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OBC 2006 › Division B

11.4.3.3.

Version 1 — in force 1 January 2010

In force · amended
Verified · covered Verified against the 2010-01-01–2010-03-31 consolidation, whose range covers the query date. How to read this

Provenance

OBC 1997 · continues from 11.4.3.3. — Pro

Base · O. Reg. 350/06 · ext v0 →

O. Reg. 503/09, cl. 215 · ext ← current

In force 2010-01-01

OBC 2012 · continues as 11.4.3.3. — Pro

11.4.3.3. — Increase in Occupant Load

(1) Where the performance level of an existing building is reduced under Sentences 11.4.2.2.(1)v1, (2) or (3) the building shall be evaluated, and the early warning and evacuation systems shall be upgraded, in conformance with the applicable requirements of Table 11.4.3.3.

(2) Sentence (1) does not apply in a Group C occupancy where the new total occupant load is,

(a) 14 persons or fewer in a boarding, lodging or rooming house, except that where the occupant load is between 10 and 15 persons, an interconnected system of smoke alarms in corridors near stairways is required, or

(b) 16 persons or fewer in a building containing residential suites which are dwelling units, except that where the occupant load is between 10 and 17 persons, an interconnected system of smoke alarms in corridors near stairways is required.

(3) Where the performance level of an existing building is reduced under Sentence 11.4.2.2.(1)v1, additional construction shall be required in order that the building or part of the building subject to the increase in occupant load conforms to the requirements of Sentence 6.2.2.1.(2)v1, Subsection 3.7.4. and Article 9.31.1.1.

Table 11.4.3.3. For Evaluation and Upgrading of Early Warning/Evacuation Forming Part of Sentences 11.4.3.3.(1) and (2)

Col. 1

Column 2

Column 3

Notes

Early Warning and Evacuation,

Evaluation and Upgrading

Part 11

Compliance Alternative (1)

(2)

Early Warning and Evacuation to be checked against

    (a) access to exit widths based on occupant load in Subsection 3.3.1. or 9.9.3.;

    (b) exit widths based on occupant load in Subsection 3.4.3. or 9.9.3.;

    (c) exit signs in Subsection 3.4.5. or 9.9.10;

    (d) lighting of exits, lighting of access to exits and emergency lighting in Subsection in Subsection 3.2.7. or 9.9.11.;

    (e) fire alarm system in Subsection 3.2.4. or 9.10.18.;

    (f) smoke alarms in Subsection 9.10.19.;

    (g) travel distance and number of exits in other Parts; and

    (h) door release hardware requirements in Articles 3.3.1.12. and 3.4.6.15.,

and deficiencies shall be upgraded.

EARLY WARNING

    (a) Compliance alternatives as listed may be used.

EVACUATION

    (b) Compliance alternatives as listed to access to exit and exit widths, number of exits, door release hardware, and travel distance may be used.

(3)

Early Warning and Evacuation to be checked against

    (a) access to exit widths based on occupant load in Subsection 3.3.1. or 9.9.3.;

    (b) exit widths based on occupant load in Subsection 3.4.3. or 9.9.3.;

    (c) exit signs in Subsection 3.4.5. or 9.9.10;

    (d) lighting of exits, lighting of access to exits and emergency lighting in Subsection in Subsection 3.2.7. or 9.9.11.;

    (e) fire alarm system in Subsection 3.2.4. or 9.10.18.;

    (f) smoke alarms in Subsection 9.10.19.;

    (g) travel distance and number of exits in other Parts;

    (h) smoke control measures, and at least one elevator to permit transport of fire fighters to all floors in hotels whose floor level is more than 18 m high measured between grade and floor level of the top storey as per Subsection 3.2.6., and

    (i) door release hardware requirements in Articles 3.3.1.12. and 3.4.6.15.,

and deficiencies shall be upgraded.

EARLY WARNING

    (a) Compliance alternatives as listed may be used.

EVACUATION

    (b) Compliance alternatives as listed to access to exit and exit widths, number of exits, door release hardware, and travel distance may be used.

Notes to Table 11.4.3.3.:

(1)See Tables 11.5.1.1.A., 11.5.1.1.B., 11.5.1.1.C., 11.5.1.1.D/E. and 11.5.1.1.F. for compliance alternatives that may be used.

(2)Applies to change of major occupancy to one of equal or lesser hazard, and to increase in occupant load by 15% or less.

(3)Applies to change of major occupancy to one of greater hazard, and to increase in occupant load greater than 15%.