storey high, is not required to have a fire-resistance rating.
(3)A rooftop enclosure for a stairway shall be constructed in accordance with the type of construction required by Articles 3.2.2.20. to 3.2.2.92.
(4)A rooftop enclosure for a stairway need not have a fire-resistance rating nor be constructed as a fire separation.
3.2.2.15. Storeys Below Ground
(1)If a building is erected entirely below the adjoining finished ground level and does not extend more than one storey below that ground level, the minimum precautions against fire spread and collapse shall be the same as are required for basements under a building of 1 storey in building height having the same occupancy and building area.
(2)If any portion of a building is erected entirely below the adjoining finished ground level and extends more than 1 storey below that ground level, the following minimum precautions against fire spread and collapse shall be taken:
(a)except as permitted by Sentence (3), the basements shall be sprinklered throughout,
(b)a floor assembly below the ground level shall be constructed as a fire separation with a fire-resistance rating not less than
(i)3 h if the basements are used as Group E or Group F, Division 1 or 2 occupancies, or
(ii)2 h if the basements are not used as Group E or Group F, Division 1 or 2 occupancies, and
(c)all loadbearing walls, columns and arches shall have a fire-resistance rating not less than that required for the construction that they support.
(3)If the first storey of a building is not required to be sprinklered, sprinklers are not required in the storey immediately below the first storey, provided the storey below
(a)contains only residential occupancies, and
(b)has at least one unobstructed access opening conforming to Sentence 3.2.5.1.(2) installed on that storey for each 15 m of wall length in at least one wall required by this Subsection to face a street.
3.2.2.16. Heavy Timber Roof Permitted
(1)Unless otherwise permitted by Articles 3.2.2.20. to 3.2.2.92., 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 throughout.
(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.
3.2.2.17. Roof Assemblies and Mezzanines in Gymnasiums, Swimming Pools, Arenas and Rinks
(1)The requirements for a roof assembly to have a fire-resistance rating stated in Articles 3.2.2.25., 3.2.2.30. and 3.2.2.32. are permitted to be waived for gymnasiums, swimming pools, arenas, and rinks, provided
(a)the roof carries no loads other than normal roof loads, including permanent access walks, and ventilating, sound and lighting equipment, and
(b)except as provided in Sentence (3), no part of the roof assembly is less than 6 m above the main floor or balcony. (See Note A-3.2.2.17.(1))
(2)The requirements for a mezzanine to have a fire-resistance rating stated in Articles 3.2.2.25., 3.2.2.30. and 3.2.2.32. are permitted to be waived for gymnasiums, swimming pools, arenas, and rinks, provided
(a)the mezzanine is not required to be considered as a storey as per Sentences 3.2.1.1.(3) to (5),
(b)the mezzanine is used only for ventilating, sound and lighting equipment, and
(c)except as provided in Sentence (3), no part of the mezzanine is less than 6 m above the main floor or balcony.
(3)The restrictions concerning minimum distance stated in Clauses (1)(b) and (2)(c) shall not apply to
(a)an inclined and stepped floor ascending from the main floor that is used for seating purposes only, or
(b)a balcony used for seating purposes only.
3.2.2.18. Automatic Sprinkler System Required
(1)Except as permitted by Sentence (2), an automatic sprinkler system conforming to the requirements of Articles 3.2.4.7., 3.2.4.8., 3.2.4.9. and 3.2.5.12. shall be installed throughout a building regulated by one or more of Articles 3.2.2.20., 3.2.2.21., 3.2.2.22., 3.2.2.23., 3.2.2.24., 3.2.2.26., 3.2.2.27., 3.2.2.29., 3.2.2.31., 3.2.2.33., 3.2.2.36., 3.2.2.37., 3.2.2.38., 3.2.2.39., 3.2.2.40., 3.2.2.41., 3.2.2.42., 3.2.2.43., 3.2.2.44., 3.2.2.45., 3.2.2.46., 3.2.2.47., 3.2.2.48., 3.2.2.49., 3.2.2.51., 3.2.2.52., 3.2.2.55., 3.2.2.55A., 3.2.2.55B., 3.2.2.55C., 3.2.2.55D., 3.2.2.55.E., 3.2.2.56., 3.2.2.57., 3.2.2.59., 3.2.2.60., 3.2.2.61., 3.2.2.63., 3.2.2.65., 3.2.2.66., 3.2.2.67., 3.2.2.69., 3.2.2.71., 3.2.2.72., 3.2.2.73., 3.2.2.74., 3.2.2.76., 3.2.2.77., 3.2.2.79., 3.2.2.81., 3.2.2.82., 3.2.2.84., 3.2.2.86., 3.2.2.88. and 3.2.2.90.
(2)If a storey in a building or a floor area is required to have an automatic sprinkler system installed throughout in accordance with one or more of Articles 3.2.2.20. to 3.2.2.92. or Section 3.3., the automatic sprinkler system shall also be installed throughout all lower storeys in the building notwithstanding permission in Articles 3.2.2.20. to 3.2.2.92. to construct one or more of those storeys without installing automatic sprinkler protection. (See Note A-3.2.2.18.(2))
3.2.2.19. Buildings Containing Impeded Egress Zones
(1)A building containing an impeded egress zone and conforming to the appropriate requirements of Articles 3.2.2.20. to 3.2.2.92. is not required to conform to the requirements of Articles 3.2.2.36. and 3.2.2.37. for a Group B, Division 1 major occupancy provided
(a)the building is sprinklered throughout,
(b)it is not more than 1 storey in building height,
(c)it does not include
(i)a contained use area,
(ii)sleeping accommodation,
(iii)a high-hazard industrial occupancy, or
(iv)a mercantile occupancy,
(d)the building area is not more than 6 400 m² if the building includes a medium-hazard industrial occupancy,
(e)the impeded egress zone does not extend beyond the boundaries of the fire compartment in which it is located, and
(f)the occupant load of the impeded egress zone is not more than 100.
3.2.2.20. Group A, Division 1, Any Height, Any Area, Sprinklered
(1)Except as permitted by Articles 3.2.2.21. and 3.2.2.22., a building classified as Group A, Division 1 shall conform to Sentence (2).
(2)Except as permitted by Article 3.2.2.16., the building referred to in Sentence (1) shall be of noncombustible construction, and
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building shall be sprinklered throughout,
(b)floor assemblies shall be fire separations with a fire-resistance rating not less than 2 h,
(c)mezzanines 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.
3.2.2.21. Group A, Division 1, One Storey, Limited Area, Sprinklered
(1)A building classified as Group A, Division 1 is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 1 storey in building height,
(c)it has less than 40% of the area of the building as 2 storeys for the purpose of
(i)development of productions including preparation of scenery and costumes and rehearsal of performers,
(ii)organization of performers, scenery and sound equipment,
(iii)preparation by performers for a performance,
(iv)managerial functions, or
(v)toilets, rest rooms and similar public facilities,
(d)it has no occupancy above or below the auditorium other than one which serves it or is dependent on it,
(e)it is not more than 600 m² in building area, and
(f)the occupant load is not more than 600.
(2)The building referred to in Sentence (1) is permitted to be of heavy timber construction or noncombustible construction used singly or in combination, and
(a)floor assemblies shall be fire separations
(i)with a fire-resistance rating not less than 45 min, or
(ii)of heavy timber construction, and
(b)loadbearing walls, columns and arches shall
(i)have a fire-resistance rating not less than that required for the supported assembly, or
(ii)be of heavy timber construction.
3.2.2.22. Group A, Division 1, One Storey, Sprinklered
(1)A building classified as Group A, Division 1 is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 1 storey in building height,
(c)no part of an auditorium floor is more than 5 m above or below grade,
(d)no occupancy is above or below the auditorium other than one which serves it or is dependent on it, and
(e)the occupant load of the auditorium floor is not more than 300.
(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 with 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)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, and
(d)loadbearing walls, columns and arches supporting a fire separation shall have a fire-resistance rating not less than that required for the fire separation.
3.2.2.23. Group A, Division 2, Any Height, Any Area, Sprinklered
(1)Except as permitted by Articles 3.2.2.24. to 3.2.2.28., a building classified as Group A, Division 2 shall conform to Sentence (2).
(2)Except as permitted by Article 3.2.2.16., the building referred to in Sentence (1) shall be of noncombustible construction, and
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building shall be sprinklered throughout,
(b)floor assemblies shall be fire separations with a fire-resistance rating not less than 2 h,
(c)mezzanines 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.
3.2.2.24. Group A, Division 2, up to 6 Storeys, Any Area, Sprinklered
(1)A building classified as Group A, Division 2, that is not limited by building area, is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout, and
(b)it is not more than 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)all loadbearing walls, columns and arches shall have a fire-resistance rating not less than that required for the supported assembly.
3.2.2.25. Group A, Division 2, up to 2 Storeys
(1)A building classified as Group A, Division 2 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 3.2.2.25.
Table 3.2.2.25.
Maximum Building Area, Group A, Division 2, up to 2 Storeys
Forming Part of Sentence 3.2.2.25.(1)
| No. of Storeys | Maximum Area, m2 | ||
|---|---|---|---|
| Facing 1 Street | Facing 2 Streets | Facing 3 Streets | |
| 1 | 1 600 | 2 000 | 2 400 |
| 2 | 800 | 1 000 | 1 200 |
(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)except as permitted by Article 3.2.2.17., mezzanines shall have, if of combustible construction, a fire-resistance rating not less than 45 min,
(c)except as permitted by Article 3.2.2.17., 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)800 m² if facing one street,
(ii)1 000 m² if facing 2 streets, or
(iii)1 200 m² if facing 3 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.
3.2.2.26. Group A, Division 2, up to 2 Storeys, Increased Area, Sprinklered
(1)A building classified as Group A, Division 2 is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 2 storeys in building height, and
(c)it has a building area not more than
(i)4 800 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)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.
3.2.2.27. Group A, Division 2, up to 2 Storeys, Sprinklered
(1)A building classified as Group A, Division 2 is permitted to be of combustible construction or noncombustible construction used singly or in combination, provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 2 storeys in building height, and
(c)it has a building area not more than
(i)2 400 m² if 1 storey in building height with no basement,
(ii)1 200 m² if 1 storey in building height, or
(iii)600 m² if 2 storeys in building height.
3.2.2.28. Group A, Division 2, One Storey
(1)A building classified as Group A, Division 2 is permitted to be of combustible construction or noncombustible construction used singly or in combination, provided
(a)it is not more than 1 storey in building height, and
(b)except as permitted by Sentence (2), it has a building area not more than
(i)400 m² if facing one street,
(ii)500 m² if facing 2 streets, or
(iii)600 m² if facing 3 streets.
(2)In a building referred to in Sentence (1) without a basement, the building area limits of Sentence (1) are permitted to be doubled provided a fire separation with a fire-resistance rating not less than 1 h is used to separate the building into fire compartments, each one of which does not exceed the area limits of Clause (1)(b).
3.2.2.29. Group A, Division 3, Any Height, Any Area, Sprinklered
(1)Except as permitted by Articles 3.2.2.30. to 3.2.2.34., a building classified as Group A, Division 3 shall conform to Sentence (2).
(2)Except as permitted by Article 3.2.2.16., the building referred to in Sentence (1) shall be of noncombustible construction, and
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building shall be sprinklered throughout,
(b)floor assemblies shall be fire separations with a fire-resistance rating not less than 2 h,
(c)mezzanines 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.
3.2.2.30. Group A, Division 3, up to 2 Storeys
(1)A building classified as Group A, 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 3.2.2.30.
Table 3.2.2.30
Maximum Building Area, Group A, Division 3, up to 2 Storeys
Forming Part of Sentence 3.2.2.30.(1)
| No. of Storeys | Maximum Area, m² | ||
|---|---|---|---|
| Facing 1 Street | Facing 2 Streets | Facing 3 Streets | |
| 1 | 4 000 | 5 000 | 6 000 |
| 2 | 2 000 | 2 500 | 3 000 |
(2) Except as permitted by Clauses (c) and (d), 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)except as permitted by Article 3.2.2.17., mezzanines shall have a fire-resistance rating not less than 1 h,
(c)except as permitted by Article 3.2.2.17., roof assemblies shall
(i)have a fire-resistance rating not less than 45 min, or
(ii)be of heavy timber construction, and
(d)loadbearing walls, columns and arches shall have a fire-resistance rating not less than that required for the supported assembly, except that arches and structural members within the storey immediately below a roof assembly are permitted to be of heavy timber construction.
(3) If intended for occasional use for trade shows and similar exhibition purposes, the building referred to in Sentence (1) that is more than 1 500 m² in building area shall be sprinklered throughout.
3.2.2.31. Group A, Division 3, up to 2 Storeys, Sprinklered
(1) A building classified as Group A, Division 3 is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building shall be sprinklered throughout,
(b)it is not more than 2 storeys in building height, and
(c)it has a building area not more than
(i)12 000 m² if 1 storey in building height, or
(ii)6 000 m² if 2 storeys in building height.
(2) Except as permitted by Clause (c) and 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, except that arches are permitted to be of heavy timber construction.
3.2.2.32. Group A, Division 3, One Storey, Increased Area
(1) A building classified as Group A, Division 3 is permitted to conform to Sentence (2) provided
(a)it is not more than 1 storey in building height, and
(b)it has a building area not more than
(i)2 400 m² if facing one street,
(ii)3 000 m² if facing 2 streets, or
(iii)3 600 m² if facing 3 streets.
(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)except as permitted by Article 3.2.2.17., mezzanines shall have, if of combustible construction, a fire-resistance rating not less than 45 min,
(b)except as permitted by Article 3.2.2.17., roof assemblies shall have, if of combustible construction, a fire-resistance rating not less than 45 min, except that 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)1 200 m² if facing one street,
(ii)1 500 m² if facing 2 streets, or
(iii)1 800 m² if facing 3 streets, 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.
(3) If intended for occasional use for trade shows and similar exhibition purposes, the building referred to in Sentence (1) that is more than 1 500 m² in building area shall be sprinklered throughout.
3.2.2.33. Group A, Division 3, One Storey, Sprinklered
(1) A building classified as Group A, Division 3 is permitted to be of combustible construction or noncombustible construction used singly or in combination, provided,
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 1 storey in building height, and
(c)it has a building area not more than 7 200 m².
3.2.2.34. Group A, Division 3, One Storey
(1) A building classified as Group A, Division 3 is permitted to be of combustible 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)1 000 m² if facing one street,
(ii)1 250 m² if facing 2 streets, or
(iii)1 500 m² if facing 3 streets.
3.2.2.35. Group A, Division 4
(1) Except as permitted by Sentences (2) and (3), a building classified as Group A, Division 4 shall be of noncombustible construction.
(2) Roof assemblies and supporting arches and columns are permitted to be of heavy timber construction.
(3) A building classified as Group A, Division 4 is permitted to be of combustible construction provided
(a)the occupant load is less than 1 500, and
(b)the building has a limiting distance not less than 6 m.
(4) Sprinklers shall be installed in all spaces below tiers of seats in a building classified as Group A, Division 4 if those spaces are used for occupancy. (See Note A-3.2.2.35.(4))
3.2.2.36. Group B, Division 1, Any Height, Any Area, Sprinklered
(1) Except as permitted by Article 3.2.2.37., a building classified as Group B, Division 1 shall conform to Sentence (2).
(2) Except as permitted by Article 3.2.2.16., the building referred to in Sentence (1) shall be of noncombustible construction, and
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building shall be sprinklered throughout,
(b)floor assemblies shall be fire separations with a fire-resistance rating not less than 2 h,
(c)mezzanines 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.
3.2.2.37. Group B, Division 1, up to 3 Storeys, Sprinklered
(1) A building classified as Group B, Division 1 is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 3 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 12 000 m² if 2 storeys in building height, or
(iii)not more than 8 000 m² if 3 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.
3.2.2.38. Group B, Division 2, Any Height, Any Area, Sprinklered
(1) Except as permitted by Articles 3.2.2.39. to 3.2.2.41., a building classified as Group B, Division 2 shall conform to Sentence (2).
(2) Except as permitted by Article 3.2.2.16., the building referred to in Sentence (1) shall be of noncombustible construction, and
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building shall be sprinklered throughout,
(b)floor assemblies shall be fire separations with a fire-resistance rating not less than 2 h,
(c)mezzanines 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.
3.2.2.39. Group B, Division 2, up to 3 Storeys, Sprinklered
(1) A building classified as Group B, Division 2 is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 3 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 12 000 m² if 2 storeys in building height, or
(iii)not more than 8 000 m² if 3 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.
3.2.2.40. Group B, Division 2, up to 2 Storeys, Sprinklered
(1)A building classified as Group B, Division 2 is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 2 storeys in building height, and
(c)it has a building area not more than
(i)2 400 m² if 1 storey in building height, or
(ii)1 600 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 with 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 shall have a fire-resistance rating not less than that required for the supported assembly.
3.2.2.41. Group B, Division 2, One Storey, Sprinklered
(1)A building classified as Group B, Division 2 is permitted to be of combustible construction or noncombustible construction used singly or in combination, provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 1 storey in building height, and
(c)it has a building area not more than 500 m².
3.2.2.42. Group B, Division 3, Any Height, Any Area, Sprinklered
(1)Except as permitted by Articles 3.2.2.43. to 3.2.2.46., a building classified as Group B, Division 3 shall conform to Sentence (2).
(2)Except as permitted by Article 3.2.2.16., the building referred to in Sentence (1) shall be of noncombustible construction, and
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building shall be sprinklered throughout,
(b)floor assemblies shall be fire separations with a fire-resistance rating not less than 2 h,
(c)mezzanines 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.
3.2.2.43. Group B, Division 3, Up to 3 Storeys, (Noncombustible), Sprinklered
(1)A building classified as Group B, Division 3 is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 3 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 12 000 m² if 2 storeys in building height, or
(iii)not more than 8 000 m² if 3 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.
3.2.2.44. Group B, Division 3, Up to 3 Storeys, Sprinklered
(1)A building classified as Group B, Division 3 is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 3 storeys in building height, and
(c)it has a building area not more than
(i)5 400 m² if 1 storey in building height,
(ii)2 700 m² if 2 storeys in building height, or
(iii)1 800 m² if 3 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 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.
3.2.2.45. Group B, Division 3, Up to 2 Storeys, Sprinklered
(1)A building classified as Group B, Division 3 is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 2 storeys in building height, and
(c)it has a building area not more than
(i)2 400 m² if 1 storey in building height, or
(ii)1 600 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 with 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 shall have a fire-resistance rating not less than that required for the supported assembly.
3.2.2.46. Group B, Division 3, One Storey, Sprinklered
(1)A building classified as Group B, Division 3 is permitted to be of combustible construction or noncombustible construction, used singly or in combination, provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 1 storey in building height, and
(c)it has a building area not more than 600 m².
3.2.2.47. Group C, Any Height, Any Area, Sprinklered
(1)Except as permitted by Articles 3.2.2.48. to 3.2.2.55., a building classified as Group C other than a retirement home shall conform to Sentence (2).
(2)Except as permitted by Article 3.2.2.16., the building referred to in Sentence (1) shall be of noncombustible construction, and
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building shall be sprinklered throughout,
(b)except as permitted by Sentence (3), floor assemblies shall be fire separations with a fire-resistance rating not less than 2 h,
(c)mezzanines 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.
(3)In a building that contains dwelling units that have more than one storey, subject to the requirements of Sentence 3.3.4.2.(3), the floor assemblies, including floors over basements, which are entirely contained within these dwelling units, shall have a fire-resistance rating not less than 1 h but need not be constructed as fire separations.
3.2.2.48. Group C, up to 12 Storeys, Sprinklered
(1)A building classified as Group C, other than a retirement home, is permitted to conform to Sentence (2), provided
(a)it is sprinklered throughout,
(b)it is not more than 12 storeys in building height,
(c)it has a height of not more than 42 m measured between the floor of the first storey and the uppermost floor level that does not serve as a rooftop enclosure for elevator machinery, a stairway or a service room used only for service to the building, and
(d)it has a building area not more than 6 000 m².
(2)Except as provided in Article 3.2.2.16., the building referred to in Sentence (1) is permitted to be of encapsulated mass timber construction or noncombustible construction used singly or in combination, and,
(a)except as provided in Sentence (3), floor assemblies shall be fire separations with a fire-resistance rating not less than 2 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.
(3)In a building that contains dwelling units that have more than one storey, subject to the requirements of Sentence 3.3.4.2.(3), the floor assemblies, including floors over basements, that are entirely contained within these dwelling units shall have a fire-resistance rating not less than 1 h but need not be constructed as fire separations.
(4)Group A, Division 2 major occupancies, Group E major occupancies and storage garages located in a building or part of a building within the scope of this Article are permitted to be constructed in accordance with this Article, provided
(a)the Group A, Division 2 major occupancy is located below the fourth storey,
(b)the Group E major occupancy is located below the third storey, and
(c)the storage garage is located below the fifth storey. (See also Article 4.4.2.1.)
(See Note A-3.2.2.48.(4) and 3.2.2.57.(3))
3.2.2.49. Group C, up to 6 Storeys, Sprinklered, Noncombustible Construction
(1)A building classified as Group C, other than a retirement home, is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(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 2 storeys in building height,
(ii)not more than 12 000 m² if 3 storeys in building height,
(iii)not more than 9 000 m² if 4 storeys in building height,
(iv)not more than 7 200 m² if 5 storeys in building height, or
(v)not more than 6 000 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)except as permitted by Sentence (3), 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.
(3)In a building that contains dwelling units that have more than one storey, subject to the requirements of Sentence 3.3.4.2.(3), the floor assemblies, including floors over basements, which are entirely contained within these dwelling units, shall have a fire-resistance rating not less than 1 h but need not be constructed as fire separations.
3.2.2.50. Group C, up to 4 Storeys, Noncombustible Construction
(1)A building classified as Group C, other than a retirement home, is permitted to conform to Sentence (2) provided
(a)it is not more than
(i)3 storeys in building height, or
(ii)4 storeys in building height provided there is not more than one dwelling unit above another dwelling unit, and vertical fire separations of adjacent dwelling units conform to Sentence (4),
(b)it has a building area not more than the value in Table 3.2.2.50.
Table 3.2.2.50.
Maximum Building Area, Group C, up to 4 Storeys
Forming Part of Sentence 3.2.2.50.(1)
| No. of Storeys | Maximum Area, m² | ||
|---|---|---|---|
| Facing 1 Street | Facing 2 Streets | Facing 3 Streets | |
| 1 | not limited | not limited | not limited |
| 2 | 6 000 | not limited | not limited |
| 3 | 4 000 | 5 000 | 6 000 |
| 4 | 3 000 | 3 750 | 4 500 |
(2)The building referred to in Sentence (1) shall be of noncombustible construction, and
(a)except as permitted by Sentence (3), 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.
(3)In a building that contains dwelling units that have more than one storey, subject to the requirements of Sentence 3.3.4.2.(3), the floor assemblies, including floors over basements, which are entirely contained within these dwelling units, shall have a fire-resistance rating not less than 1 h but need not be constructed as fire separations.
(4)The dwelling units described in Subclause (1)(a)(ii) shall be separated by continuous vertical fire separations that extend through all storeys and service spaces of the separated portions.
3.2.2.51. Group C, up to 6 Storeys, Sprinklered, Combustible Construction
(1)A building classified as Group C, other than a retirement home, is permitted to conform to Sentence (2) provided
(a)it is sprinklered throughout,
(b)it is not more than 6 storeys in building height,
(c)it has a height of not more than 18 m, measured between the floor of the first storey and the uppermost floor level that does not serve a rooftop enclosure for elevator machinery, a stairway or a service room used only for service to the building, and
(d)it has a building area of not more than
(i)9 000 m² if 1 storey in building height,
(ii)4 500 m² if 2 storeys in building height,
(iii)3 000 m² if 3 storeys in building height,
(iv)2 250 m² if 4 storeys in building height,
(v)1 800 m² if 5 storeys in building height, or
(vi)1 500 m² if 6 storeys in building height.
(2)Buildings referred to in Sentence (1) are permitted to be of combustible construction or noncombustible construction used singly or in combination, and
(a)except as permitted by Sentence (3), floor assemblies shall be fire separations with a fire-resistance rating not less than 1 h,
(b)roof assemblies shall have a fire-resistance rating not less than 1 h,
(c)except as provided by Sentence (4), where the roof assembly has a height greater than 25 m measured from the floor of the first storey to the highest point of the roof assembly, the roof assembly shall be constructed of noncombustible construction, or fire-retardant-treated wood conforming to Article 3.1.4.5.,
(d)mezzanines shall have a fire-resistance rating not less than 1 h, and
(e)loadbearing walls, columns and arches shall have a fire-resistance rating not less than that required for the supported assembly.
(3)In a building that contains dwelling units that have more than one storey, subject to the requirements of Sentence 3.3.4.2.(3), the floor assemblies, including those over basements, which are entirely contained within these dwelling units, shall have a fire-resistance rating not less than 1 h but need not be constructed as fire separations.
(4)Where buildings conforming to Sentence (2) include non-contiguous roof assemblies at different elevations, the roof assemblies are permitted to be evaluated separately to determine which ones are required to be constructed in accordance with Clause (2)(c).
(5)Group A, Division 2 major occupancies, Group E major occupancies and storage garages located in a building or part thereof within the scope of this Article are permitted to be constructed in accordance with this Article, provided
(a)the Group A, Division 2 major occupancy and Group E major occupancy are located below the third storey, and
(b)the storage garage is located below the fourth storey. (See also Article 4.4.2.1.)
(See Note A-3.2.2.51.(5) and 3.2.2.60.(4))
3.2.2.52. Group C, up to 4 Storeys, Sprinklered
(1)A building classified as Group C, other than a retirement home, is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 4 storeys in building height, and
(c)it has a building area not more than
(i)7 200 m² if 1 storey in building height,
(ii)3 600 m² if 2 storeys in building height,
(iii)2 400 m² if 3 storeys in building height, or
(iv)1 800 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)except as permitted by Sentences (3) and (4), 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.
(3)In a building that contains dwelling units that have more than one storey, subject to the requirements of Sentence 3.3.4.2.(3), the floor assemblies, including floors over basements, that are entirely contained within these dwelling units, shall have a fire-resistance rating not less than 1 h but need not be constructed as fire separations.
(4)In a building in which there is no dwelling unit above another dwelling unit, the fire-resistance rating for floor assemblies entirely within the dwelling unit is waived.
3.2.2.53. Group C, up to 3 Storeys, Increased Area
(1)A building classified as Group C, other than a retirement home, is permitted to conform to Sentence (2) provided
(a)it is not more than 3 storeys in building height, and
(b)it has a building area not more than the value in Table 3.2.2.53.
Table 3.2.2.53.
Maximum Building Area, Group C up to 3 Storeys, Increased Area
Forming Part of Sentence 3.2.2.53.(1)
| No. of Storeys | Maximum Area, m² | ||
|---|---|---|---|
| Facing 1 Street | Facing 2 Streets | Facing 3 Streets | |
| 1 | 2 400 | 3 000 | 3 600 |
| 2 | 1 200 | 1 500 | 1 800 |
| 3 | 800 | 1 000 | 1 200 |
(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)except as permitted by Sentences (3) and (4), 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.
(3)In a building that contains dwelling units that have more than one storey, subject to the requirements of Sentence 3.3.4.2.(3), the floor assemblies, including floors over basements, that are entirely contained within these dwelling units, shall have a fire-resistance rating not less than 1 h but need not be constructed as fire separations.
(4)In a building in which there is no dwelling unit above another dwelling unit, the fire-resistance rating for floor assemblies entirely within the dwelling unit is waived.
3.2.2.54. Group C, up to 3 Storeys
(1)A building classified as Group C, other than a retirement home, is permitted to conform to Sentence (2) provided
(a)it is not more than 3 storeys in building height, and
(b)it has a building area not more than the value in Table 3.2.2.54.
Table 3.2.2.54.
Maximum Building Area, Group C, up to 3 Storeys
Forming Part of Sentence 3.2.2.54.(1)
| No. of Storeys | Maximum Area, m² | ||
|---|---|---|---|
| Facing 1 Street | Facing 2 Streets | Facing 3 Streets | |
| 1 | 1 800 | 2 250 | 2 700 |
| 2 | 900 | 1 125 | 1 350 |
| 3 | 600 | 750 | 900 |
(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)except as permitted by Sentences (3) and (4), floor assemblies shall be fire separations with 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 shall have a fire-resistance rating not less than that required for the supported assembly.
(3)In a building that contains dwelling units that have more than one storey, subject to the requirements of Sentence 3.3.4.2.(3), the floor assemblies, including floors over basements, that are entirely contained within these dwelling units, shall have a fire-resistance rating not less than 45 min but need not be constructed as fire separations.
(4)In a building in which there is no dwelling unit above another dwelling unit, the fire-resistance rating for floor assemblies entirely within the dwelling unit is waived.
3.2.2.55. Group C, up to 3 Storeys, Sprinklered
(1)A building classified as Group C, other than a retirement home, is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 3 storeys in building height, and
(c)it has a building area not more than
(i)5 400 m² if 1 storey in building height,
(ii)2 700 m² if 2 storeys in building height, or
(iii)1 800 m² if 3 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)except as permitted by Sentences (3) and (4), floor assemblies shall be fire separations with 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 shall have a fire-resistance rating not less than that required for the supported assembly.
(3)In a building that contains dwelling units that have more than one storey, subject to the requirements of Sentence 3.3.4.2.(3), the floor assemblies, including floors over basements, that are entirely contained within these dwelling units, shall have a fire-resistance rating not less than 45 min but need not be constructed as fire separations.
(4)In a building in which there is no dwelling unit above another dwelling unit, the fire-resistance rating for floor assemblies entirely within the dwelling unit is waived.
3.2.2.55A. Group C, Retirement Home, Any Height, Any Area, Sprinklered
(1)Except as permitted by Articles 3.2.2.55B. to 3.2.2.55E., a retirement home shall conform to Sentence (2).
(2)Except as permitted by Article 3.2.2.16., the building referred to in Sentence (1) shall be of noncombustible construction, and
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building shall be sprinklered throughout,
(b)floor assemblies shall be fire separations with a fire-resistance rating not less than 2 h,
(c)mezzanines 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.
3.2.2.55B. Group C, Retirement Home, up to 4 Storeys, Sprinklered, Increased Area
(1)A retirement home is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 4 storeys in building height, and
(c)it has a building area not more than
(i)12 000 m² if 1 storey in building height,
(ii)6 000 m² if 2 storeys in building height,
(iii)4 000 m² if 3 storeys in building height, or
(iv)3 000 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 with a fire-resistance rating not less than 2 h,
(b)mezzanines shall have, if of combustible construction, 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.
3.2.2.55C. Group C, Retirement Home, up to 4 Storeys, Sprinklered
(1)A retirement home is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 4 storeys in building height, and
(c)it has a building area not more than
(i)6 600 m² if 1 storey in building height,
(ii)3 300 m² if 2 storeys in building height,
(iii)2 200 m² if 3 storeys in building height, or
(iv)1 650 m² if 4 storeys in building height.
3.2.2.55D. Group C, Retirement Home, up to 3 Storeys, Sprinklered, Noncombustible Construction
(1)A retirement home is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 3 storeys in building height, and
(c)it has a building area that is
(i)not limited if the building is not more than 1 storey in building height,
(ii)not more than 12 000 m² if 2 storeys in building height, or
(iii)not more than 8 000 m² if 3 storeys in building height.
(2)Except as permitted by Article 3.2.2.16., the building referred to in Sentence (1) is required to 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.
3.2.2.55E. Group C, Retirement Home, up to 3 Storeys, Sprinklered, Combustible Construction
(1)A retirement home is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 3 storeys in building height, and
(c)it has a building area not more than
(i)4 800 m² if 1 storey in building height,
(ii)2 400 m² if 2 storeys in building height, or
(iii)1 600 m² if 3 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 with 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 shall have a fire-resistance rating not less than that required for the supported assembly.
3.2.2.56. Group D, Any Height, Any Area, Sprinklered
(1)Except as permitted by Articles 3.2.2.57. to 3.2.2.65., a building classified as Group D shall conform to Sentence (2).
(2)Except as permitted by Article 3.2.2.16., the building referred to in Sentence (1) shall be of noncombustible construction, and
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building shall be sprinklered throughout,
(b)floor assemblies shall be fire separations with a fire-resistance rating not less than 2 h,
(c)mezzanines 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.
3.2.2.57. Group D, up to 12 Storeys, Sprinklered
(1)A building classified as Group D is permitted to conform to Sentence (2), provided
(a)it is sprinklered throughout,
(b)it is not more than 12 storeys in building height,
(c)it has a height of not more than 42 m measured between the floor of the first storey and the uppermost floor level that does not serve as a rooftop enclosure for elevator machinery, a stairway or a service room used only for service to the building, and
(d)it has a building area not more than 7 200 m².
(2)Except as provided in Article 3.2.2.16., the building referred to in Sentence (1) is permitted to be of encapsulated mass timber construction or noncombustible construction used singly or in combination, and
(a)floor assemblies shall be fire separations with a fire-resistance rating not less than 2 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.
(3)Group A, Division 2 major occupancies, Group E major occupancies, Group F, Division 2 and 3 major occupancies and storage garages located in a building or part of a building within the scope of this Article are permitted to be constructed in accordance with this Article, provided
(a)the Group A, Division 2 major occupancy is located below the fourth storey,
(b)the Group E major occupancy and Group F, Division 2 or 3 major occupancy are located below the third storey, and
(c)the storage garage is located below the fifth storey. (See also Article 4.4.2.1.)
(See Note A-3.2.2.48.(4) and 3.2.2.57.(3))
3.2.2.58. Group D, up to 6 Storeys
(1)A building classified as Group D 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 3.2.2.58.
Table 3.2.2.58.
Maximum Building Area, Group D, up to 6 Storeys
Forming Part of Sentence 3.2.2.58.(1)
| No. of Storeys | Maximum Area, m² | ||
|---|---|---|---|
| Facing 1 Street | Facing 2 Streets | Facing 3 Streets | |
| 1 | not limited | not limited | not limited |
| 2 | 7 200 | not limited | not limited |
| 3 | 4 800 | 6 000 | 7 200 |
| 4 | 3 600 | 4 500 | 5 400 |
| 5 | 2 800 | 3 600 | 4 320 |
| 6 | 2 400 | 3 000 | 3 600 |
(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, except that in a building not more than 1 storey in building height this requirement is waived, and
(d)loadbearing walls, columns and arches shall have a fire-resistance rating not less than that required for the supported assembly.
3.2.2.59. Group D, up to 6 Storeys, Sprinklered, Noncombustible Construction
(1)A building classified as Group D is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(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 2 storeys in building height,
(ii)not more than 14 400 m² if 3 storeys in building height,
(iii)not more than 10 800 m² if 4 storeys in building height,
(iv)not more than 8 640 m² if 5 storeys in building height, or
(v)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.
3.2.2.60. Group D, up to 6 Storeys, Sprinklered
(1)A building classified as Group D is permitted to conform to Sentence (2) provided
(a)it is sprinklered throughout,
(b)it is not more than 6 storeys in building height,
(c)it has a height of not more than 18 m measured between the floor of the first storey and the uppermost floor level that does not serve a rooftop enclosure for elevator machinery, a stairway or a service room used only for service to the building, and
(d)it has a building area of not more than
(i)18 000 m² if 1 storey in building height,
(ii)9 000 m² if 2 storeys in building height,
(iii)6 000 m² if 3 storeys in building height,
(iv)4 500 m² if 4 storeys in building height,
(v)3 600 m² if 5 storeys in building height, or
(vi)3 000 m² if 6 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 with a fire-resistance rating not less than 1 h,
(b)roof assemblies shall have a fire-resistance rating not less than 1 h,
(c)except as provided by Sentence (3), where the roof assembly has a height greater than 25 m measured from the floor of the first storey to the highest point of the roof assembly, the roof assembly shall be constructed of noncombustible construction or fire-retardant-treated wood conforming to Article 3.1.4.5.,
(d)mezzanines shall have a fire-resistance rating not less than 1 h, and
(e)loadbearing walls, columns and arches shall have a fire-resistance rating not less than that required for the supported assembly.
(3)Where buildings conforming to Sentence (2) include non-contiguous roof assemblies at different elevations, the roof assemblies are permitted to be evaluated separately to determine which ones are required to be constructed in accordance with Clause (2)(c).
(4)Group A, Division 2 major occupancies, Group E major occupancies, Group F, Division 2 and 3 major occupancies and storage garages located in a building or part thereof within the scope of this Article are permitted to be constructed in accordance with this Article, provided
(a)the Group A, Division 2 major occupancy, Group E major occupancy and Group F, Division 2 or 3 major occupancy are located below the third storey, and
(b)storage garages are located below the fourth storey. (See also Article 4.4.2.1.)
(See Note A-3.2.2.51.(5) and 3.2.2.60.(4))
3.2.2.61. Group D, up to 4 Storeys, Sprinklered
(1)A building classified as Group D is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 4 storeys in building height, and
(c)it has a building area not more than 3 600 m².
(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 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.
3.2.2.62. Group D, up to 3 Storeys
(1)A building classified as Group D is permitted to conform to Sentence (2) provided
(a)it is not more than 3 storeys in building height, and
(b)it has a building area not more than the value in Table 3.2.2.62.
Table 3.2.2.62.
Maximum Building Area, Group D, up to 3 Storeys
Forming Part of Sentence 3.2.2.62.(1)
| No. of Storeys | Maximum Area, m² | ||
|---|---|---|---|
| Facing 1 Street | Facing 2 Streets | Facing 3 Streets | |
| 1 | 4 800 | 6 000 | 7 200 |
| 2 | 2 400 | 3 000 | 3 600 |
| 3 | 1 600 | 2 000 | 2 400 |
(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 2 streets, or
(iii)3 600 m² if facing 3 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.
3.2.2.63. Group D, up to 3 Storeys, Sprinklered
(1)A building classified as Group D is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 3 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, or
(iii)4 800 m² if 3 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.
3.2.2.64. Group D, up to 2 Storeys
(1)A building classified as Group D 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 3.2.2.64.
Table 3.2.2.64.
Maximum Building Area, Group D, up to 2 Storeys
Forming Part of Sentence 3.2.2.64.(1)
| No. of Storeys | Maximum Area, m² | ||
|---|---|---|---|
| Facing 1 Street | Facing 2 Streets | Facing 3 Streets | |
| 1 | 1 000 | 1 250 | 1 500 |
| 2 | 800 | 1 000 | 1 200 |
(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, and
(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.
3.2.2.65. Group D, up to 2 Storeys, Sprinklered
(1)A building classified as Group D is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 2 storeys in building height, and
(c)it has a building area not more than
(i)3 000 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, and
(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.
3.2.2.66. Group E, Any Height, Any Area, Sprinklered
(1)Except as permitted by Articles 3.2.2.67. to 3.2.2.71., a building classified as Group E shall conform to Sentence (2).
(2)Except as permitted by Article 3.2.2.16., the building referred to in Sentence (1) shall be of noncombustible construction, and
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building shall be sprinklered throughout,
(b)floor assemblies shall be fire separations with a fire-resistance rating not less than 2 h,
(c)mezzanines 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.
3.2.2.67. Group E, up to 4 Storeys, Sprinklered
(1)A building classified as Group E is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 4 storeys in building height, and
(c)it has a building area not more than 1 800 m².
(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 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.
3.2.2.68. Group E, up to 3 Storeys
(1)A building classified as Group E is permitted to conform to Sentence (2) provided
(a)it is not more than 3 storeys in building height, and
(b)it has a building area not more than the value in Table 3.2.2.68.
Table 3.2.2.68.
Maximum Building Area, Group E, up to 3 Storeys
Forming Part of Sentence 3.2.2.68.(1)
| No. of Storeys | Maximum Area, m² | ||
|---|---|---|---|
| Facing 1 Street | Facing 2 Streets | Facing 3 Streets | |
| 1 | 1 500 | 1 500 | 1 500 |
| 2 | 1 200 | 1 500 | 1 500 |
| 3 | 800 | 1 000 | 1 500 |
(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 with 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 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 of noncombustible construction or is constructed as a fire-retardant-treated wood roof system conforming to Article 3.1.14.1.,
(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, and
(e)loadbearing walls, columns and arches supporting a fire separation shall have a fire-resistance rating not less than that required for the fire separation.
(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 with 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 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 of noncombustible construction or is constructed as a fire-retardant-treated wood roof system conforming to Article 3.1.14.1.,
(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, and
(e)loadbearing walls, columns and arches supporting a fire separation shall have a fire-resistance rating not less than that required for the fire separation.
3.2.2.69. Group E, up to 3 Storeys, Sprinklered
(1)A building classified as Group E is permitted to conform to Sentence (2) provided:
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 3 storeys in building height, and
(c)it has a building area not more than:
(i)7 200 m² if 1 storey in building height,
(ii)3 600 m² if 2 storeys in building height, or
(iii)2 400 m² if 3 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 with 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)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,
(d)loadbearing walls, columns and arches supporting a fire separation shall have a fire-resistance rating not less than that required for the fire separation.
3.2.2.70. Group E, up to 2 Storeys
(1)A building classified as Group E 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 3.2.2.70.
Table 3.2.2.70.
Maximum Building Area, Group E, up to 2 Storeys
Forming Part of Sentence 3.2.2.70.(1)
| No. of Storeys | Maximum Area, m² | ||
|---|---|---|---|
| Facing 1 Street | Facing 2 Streets | Facing 3 Streets | |
| 1 | 1 000 | 1 250 | 1 500 |
| 2 | 600 | 750 | 900 |
(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 with a fire-resistance rating not less than 45 min, and
(b)loadbearing walls, columns and arches shall have a fire-resistance rating not less than that required for the supported assembly.
3.2.2.71. Group E, up to 2 Storeys, Sprinklered
(1)A building classified as Group E is permitted to conform to Sentence (2) provided:
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 2 storeys in building height, and
(c)it has a building area not more than:
(i)3 000 m² if 1 storey in building height, or
(ii)1 800 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 with a fire-resistance rating not less than 45 min, and
(b)loadbearing walls, columns and arches shall have a fire-resistance rating not less than that required for the supported assembly.
3.2.2.72. Group F, Division 1, up to 4 Storeys, Sprinklered
(1)Except as permitted by Articles 3.2.2.73. to 3.2.2.75., a building classified as Group F, Division 1 shall 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:
(i)9 000 m² if 1 storey in building height,
(ii)4 500 m² if 2 storeys in building height,
(iii)3 000 m² if 3 storeys in building height, or
(iv)2 250 m² if 4 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)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building shall be sprinklered throughout,
(b)floor assemblies shall be fire separations with a fire-resistance rating not less than 2 h,
(c)mezzanines 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.
3.2.2.73. Group F, Division 1, up to 3 Storeys, Sprinklered
(1)A building classified as Group F, Division 1 is permitted to conform to Sentence (2) provided:
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 3 storeys in building height, and
(c)it has a building area not more than:
(i)3 600 m² if 1 storey in building height,
(ii)1 800 m² if 2 storeys in building height, or
(iii)1 200 m² if 3 storeys in building height.
(2)The building referred to in Sentence (1) is permitted to be of heavy timber construction or noncombustible construction used singly or in combination, and:
(a)floor assemblies shall be fire separations with a fire-resistance rating not less than 45 min,
(b)loadbearing walls, columns and arches shall have a fire-resistance rating not less than that required for the supported assembly.
3.2.2.74. Group F, Division 1, up to 2 Storeys, Sprinklered
(1)A building classified as Group F, Division 1 is permitted to conform to Sentence (2) provided:
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 2 storeys in building height, and
(c)it has a building area not more than:
(i)2 400 m² if 1 storey in building height, or
(ii)1 200 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.
3.2.2.75. Group F, Division 1, One Storey
(1)A building classified as Group F, Division 1 is permitted to be of combustible 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 800 m².
3.2.2.76. Group F, Division 2, Any Height, Any Area, Sprinklered
(1)Except as permitted by Articles 3.2.2.77. to 3.2.2.81., a building classified as Group F, Division 2 shall conform to Sentence (2).
(2)Except as permitted by Article 3.2.2.16., the building referred to in Sentence (1) shall be of noncombustible construction, and:
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building shall be sprinklered throughout,
(b)floor assemblies shall be fire separations with a fire-resistance rating not less than 2 h,
(c)mezzanines 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.
3.2.2.77. Group F, Division 2, up to 4 Storeys, Increased Area, Sprinklered
(1)A building classified as Group F, Division 2 is permitted to conform to Sentence (2) provided:
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 4 storeys in building height, and
(c)it has a building area not more than:
(i)18 000 m² if 1 storey in building height,
(ii)9 000 m² if 2 storeys in building height,
(iii)6 000 m² if 3 storeys in building height, or
(iv)4 500 m² if 4 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.
3.2.2.78. Group F, Division 2, up to 3 Storeys
(1)A building classified as Group F, Division 2 is permitted to conform to Sentence (2) provided:
(a)it is not more than 3 storeys in building height, and
(b)it has a building area not more than the value in Table 3.2.2.78.
Table 3.2.2.78.
Maximum Building Area, Group F, Division 2, up to 3 Storeys
Forming Part of Sentence 3.2.2.78.(1)
| No. of Storeys | Maximum Area, m² | ||
|---|---|---|---|
| Facing 1 Street | Facing 2 Streets | Facing 3 Streets | |
| 1 | 1 500 | 1 500 | 1 500 |
| 2 | 1 500 | 1 500 | 1 500 |
| 3 | 1 070 | 1 340 | 1 500 |
(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 with 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.,
(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, and
(e)loadbearing walls, columns and arches supporting a fire separation shall have a fire-resistance rating not less than that required for the supported assembly.
3.2.2.79. Group F, Division 2, up to 4 Storeys, Sprinklered
(1)A building classified as Group F, Division 2 is permitted to conform to Sentence (2) provided:
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b)it is not more than 4 storeys in building height, and
(c)it has a building area not more than:
(i)9 600 m² if 1 storey in building height,
(ii)4 800 m² if 2 storeys in building height,
(iii)3 200 m² if 3 storeys in building height, or
(iv)2 400 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 with 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)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, and
(d)loadbearing walls, columns and arches supporting a fire separation shall have a fire-resistance rating not less than that required for the supported assembly.
3.2.2.80. Group F, Division 2, up to 2 Storeys
(1)A building classified as Group F, Division 2 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 3.2.2.80.
Table 3.2.2.80
Maximum Building Area, Group F, Division 2, up to 2 Storeys
Forming Part of Sentence 3.2.2.80.(1)
| No. of Storeys | Maximum Area, m² | ||
|---|---|---|---|
| Facing 1 Street | Facing 2 Streets | Facing 3 Streets | |
| 1 | 1,000 | 1,250 | 1,500 |
| 2 | 600 | 750 | 900 |
(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, and
(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.
3.2.2.81. Group F, Division 2, up to 2 Storeys, Sprinklered
(1)A building classified as Group F, Division 2 is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.28.(2), the building is sprinklered throughout,
(b)it is not more than 2 storeys in building height, and
(c)it has a building area not more than
(i)4 500 m² if 1 storey in building height, or
(ii)1 800 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, and
(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.
3.2.2.82. Group F, Division 3, Any Height, Any Area, Sprinklered
(1)Except as permitted by Articles 3.2.2.83. to 3.2.2.92., a building classified as Group F, Division 3 shall conform to Sentence (2).
(2)Except as permitted by Article 3.2.2.16., the building referred to in Sentence (1) shall be of noncombustible construction, and
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building shall be sprinklered throughout,
(b)floor assemblies shall be fire separations with a fire-resistance rating not less than 2 h, except that floor assemblies are permitted to be fire separations with a fire-resistance rating not less than 1 h in a storage garage with all storeys constructed as open-air storeys,
(c)mezzanines shall have a fire-resistance rating not less than 1 h,
(d)if the building is not sprinklered, roof assemblies shall have a fire-resistance rating not less than 1 h, and
(e)loadbearing walls, columns and arches shall have a fire-resistance rating not less than that required for the supported assembly.
3.2.2.83. Group F, Division 3, up to 6 Storeys
(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 3.2.2.83.
Table 3.2.2.83.
Maximum Building Area, Group F, Division 3, up to 6 Storeys
Forming Part of Sentence 3.2.2.83.(1)
| No. of Storeys | Maximum Area, m² | ||
|---|---|---|---|
| Facing 1 Street | Facing 2 Streets | Facing 3 Streets | |
| 1 | not limited | not limited | not limited |
| 2 | 7 200 | 9 000 | 10 800 |
| 3 | 4 800 | 6 000 | 7 200 |
| 4 | 3 600 | 4 500 | 5 400 |
| 5 | 2 880 | 3 600 | 4 320 |
| 6 | 2 400 | 3 000 | 3 600 |
(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.
3.2.2.84. Group F, Division 3, up to 6 Storeys, Sprinklered
(1)A building classified as Group F, Division 3 is permitted to conform to Sentence (2) provided
(a)except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(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.
3.2.2.85. Group F, Division 3, up to 4 Storeys
(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 3.2.2.85.
Table 3.2.2.85.
Maximum Building Area, Group F, Division 3, up to 4 Storeys
Forming Part of Sentence 3.2.2.85.(1)
| No. of Storeys | Maximum Area, m² | ||
|---|---|---|---|
| Facing 1 Street | Facing 2 Streets | Facing 3 Streets | |
| 1 | 4 800 | 6 000 | 7 200 |
| 2 | 2 400 | 3 000 | 3 600 |
| 3 | 1 600 | 2 000 | 2 400 |
| 4 | 1 200 | 1 500 | 1 800 |
(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 2 streets, or
(iii) 3 600 m² if facing 3 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.
3.2.2.86. Group F, Division 3, up to 4 Storeys, Sprinklered
(1) A building classified as Group F, Division 3 is permitted to conform to Sentence (2) provided
(a) except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(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.
3.2.2.87. Group F, Division 3, up to 2 Storeys
(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 3.2.2.87.
Table 3.2.2.87.
Maximum Building Area, Group F, Division 3, up to 2 Storeys
Forming Part of Sentence 3.2.2.87.(1)
| Building Height (Storeys) | Maximum Area, m² | ||
|---|---|---|---|
| Facing 1 Street | Facing 2 Streets | Facing 3 Streets | |
| 1 | 2,400 | 3,000 | 3,600 |
| 2 | 1,800 | 2,400 | 3,000 |
(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, and
(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.
3.2.2.88. Group F, Division 3, up to 2 Storeys, Sprinklered
(1) A building classified as Group F, Division 3 is permitted to conform to Sentence (2) provided
(a) except as permitted by Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(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, and
(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.
3.2.2.90. Group F, Division 3, One Storey, Sprinklered
(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 Sentences 3.2.2.7.(1) and 3.2.2.18.(2), the building is sprinklered throughout,
(b) it is not more than 1 storey in building height, and
(c) it has a building area not more than 16 800 m².
3.2.2.91. Group F, Division 3, One Storey, Any Area, Low Fire Load Occupancy
(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.
3.2.2.92. Group F, Division 3, Storage Garages up to 22 m High
(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.
3.2.3. Spatial Separation and Exposure Protection (Note A-3.2.3.)
3.2.3.1. Limiting Distance and Area of Unprotected Openings
(1)Except as permitted by Articles 3.2.3.10. to 3.2.3.12., the area of unprotected openings in an exposing building face for the applicable limiting distance shall be not more than the value determined in accordance with
(a)Table 3.2.3.1.-B or Table 3.2.3.1.-C for an exposing building face conforming to Article 3.2.3.2. of a building or fire compartment which is not sprinklered, or
(b)Table 3.2.3.1.-D or Table 3.2.3.1.-E for an exposing building face conforming to Article 3.2.3.2. of a sprinklered fire compartment that is part of a building which is sprinklered in conformance with Section 3.2.
(See Note A-3)
(See also Article 3.1.18.3.)
(2)The area of the unprotected openings in an exposing building face shall be the aggregate area of unprotected openings expressed as a percentage of the area of the exposing building face in Table 3.2.3.1.-B, 3.2.3.1.-C, 3.2.3.1.-D or 3.2.3.1.-E. (See Sentence 3.2.3.2.(1))
(3)For the purpose of determining the type of construction and cladding and the fire-resistance rating of an exterior wall,
(a)the exposing building face shall be taken as the projection of the exterior wall onto a vertical plane located so that no portion of the exterior wall of the building or of a fire compartment, if the fire compartment complies with the requirements of Article 3.2.3.2., is between the vertical plane and the line to which the limiting distance is measured, and
(b)the area of unprotected openings shall be determined from Table 3.2.3.1.-B, 3.2.3.1.-C, 3.2.3.1.-D or 3.2.3.1.-E.
(4)For the purpose of determining the actual percentage of unprotected openings permitted in an exterior wall, the location of the exposing building face is permitted to be taken at a vertical plane located so that there are no unprotected openings between the vertical plane and the line to which the limiting distance is measured. (See Note A-3.2.3.1.(4))
(5)Except for buildings that are sprinklered, where the limiting distance is 2 m or less, individual unprotected openings in an exposing building face shall be no greater than
(a)the area stated in Table 3.2.3.1.-A, or
(b)where the limiting distance is equal to or greater than 1.2 m, the area calculated by