The Ontario Building Code | Minimum Number of Exits

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 buildingnot more than 2 storeys in building height, is permitted to be served by one exitprovided 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 areaclassified 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 occupancyserving 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.