jswizzle3737/ontario_laws_and_regs huggingface dataset:
Notes to Table 3.3.1.5.B.:
3.3.4.8. Protection of Openable Windows (1) Except as provided by Sentence (2), openable windows in suites of residential occupancy
shall be protected by, (a) a guard
with a minimum height of 1 070 mm constructed in accordance with Article 3.3.1.17., or (b) a mechanism capable of controlling the free swinging or sliding of the openable part of the window so as to limit any clear unobstructed opening to a size that will prevent the passage of a sphere having a diameter more than 100 mm. (2) Windows need not be protected in accordance with Sentence (1) where, (a) the only opening having greater dimensions than those allowed by Clause (1)(b) is located higher than 1 070 mm above the finished floor, or (b) the bottom edge of the openable portion of the window is located less than 1 800 mm above the floor or ground on the other side of the window.
Notes to Table 3.3.1.5.B.:
3.3.4.9. Stud Wall Reinforcement (1) If wood wall studs or sheet steel wall studs enclose the main bathroom in a dwelling unit, reinforcement shall be installed to permit the future installation of the following: (a) for a water closet, a grab bar described in Clauses 3.8.3.8.(3)(a) and a grab bar described in Clause 3.8.3.8.(3)(c), (b) for a shower, grab bars described in Clause 3.8.3.13.(2)(g), and (c) for a bathtub, grab bars described in Clause 3.8.3.13.(4)(e).
Notes to Table 3.3.1.5.B.:
3.3.4.10. Resistance to Forced Entry (1) Resistance to forced entry into dwelling units shall conform to the applicable requirements in Articles 9.7.5.2. and 9.7.5.3.
Notes to Table 3.3.1.5.B.:
3.3.4.11. Retirement Homes (1) Floor areas containing residents’ sleeping rooms in a retirement home shall conform to Sentences (2) to (12). (2) Except as permitted by Sentence (3), a floor area containing residents’ sleeping rooms in a retirement home
where sleeping accommodation is provided for more than 10 residents shall be divided into no fewer than two fire compartments, each not more than 1 000 m2 in area. (3) The floor area on either side of a horizontal exit conforming to Article 3.4.6.10. is permitted to be considered as a fire compartment in applying the requirements of this Article. (4) Except as permitted by Sentence (5), fire separations
separating fire compartments required by Sentence (2) shall have a fire-resistance rating not less than 1 h. (5) The fire-resistance rating of a fire separation referred to in Sentence (4) is permitted to be less than 1 h but not less than 45 min provided the fire-resistance rating required by Subsection 3.2.2. is permitted to be less than 1 h for, (a) the floor assembly above the floor area, or (b) the floor assembly below the floor area, if there is no floor assembly above. (6) A closure in a fire separation
between fire compartments referred to in Sentence (2) shall be weatherstripped or otherwise designed and installed to retard the passage of smoke. (7) The travel distance from any point within each fire compartment
referred to in Sentence (2) to a door to an adjoining fire compartment shall be not more than 45 m. (8) Each fire compartment referred to in Sentence (2) shall be capable of accommodating, in addition to its own occupants, the occupants of the largest adjacent fire compartment based on a clear floor space of 1.5 m2 per resident in the adjacent fire compartment. (9) The fire separation required by Sentence 3.3.5.5.(1) between a retirement home and a repair garage shall have no openings. (10) In a retirement home, a dead end public corridor is permitted provided it is not more than 3 m long. (11) The minimum clear width of doorways serving residents in a retirement home shall be 860 mm. (12) A voice communication system conforming to Article 3.2.4.23. shall be provided in a retirement home. 3.3.5. Industrial Occupancy
Notes to Table 3.3.1.5.B.:
3.3.5.1. Scope (1) This Subsection applies to industrial occupancies.
Notes to Table 3.3.1.5.B.:
3.3.5.2. Fire Extinguishing Systems (1) In addition to other requirements in this Division for the installation of automatic fire extinguishing systems, an appropriate fire extinguishing system shall be installed in every industrial occupancy floor area to provide protection if required by, (a) the Fire Code made under the Fire Protection and Prevention Act, 1997, or (b) the CCBFC NRCC 56192, “National Fire Code of Canada”, in the absence of provisions referred to in Clause (a).
Notes to Table 3.3.1.5.B.:
3.3.5.3. Basements (1) A basement shall not be used for the storage, manufacture or handling of volatile solids, liquids or gases that generate explosive air-vapour mixtures or for processes that involve explosive dusts. (2) Entrances and exits to a basement and to rooms containing building
services shall be separate from the remainder of the building
in a building in which, (a) the storage, manufacture or handling of volatile materials can generate explosive air-vapour mixtures, or (b) processes occur that produce explosive dusts. (3) Basements and rooms referred to in Sentence (2) shall be separated from the remainder of the building with a vapour-tight separation.
Notes to Table 3.3.1.5.B.:
3.3.5.4. Repair and Storage Garages (1) If access is provided from a storage garage
to a stair tower or elevator serving occupancies
above the level of the storage garage, the access shall be through a vestibule conforming to Sentence 3.3.5.7.(3). (2) Treads and landings in interior stairs that extend to the roof of a storage garage shall be designed to be free of accumulations of ice and snow. (3) A mechanical storage garage not more than 4 storeys in building height, in which no persons other than parking attendants are permitted above the street floor level, need not have a fire separation between the exits
and the remainder of the building. (4) A storage garage or repair garage shall be provided with natural or mechanical ventilation in conformance with the requirements of Subsection 6.2.2. to prevent excessive accumulation of carbon monoxide, exhaust fumes or flammable and toxic vapours. (5) Except as required by Sentence 3.8.2.2.(2), the clear height in a storage garage shall be not less than 2 m. (6) Where storage garage or repair garage
floors or ramps are 600 mm or more above the adjacent ground or floor level, every opening through such floors and the perimeter of such floors and ramps shall be provided with, (a) a continuous curb not less than 140 mm high, a guard not less than 1 070 mm high and a vehicle guardrail not less than 500 mm high conforming to Sentence (6.1), or (b) a full-height wall conforming to Sentence (6.1). (6.1) Vehicle guardrails and full-height walls required by Sentence (6) shall be designed and constructed to withstand the loading values specified in Sentence 4.1.5.15.(1). (7) Except for open-air storeys, every storey of a storage garage or
repair garage located below grade
shall be sprinklered.
Notes to Table 3.3.1.5.B.:
3.3.5.5. Repair Garage Separation (1) A repair garage and any ancillary spaces serving it, including waiting rooms, reception rooms, tool and parts storage areas and supervisory office space, shall be separated from other occupancies by a fire separation
having a fire-resistance rating not less than 2 h.
Notes to Table 3.3.1.5.B.:
3.3.5.6. Storage Garage Separation (1) Except as permitted by Sentences 3.3.4.2.(4) and (5), a storage garage shall be separated from other occupancies by a fire separation
with a fire-resistance rating not less than 1.5 h.
Notes to Table 3.3.1.5.B.:
3.3.5.7. Vestibules (1) If access is provided through a fire separation
between a storage garage and a Group A, Division 1 or Group B occupancy or a retirement home, the access shall be through a vestibule conforming to Sentence (3). (2) In a building more than 3 storeys in building height, access through a fire separation between a storage garage and a Group A, Division 2, 3 or 4, or a Group C occupancy, shall be through a vestibule conforming to Sentence (3). (3) If access is provided through a vestibule, as required by Sentences (1), (2) and 3.3.5.4.(1), the vestibule shall, (a) be not less than 1.8 m long, (b) be ventilated, (i) naturally to outside air by a vent that has an unobstructed area of not less than 0.1 m2
for each door that opens into the vestibule but not less than 0.4 m², or (ii) mechanically at a rate of 14 m3/h for each square metre of vestibule floor surface area, and (c) have openings between the vestibule and an adjoining occupancy provided with self-closing doors with no hold-open devices.
Notes to Table 3.3.1.5.B.:
3.3.5.8. Toe-Boards Required (1) Where tools or other objects could fall from the floor of an upper level to a lower level in a room or space intended for use as a Group F occupancy, the edge of the floor at the upper level shall be provided with a toe-board extending from the floor surface to a height at least 125 mm above the floor surface.
Notes to Table 3.3.1.5.B.:
3.3.5.9. Guards (1) Guards in industrial occupancies, other than guards
in storage garages, are permitted to consist of, (a) a top rail, and (b) one or more intermediate rails spaced such that the openings through the guard are of a size that prevents the passage of a spherical object having a diameter of 535 mm. 3.3.6. Design of Hazardous Areas
Notes to Table 3.3.1.5.B.:
3.3.6.1. Application (1) This Subsection applies to design and fire protection requirements for buildings or parts of buildings
intended for the storage, handling, use and processing of, (a)  dangerous goods, (b) materials that involve a risk of explosion or high flammability, and (c) materials that are highly reactive.
Notes to Table 3.3.1.5.B.:
3.3.6.2. Storage of Dangerous Goods (1) A room intended for the storage of solid and liquid dangerous goods classified as oxidizers or organic peroxides shall be separated from the remainder of the building by a fire separation having a fire-resistance rating of not less than 2 h. (2) A room intended for the storage of reactive materials shall be separated from the remainder of the building by a fire separation having a fire-resistance rating
of not less than 2 h. (3) The design and
construction of a building
or part of a building intended for the storage of dangerous goods classified as explosives shall conform to the Explosives Act (Canada) and the regulations made under that Act.
Notes to Table 3.3.1.5.B.:
3.3.6.4. Storage and Dispensing Rooms for Flammable Liquids and Combustible Liquids (1) A room intended for the storage of flammable liquids
and combustible liquids shall be separated from the remainder of the building by a fire separation having a fire-resistance rating in conformance with the Fire Code made under the Fire Protection and Prevention Act, 1997. (2) Except as provided by Sentences (3) and (4), a room intended for the storage or dispensing of Class IA or Class IB liquids in open containers shall be designed to prevent critical structural and mechanical damage from an internal explosion in accordance with good engineering practice, such as that described in NFPA 68, “Explosion Protection by Deflagration Venting”. (3) Sentence (2) does not apply to a room intended for the storage of distilled beverage alcohol. (4) A room in an occupancy or facility covered by Regulation 851 of the Revised Regulations of Ontario, 1990 (Industrial Establishments), made under the Occupational Health and Safety Act, or Ontario Regulation 67/93 (Health Care and Residential Facilities), made under that Act, where Class IA liquids are intended to be stored in closed containers or Class I liquids are intended to be dispensed or stored in open containers, shall be designed to prevent critical structural and mechanical damage from an internal explosion in accordance with good engineering practice, such as that described in NFPA 68, “Explosion Protection by Deflagration Venting”. (5) A dispensing room in an occupancy or facility described in Sentence (4) which has an area greater than 15 m2 or in which the travel distance from any point to the nearest egress door is more than 4.5 m shall, (a) be located in a floor area that has at least two exits, and (b) have at least two egress doors. (6) An egress door serving a room described in Sentence (5) shall, (a) be equipped with a self-closing device, and (b) swing on a vertical axis in the direction of travel to the exit. (7) The minimum distance between the egress doors described in Clause (5)(b) shall be not less than three-quarters of the maximum diagonal dimension of the room. (8) The travel distance within the room to the nearest egress door described in Clause (5)(b) shall be not more than 23 m.
Notes to Table 3.3.1.5.B.:
3.3.6.5. Tire Storage (1) A tire storage area intended for the storage of more than 375 m3
of tires shall be separated from the remainder of the building
by a fire separation having a fire-resistance rating of not less than 2 h.
Notes to Table 3.3.1.5.B.:
3.3.6.6. Ammonium Nitrate Storage (1) Where the Fire Code made under the Fire Protection and Prevention Act, 1997 applies due to the quantity and nature of the stored product, a building intended for the storage of ammonium nitrate shall, (a) be not more than one storey in building height, (b) not contain a basement or a crawl space, (c) not contain open floor drains, tunnels, elevator pits or other pockets that might trap molten ammonium nitrate, (d) have noncombustible
flooring materials in storage areas, (e) be designed to prevent the ammonium nitrate from coming into contact with building materials that, (i) will cause the ammonium nitrate to become unstable, (ii) may corrode or deteriorate by reason of contact with the ammonium nitrate, or (iii) will become impregnated with the ammonium nitrate, and (f) have not less than 0.007 m2
of vent area for each square metre of storage area, unless mechanical ventilation is provided.
Notes to Table 3.3.1.5.B.:
3.3.6.7. Flooring Materials (1) The floor in an area intended for the storage of dangerous goods shall be constructed of impermeable materials to prevent the absorption of chemicals.
Notes to Table 3.3.1.5.B.:
3.3.6.8. Fire Separations in Process Plants (1) In a process plant, an area intended as a location where unstable liquids are handled or small scale unit chemical processes occur shall be separated from the remainder of the building by a fire separation having a fire-resistance rating
of not less than 2 h.
Notes to Table 3.3.1.5.B.:
3.3.6.9. Basements and Pits (1) A process plant intended as a location where Class I and Class II liquids are handled shall not contain a basement or a covered pit. Section 3.4. Exits 3.4.1. General
Notes to Table 3.3.1.5.B.:
3.4.1.1. Scope (1) Exit facilities complying with this Section shall be provided from every floor area that is intended for occupancy.
Notes to Table 3.3.1.5.B.:
3.4.1.2. Separation of Exits (1) Except as permitted by Sentence (2), if more than one exit is required from a floor area, each exit shall be separate from every other exit leading from that floor area. (2) If more than two exits are provided from a floor area, exits are permitted to converge in conformance with Sentence 3.4.3.1.(2), provided the cumulative capacity of the converging exits does not contribute more than 50% of the total required exit
width for the floor area.
Notes to Table 3.3.1.5.B.:
3.4.1.3. Access to Exits (1) Access to exits
shall conform to Section 3.3.
Notes to Table 3.3.1.5.B.:
3.4.1.4. Types of Exit (1) Subject to the requirements of this Section, an exit from any floor area
shall be one of the following, used singly or in combination: (a) an exterior doorway, (b) an exterior passageway, (c) an exterior ramp, (d) an exterior stairway, (e) a fire escape (conforming to Subsection 3.4.7.), (f) a horizontal exit, (g) an interior passageway, (h) an interior ramp, or (i) an interior stairway.
Notes to Table 3.3.1.5.B.:
3.4.1.5. Exterior Exit Passageways (1) Access to an exterior exit passageway from a floor area shall be through exit doors at the floor level. (2) Every exterior exit passageway that has a drop of more than 500 mm on any side shall have guards
on the open sides not less than 1 070 mm high.
Notes to Table 3.3.1.5.B.:
3.4.1.6. Restricted Use of Horizontal Exits (1) Except as permitted by Sentence (2), horizontal exits shall not comprise more than one-half of the required number of exits from any floor area. (2) In a hospital or long-term care home, horizontal exits serving patients’ or residents’ sleeping rooms shall comprise not more than two-thirds of the required number of exits
from any floor area. (3) Where an elementary or secondary school is subdivided by a firewall, a horizontal exit
shall not serve as an exit but is permitted to serve as an access to exit.
Notes to Table 3.3.1.5.B.:
3.4.1.7. Slide Escapes (1) A slide escape shall not be erected on any building
as a required exit, but is permitted to be provided as an additional egress facility if unusual hazards are foreseen.
Notes to Table 3.3.1.5.B.:
3.4.1.8. Transparent Doors and Panels (1) Glass and transparent panels in an exit
shall conform to the appropriate requirements of Article 3.3.1.18. for glass and transparent panels in an access to exit.
Notes to Table 3.3.1.5.B.:
3.4.1.9. Mirrors near Exits (1) No mirror shall be placed in or adjacent to any exit in a manner that would confuse the direction of exit.
Notes to Table 3.3.1.5.B.:
3.4.1.10. Combustible Glazing in Exits (1) Combustible
glazing is not permitted in wall or ceiling assemblies or in closures used to construct an
exit enclosure.
Notes to Table 3.3.1.5.B.:
3.4.1.11. Exterior Stairway for Long-Term Care Homes (1) No open exterior stairway shall serve as a means of egress for residents above the second floor of a long-term care home. 3.4.2. Number and Location of Exits from Floor Areas
Notes to Table 3.3.1.5.B.:
3.4.2.1. Minimum Number of Exits (1) Except as permitted by Sentences (2) to (4) and (6), every floor area intended for occupancy shall be served by at least two exits. (2) A floor area in a building
not more than 2 storeys in building height, is permitted to be served by one exit
provided the total occupant load served by the exit is not more than 60 and, (a) in a floor area that is not sprinklered, the floor area and the travel distance are not more than the values in Table 3.4.2.1.A., or (b) in a floor area that is sprinklered, (i) the travel distance is not more than 25 m, and (ii) the floor area is not more than the value in Table 3.4.2.1.B. Table 3.4.2.1.A.   Criteria for One Exit, Floor Area not Sprinklered Forming Part of Sentence 3.4.2.1.(2) Item   Column 1 Occupancy of Floor Area   Column 2 Maximum Floor Area, m2   Column 3 Maximum Travel Distance, m 

  1.   Group A   150   15 

  2.   Group C   100   15 

  3.   Group D   200   25 

  4.   Group E   150   15 

  5.   Group F, Division 2   150   10 

  6.   Group F, Division 3   200   15 Table 3.4.2.1.B.   Criteria for One Exit, Floor Area Sprinklered Forming Part of Sentence 3.4.2.1.(2) Item   Column 1 Occupancy of Floor Area   Column 2 Maximum Floor Area, m2 

  1.   Group A   200 

  2.   Group B   100 

  3.   Group C   150 

  4.   Group D   300 

  5.   Group E   200 

  6.   Group F, Division 2   200 

  7.   Group F, Division 3   300 (3) Except as permitted by Sentence (4), if Sentence (2) permits a single
exit from a floor area
classified as Group B or Group C occupancy, the exit shall be an exterior doorway not more than 1.5 m above adjacent ground level. (4) The requirements of Sentences (1) and (2) are permitted to be waived for dwelling units having access to exit conforming to Sentences 3.3.4.4.(1) to (4) and (8). (5) Exits are not required directly from rooftop enclosures that are provided with access to exits in conformance with Sentences 3.3.1.3.(5) and (6). (6) Every room containing an assembly occupancy
serving a hotel, and located in the building containing the hotel, shall be provided with no fewer than, (a) three separate egress doorways from the room where the occupant load is more than 600 persons, and (b) four separate egress doorways from the room where the occupant load is more than 1 000 persons. (7) Each egress doorway in Sentence (6) shall be considered as contributing not more than, (a) one-third of the required width where three egress doorways are required, and (b) one-fourth of the required width where four egress doorways are required.
Notes to Table 3.3.1.5.B.:
3.4.2.2. Mezzanine Exiting (1) Except as permitted by Sentences (2) to (4), a mezzanine
shall be provided with exits on the same basis as required for floor areas by this Section. (2) A mezzanine need not conform to Sentence (1) provided Article 3.2.8.2. does not require it to terminate at a vertical fire separation. (3) In a floor area that is not sprinklered, a mezzanine need not conform to Sentence (1) where Article 3.2.8.1. does require it to terminate at a vertical fire separation provided the total occupant load of the mezzanine
is not more than 60 and, (a) the area of the mezzanine does not exceed the area limits for rooms and suites in Table 3.3.1.5.A., and (b) the distance limits in Table 3.3.1.5.A. are not exceeded from any point on the mezzanine
to, (i) the egress doorway from the room in which the mezzanine is located if that room has a single egress doorway, or (ii) an egress facility leading from the mezzanine if the room in which the
mezzanine is located has two egress doorways provided in conformance with Subsection 3.3.1. (4) In a floor area that is sprinklered, a mezzanine need not conform to Sentence (1) where Article 3.2.8.1. does require it to terminate at a vertical fire separation provided the total occupant load of the mezzanine
is not more than 60 and, (a) the area of the mezzanine does not exceed the area limits for rooms and suites in Table 3.3.1.5.B., and (b) the distance of travel is not more than 25 m when measured from any point on the mezzanine
to, (i) the egress doorway from the room in which the mezzanine is located if that room has a single egress doorway, or (ii) an egress facility leading from the mezzanine if the room in which the
mezzanine is located has two egress doorways provided in conformance with Subsection 3.3.1.
Notes to Table 3.3.1.5.B.:
3.4.2.3. Distance between Exits (1) Except as provided in Sentence (2), the least distance between two required exits from a floor area shall be, (a) one-half the maximum diagonal dimension of the floor area, but need not be more than 9 m for a floor area having a public corridor, or (b) one-half the maximum diagonal dimension of the floor area, but not less than 9 m for all other floor areas. (2) Exits need not comply with Sentence (1) where, (a) the floor area is divided so that not less than one-third of the floor area is on each side of the fire separation, and (b) it is necessary to pass through the fire separation to travel from one exit to another exit. (3) The minimum distance between exits referred to in Sentence (1) shall be the shortest distance that smoke would have to travel between the exits, assuming that the smoke will not penetrate an intervening fire separation. (4) The distance between exterior doors leading from two or more exit
stairs serving the same floor area shall be, (a) not less than 9 m, or (b) not less than 6 m, where, (i) the building is sprinklered, and (ii) the exterior doors are located within 15 m of a street.
Notes to Table 3.3.1.5.B.:
3.4.2.4. Travel Distance (1) Except as permitted by Sentence (2), for the purposes of this Subsection, travel distance means the distance from any point in the floor area to an exit
measured along the path of travel to the exit. (2) The travel distance from a suite or a room not within a suite is permitted to be measured from an egress door of the suite or room to the nearest exit provided, (a) the suite
or room is separated from the remainder of the floor area
by a fire separation, (i) having a fire-resistance rating not less than 45 min in a floor area that is not sprinklered, or (ii) that is not required to have a fire-resistance rating, in a floor area that is sprinklered, and (b) the egress door opens onto, (i) an exterior passageway, (ii) a corridor used by the public that is separated from the remainder of the floor area in conformance with the requirements in Article 3.3.1.4. for the separation of public corridors, or (iii) a public corridor that is separated from the remainder of the floor area in conformance with Article 3.3.1.4. (3) Travel distance to an exit shall be not more than 50 m from any point in a service space
referred to in Sentence 3.2.1.1.(9). (4) If there is a firewall in an elementary or secondary school, the travel distance shall not be measured to a door in the
firewall, but shall be measured to an exterior exit door or an exit door to a stairway.
Notes to Table 3.3.1.5.B.:
3.4.2.5. Location of Exits (1) Except as permitted by Sentences (2), 3.2.8.4.(4) and 3.3.2.4.(13) to (16), if more than one exit is required from a floor area, the exits shall be located so that the travel distance to at least one exit
shall be not more than, (a) 25 m in a high hazard industrial occupancy, (b) 40 m in a business and personal services occupancy, (c) 45 m in a floor area that contains an occupancy other than a
high hazard industrial occupancy, provided it is sprinklered, (d) 105 m in any floor area, served by a public corridor, in which rooms and suites are not separated from the remainder of the floor area by a fire separation, provided, (i) the public corridor is not less than 9 m wide, (ii) the ceiling height in the public corridor is not less than 4 m above all floor surfaces, (iii) the building is sprinklered, and (iv) not more than one-half of the required egress doorways from a room or suite
open into the public corridor if the room or suite is required to have more than one egress doorway, (e) 60 m in any storage garage that conforms to the requirements of Article 3.2.2.83., and (f) 30 m in any floor area other than those referred to in Clauses (a) to (e). (2) Except for a high hazard industrial occupancy, Sentence (1) need not apply if exits are placed along the perimeter of the floor area and are not more than 60 m apart, measured along the perimeter, provided each main aisle in the floor area leads directly to an exit. (3) Exits shall be located and arranged so that they are clearly visible or their locations are clearly indicated and they are accessible at all times.
Notes to Table 3.3.1.5.B.:
3.4.2.6. Principal Entrance (1) For the purposes of this Section, at least one door at every principal entrance from ground level shall be designed in accordance with the requirements for exits. (2) In a building that is not sprinklered in accordance with Sentence 3.2.5.13.(1), the principal entrance serving a dance hall or a licensed beverage establishment with an occupant load more than 250 shall provide at least one-half of the required exit width. 3.4.3. Width and Height of Exits
Notes to Table 3.3.1.5.B.:
3.4.3.1. Exit Width Based on Occupant Load (1) For the purpose of determining the aggregate width of exits, the occupant load of every room or floor area shall be determined in conformance with Subsection 3.1.17. (2) Except as permitted by Sentence 3.4.3.2.(4), the required exit width shall be cumulative if two or more exits converge.
Notes to Table 3.3.1.5.B.:
3.4.3.2. Exit Width (1) Except as permitted by Sentence (3), the minimum aggregate required width of exits serving floor areas intended for assembly occupancies, residential occupancies, business and personal services occupancies, mercantile occupancies, and industrial occupancies
shall be determined by multiplying the occupant load
of the area served by, (a) 6.1 mm per person for ramps with a slope of not more than 1 in 8, doorways, corridors and passageways, (b) 8 mm per person for a stair consisting of steps whose rise is not more than 180 mm and whose run is not less than 280 mm, or (c) 9.2 mm per person for, (i) ramps with a slope of more than 1 in 8, or (ii) stairs, other than stairs conforming to Clause (b). (2) The minimum aggregate width of exits
serving floor areas intended for a care, care and treatment or detention occupancy shall be determined by multiplying the occupant load of the area served by 18.4 mm per person. (3) The minimum aggregate width of means of egress
serving a Group A, Division 4 occupancy shall be determined by multiplying the occupant load of the area served by, (a) 1.8 mm per person for, (i) aisles, (ii) stairs other than exit stairs, and (iii) ramps and passageways in vomitories and exits, and (b) 2.4 mm per person for exit stairs. (4) Except as required by Sentence (5), the required exit width need not be cumulative in an exit serving two or more floor areas located one above the other. (5) The required exit width for an exit stair in an assembly hall or theatre
serving more than one balcony level shall conform to the appropriate requirements for stairs serving interconnected floor spaces in Article 3.2.8.4. (6) If more than one exit is required, every
exit shall be considered as contributing not more than one-half of the required exit width. (7) The width of an exit shall be not less than, (a) 1 100 mm for corridors and passageways, (b) 1 100 mm for ramps not serving patients’ or residents’ sleeping rooms, (c) 1 100 mm for stairs, not serving patients’ or residents’ sleeping rooms, that serve more than two storeys above the lowest exit level
or more than one storey below the lowest exit level, (d) 900 mm for stairs, not serving patients’ or residents’ sleeping rooms, that serve not more than two storeys above the lowest exit level
or not more than one storey below the lowest exit level, (e) 1 650 mm for stairs and ramps serving patients’ or residents’ sleeping rooms, (f) 1 050 mm for doorways serving patients’ or residents’ sleeping rooms, and (g) 790 mm for doorways not serving patients’ or residents’ sleeping rooms.
Notes to Table 3.3.1.5.B.:
3.4.3.3. Exits from Interconnected Floor Space (1) Exit stairs that serve interconnected floor spaces as provided in Articles 3.2.8.3. to 3.2.8.11. shall conform to the requirements in Article 3.2.8.4. and in this Section.
Notes to Table 3.3.1.5.B.:
3.4.3.4. Exit Width Reduction (1) Except as permitted by Sentences (2) to (4), no fixture, turnstile or construction shall project into or be fixed within the required width of an exit. (2) Exit doors shall be hung so that, when open, they shall neither diminish nor obstruct the required width of the exit by more than 50 mm for each door leaf. (3) Swinging doors in their swing shall not reduce the required width of
exit stairs or landings to less than 750 mm or reduce the width of an exit passageway to less than the minimum required width. (4) Handrails and construction below handrails, including handrail supports and stair stringers, are permitted to project into the required width of means of egress but the projections shall be not more than 100 mm on each side of the required width. (5) In an elementary or secondary school, where a stair lift is installed in an exit stair, an intermediate handrail shall be installed between the path of travel of the stair lift and the remainder of the stair to ensure that the stair lift will not reduce the required width of the exit stair.
Notes to Table 3.3.1.5.B.:
3.4.3.5. Headroom Clearance (1) Except as provided by Sentences (2), (4) and (5), every exit shall have a clear height over the clear width of the exit of not less than 2 100 mm. (2) The clear height of stairways shall be measured vertically, over the clear width of the stairway, from a straight line tangent to the tread and landing nosings to the lowest point above, and shall not be less than 2 050 mm. (3) The clear height of landings shall be measured vertically, over the clear width of the landing, to the lowest point above. (4) Except as permitted by Sentence (5), the clear height of doorways shall not be less than 2 030 mm. (5) No door closer or other device shall be installed so as to reduce the clear height of a doorway to less than 1 980 mm. 3.4.4. Fire Separation of Exits
Notes to Table 3.3.1.5.B.:
3.4.4.1. Fire-Resistance Rating of Exit Separations (1) Except as provided by Sentences (2) and (5) and Sentences 3.3.5.4.(3), 3.4.4.2.(2), 3.4.4.3.(1) and 3.13.3.1.(3), every exit shall be separated from the remainder of the building by a fire separation
having a fire-resistance rating not less than that required by Subsection 3.2.2., but not less than 45 min, for, (a) the floor assembly above the storey, or (b) the floor assembly below the storey, if there is no floor assembly above. (2) The fire-resistance rating of the fire separation referred to in Sentence (1) need not be more than 2 h. (3) Revoked: O. Reg. 89/23, s. 11 (2). (4) If an exit stair in an assembly hall or theatre
serves more than one balcony level, the exit stair shall be separated from the remainder of the building
in conformance with Sentence (1). (5) The path of exit travel may lead from an exit
door or exit enclosure through open air parking that is located below a roof or floor assembly that is part of the building served by the exit door or exit enclosure where, (a) the portion of the path of exit travel that leads through the open air parking is not more than 9 m in length measured from the exit door to a point at ground level at the perimeter of the building, (b) measures are taken to prevent vehicles intended to park in spaces adjacent to the path of exit travel from encroaching on the path of exit travel, and (c) an alternate means of egress not leading through the open air parking is available from the interior side of the door opening onto the path of exit travel through the open air parking area.
Notes to Table 3.3.1.5.B.:
3.4.4.2. Exits through Lobbies (1) Except as permitted by Sentence (2), no exit
from a floor area above or below the first storey shall lead through a lobby. (2) Not more than one exit from a floor area is permitted to lead through a lobby provided, (a) the lobby floor is not more than 4.5 m above grade, (b) the path of travel through the lobby to the outdoors is not more than 15 m, (c) the adjacent rooms or premises having direct access to the lobby do not contain a residential occupancy or an industrial occupancy, except that dwelling units may open directly onto the lobby where, (i) from the interior of the exit stair that opens onto the lobby there is alternate means of egress not leading through the lobby and such means of egress is entirely within the same storey as the lobby, or (ii) the floor area is sprinklered, (d) except as required by Clause (g), the lobby is not located within an interconnected floor space other than as described in Sentence 3.2.8.2.(6), (e) the lobby conforms to the requirements for exits, except that, (i) rooms other than service rooms and storage rooms are permitted to open onto the lobby, (ii) the fire separation between the lobby and a room used for the sole purpose of control and supervision of the building
need not have a fire-resistance rating, (iii) the fire separation between the lobby and adjacent occupancies that are permitted to open onto the lobby need not have a fire-resistance rating provided the lobby and adjacent occupancies are sprinklered, and (iv) passenger elevator entrances are permitted to open onto the lobby provided the elevator entrance doors are designed to remain closed except while loading and unloading, (f) a fire separation, constructed in accordance with Sentence 3.4.4.1.(1), is maintained between the lobby and any exit permitted by this Sentence to lead through the lobby, and (g) that if the exit
serves a hotel, the lobby is not located within an interconnected floor space.
Notes to Table 3.3.1.5.B.:
3.4.4.3. Exterior Passageway Exceptions (1) The requirements of Sentences 3.4.4.1.(1) and 3.2.3.13.(1) and (3) do not apply to an exterior exit passageway provided, (a) not less than 50% of the exterior side is open to the outdoors, and (b) an exit
stair is provided at each end of the passageway.
Notes to Table 3.3.1.5.B.:
3.4.4.4. Integrity of Exits (1) A fire separation that separates an exit from the remainder of the building
shall have no openings except for, (a) standpipe and sprinkler piping, (b) electrical wires and cables, totally enclosed noncombustible raceways and noncombustible piping that serve only the exit, (c) openings required by the provisions of Subsection 3.2.6., (d)  exit
doorways, (e) wired glass and glass block permitted by Article 3.1.8.14., and (f) a sprinkler protected glazed wall assembly conforming to Article 3.1.8.18. (2) Exits within scissors stairs and other contiguous exit stairways shall be separated from each other by a smoke-tight fire separation having a fire-resistance rating
not less than that required for the floor assembly through which they pass. (3) Fire separations
separating contiguous stairs described in Sentence (2) shall not be pierced by doorways, ductwork, piping or any other openings that affect the continuity of the separation. (4) A fuel-fired appliance shall not be installed in an exit. (5) An exit shall not be used as a plenum for a heating, ventilating or air-conditioning system. (6) An exit shall be designed for no purpose other than for exiting, except that an exit is permitted also to be designed to serve as an access to a floor area. (7) A service room shall not open directly into an exit. (8) Storage rooms, washrooms, toilet rooms, laundry rooms and similar ancillary rooms shall not open directly into an exit. (9) Service spaces
referred to in Sentence 3.2.1.1.(9) shall not open directly into an exit. (10) In elementary and secondary schools, an exit
shall be designed so that it does not serve as an access from one portion of a floor area to another portion of the same floor area. 3.4.5. Exit Signs
Notes to Table 3.3.1.5.B.:
3.4.5.2. Signs within Exit Facilities (1) In a building more than 2 storeys in building height, any part of an exit ramp or stair that continues up or down past the lowest exit level shall be clearly marked by a sign indicating that it does not lead to an exit. (2) An exit stair serving a building more than 6 storeys
in building height shall be clearly marked by signs indicating that it does not lead to an exit at the roof level. 3.4.6. Types of Exit Facilities
Notes to Table 3.3.1.5.B.:
3.4.6.1. Surface Finish of Ramps and Stairs (1) The surfaces of ramps, landings and treads shall, (a) have a finish that is slip-resistant, and (b) if accessible to the public, have a colour contrast or a distinctive visual pattern to demarcate, (i) the leading edge of the tread, (ii) the leading edge of the landing, and (iii) the beginning and end of a ramp. (2) A tactile attention indicator conforming to Article 3.8.3.18. shall be installed, (a) at the top of the stairs, starting one tread depth back from the edge of the top stair, and (b) at the leading edge of landings where a doorway opens onto stairs, starting one tread depth back from the edge of the landing. (3) Treads and landings of exterior exit stairs shall be designed to be free of ice and snow accumulations if the stairs, (a) are more than 10 m high, or (b) serve a hotel.
Notes to Table 3.3.1.5.B.:
3.4.6.2. Minimum Number of Risers (1) Except as permitted by Sentence 3.3.2.13.(1), every flight of interior stairs shall have no fewer than 3 risers.
Notes to Table 3.3.1.5.B.:
3.4.6.3. Maximum Vertical Rise of Stair Flights and Required Landings (1) No flight shall have a vertical rise of more than 3.7 m between floors or landings, except that a flight
serving as an exit in a Group B, Division 2 or 3 occupancy shall have a vertical rise not more than 2.4 m between floors or landings. (2) Except as provided by Sentence (3), a landing shall be provided, (a) at the top and bottom of each flight of interior and exterior stairs, (b) at the top and bottom of every section of ramp, (c) where a doorway opens onto a stair or ramp, (d) where a ramp opens onto a stair, and (e) where a stair opens onto a ramp. (3) A landing may be omitted at the bottom of an exterior stair or ramp, provided there is no gate, door or fixed obstruction within the lesser of, (a) the width of the stair or ramp, or (b) 1 100 mm.
Notes to Table 3.3.1.5.B.:
3.4.6.4. Dimensions of Landings (1) Except as permitted in Sentences (2) and (6), a landing shall be, (a) at least as wide as the width of the stair or ramp in which it occurs, and (b) at least as long as the width of the stair or ramp in which it occurs. (2) Where a landing in a stair or ramp does not turn or turns less than 90o, the length of the landing need not be more than the lesser of, (a) the required width of the stair or ramp, or (b) 1 100 mm. (3) Where a landing in a stair or ramp turns less than 90o, the length of the landing shall be measured perpendicular to the nosings of adjacent steps or to the end of the ramp, at a distance equal to half the length required by Sentence (2) from the narrow edge of the landing. (4) Where a doorway or stair empties onto a ramp through a side wall, there shall be a level area extending across the full width of the ramp, and for a distance of 300 mm on either side of the wall opening, except one side if it abuts on an end wall. (5) Where a doorway or stair empties onto a ramp through an end wall, there shall be a level area extending across the full width of the ramp and along its length for not less than 900 mm. (6) Where the direction of exit
travel changes at a landing, the landing is permitted to be chamfered or curved in plan, provided the required width of the stair is maintained where measured perpendicular to the direction of exit travel across the landing.
Notes to Table 3.3.1.5.B.:
3.4.6.6. Guards (1) Every exit shall have a wall or a well-secured guard on each side where, (a) the difference in level is more than 600 mm between the walking surface and the adjacent surface, or (b) the adjacent surface within 1 200 mm of the walking surface has a slope of more than 1 in 2 away from the walking surface. (2) Except as required by Sentence (4), the height of guards for exit stairs and exit ramps, as well as their landings, shall be not less than 1 070 mm. (3) The height of guards shall be measured vertically to the top of the guard from, (a) a line drawn through the outside edges of the tread nosings, or (b) the surface of the ramp or landing. (4) The height of guards for exterior stairs and landings more than 10 m above adjacent ground level shall be not less than 1 500 mm measured vertically to the top of the guard
from the surface of the landing or a line drawn through the outside edges of the tread nosings. (5) Except as provided in Sentence (6), openings through any guard that is required by Sentence (1) shall be of a size that will prevent the passage of a sphere having a diameter more than 100 mm unless it can be shown that the location and size of openings that exceed this limit do not represent a hazard. (6) Openings through any guard that is required by Sentence (1) and that is installed in a building
of industrial occupancy shall be of a size that will prevent the passage of a sphere having a diameter more than 200 mm unless it can be shown that the location and size of openings that exceed this limit do not represent a hazard. (7) In a stairway, a window for which the distance measured vertically between the bottom of the window and a line drawn through the outside edges of the tread nosings is less than 900 mm, or a window that extends to less than 1 070 mm above the landing, shall, (a) be protected by a guard that is, (i) located approximately 900 mm above a line drawn through the outside edges of the tread nosings, or (ii) not less than 1 070 mm high measured to the top of the guard from the surface of the landing, or (b) be fixed in position and designed to resist the lateral design loads specified for guards
and walls in Articles 4.1.5.14. and 4.1.5.16. (8) Unless it can be shown that the location and size of openings do not present a hazard, a guard shall be designed so that no member, attachment or opening located between 140 mm and 900 mm above the level being protected by the guard will facilitate climbing.
Notes to Table 3.3.1.5.B.:
3.4.6.7. Ramp Slope (1) Except as required for aisles by Article 3.3.2.4., the maximum slope of a ramp shall be, (a) 1 in 10 in any assembly, care,
care and treatment, detention or residential occupancy, (b) 1 in 6 in an industrial occupancy, (c) 1 in 8 in all other occupancies, and (d) 1 in 10 for an exterior ramp.
Notes to Table 3.3.1.5.B.:
3.4.6.8. Treads and Risers (1) Except as permitted for dwelling units
and by Sentence 3.4.7.5.(1) for fire escapes, steps in flights
shall have a run of not less than 280 mm and not more than 355 mm between successive steps. (2) Steps referred to in Sentence (1) shall have a rise between successive treads not less than 125 mm and not more than 180 mm. (2.1) Steps in flights shall have no open risers, (a) except as provided in Article 3.3.4.7., and (b) except for the following stairs: (i) fire escape stairs, (ii) stairs that are principally used for maintenance and service, and (iii) stairs that serve industrial occupancies other than storage garages. (3) Except in fire escape stairs and where an exterior stair adjoins a walkway as permitted by Sentence 3.4.6.3.(3), risers, measured as the vertical nosing-to-nosing distance, shall be of uniform height in any one flight, with a maximum tolerance of, (a) 5 mm between adjacent treads or landings, and (b) 10 mm between the tallest and shortest risers in a flight. (4) Except in fire escape stairs, treads, measured as the horizontal nosing-to-nosing distance, shall have a uniform run
with a maximum tolerance of, (a) 5 mm between adjacent treads, and (b) 10 mm between the deepest and shallowest treads in a flight. (5) Treads and risers shall not differ significantly in run and rise in successive flights
in any stair system. (6) Reserved (7) The slope on treads or landings shall not exceed 1 in 50. (8) Except as permitted by Sentence (10), the top of the nosing of a stair tread shall have a rounded or bevelled edge extending not less than 6 mm and not more than 13 mm measured horizontally from the front of the nosing. (9) The front edge of stair treads in exits
and public access to exits shall be at right angles to the direction of exit travel. (10) If resilient material is used to cover the nosing of a stair tread, the minimum radius or bevel required by Sentence (8) is permitted to be reduced to 3 mm.
Notes to Table 3.3.1.5.B.:
3.4.6.9. Curved Flights in Exits (1) Flights used as an exit shall consist solely of, (a) straight flights, or (b) curved flights
complying with Sentence (2). (2) A curved flight used as an exit shall have, (a) a handrail on each side, (b) treads with a minimum run of 240 mm, (c) treads with a run that conforms to Article 3.4.6.8. when measured at a point 300 mm from the centre line of the inside handrail, and (d) an inside radius that is not less than twice the stair width. (3) Tapered treads shall have a consistent angle and uniform run and rise dimensions in accordance with the construction tolerances described in Article 3.4.6.8. when measured at a point 300 mm from the centre line of the inside handrail. (4) All tapered treads within a flight
shall turn in the same direction.