OBC 2006 › Division B

10.3.2.2.

Version 1 — in force 2 April 2007

In force · amended

Verified · covered Verified against the 2007-04-02–2007-06-30 consolidation, whose range covers the query date. How to read this

In force · amended

Verified · covered Verified against the 2007-04-02–2007-06-30 consolidation, whose range covers the query date. How to read this

Provenance

OBC 1997 · continues from 10.3.2.2. — Pro

Base · O. Reg. 350/06 · ext v0 →

O. Reg. 137/07, cl. 68 · ext ← current

In force 2007-04-02

OBC 2012 · continues as 10.3.2.2. — Pro

10.3.2.2. — Reduction in Performance Level

(1) Except as provided in Sentence (2), the performance level of a building or part of a building is reduced where the existing structural floor and roof framing systems and their supporting members are not adequate to support the proposed dead loads and live loads of the new major occupancy that the building is to support.

(2) The inadequacy of the existing structural floor or roof framing system and its supporting members to support the proposed dead loads and live loads does not reduce the performance level of the building if the portion of the floor affected by the proposed loads is restricted to the loading it will support and signs stating the restrictions are posted.

(3) Except as provided in Section 10.4., the performance level of a building or part of a building is reduced where the early warning and evacuation systems requirements of the building do not meet the early warning and evacuation systems requirements set out in Table 10.3.2.2.A. for the new major occupancy that the building is to support.

(4) Except as provided in Sentence (5), the performance level of an existing building is reduced where a change in use will result in a change of the major occupancy of all or part of an existing building to another major occupancy of a greater hazard index.

(5) Except as provided in Sentence (6), if the hazard index of the new major occupancy is greater than the hazard index of the existing major occupancy, the performance level is not reduced where the hazard index of the new major occupancy is not greater than the construction index of the existing building.

(6) Small or medium sized existing buildings as determined in Tables 11.2.1.1.B v1 to 11.2.1.1.N.v1 facing multiple streets may be assigned a hazard index credit of 1, which may be subtracted from the hazard index of the new major occupancy provided,

(a) the building does not contain a Group B, Division 1, a Group C, or a Group F, Division 1 occupancy, and

(b) fire fighting access complying with Articles 3.2.5.1., 3.2.5.2., 3.2.5.3., 3.2.5.4. and 3.2.5.5. or Subsection 9.10.20..

(7) Except as provided in Sentence (8), the performance level of a building or part of a building is reduced in an existing building constructed of combustible construction where,

(a) the occupancy is changed to a residential occupancy in all or part of the building, and

(b) if the building was new, it would have been required to be constructed of noncombustible construction.

(8) A change in the occupancy of a building or part of a building to a residential occupancy does not reduce the performance level of the building or part of the building where,

(a) the building is sprinklered, and

(b) the building does not exceed 6 storeys in building height.

(9) The performance level of a building or part of a building is reduced where the new major occupancy in an existing building of multiple occupancy is not separated from adjoining major occupancies by fire separations having fire-resistance ratings conforming to Article 3.1.3.1., Subsection 9.10.9. or Table 10.3.2.2.B.

(10) The performance level of a building is reduced where the building after the change of major occupancy will not comply with Articles 3.1.3.2. or 9.10.9.12.

(11) The performance level of a building or part of a building is reduced where, after a change of major occupancy,

(a) the total daily design sanitary sewage flow of the new major occupancy, calculated in accordance with Article 8.2.1.3., exceeds the capacity of any component of a sewage system serving the building, or

(b) the type or amount of sanitary sewage that will, under the new major occupancy, be discharged to a sewage system serving the building is prohibited by Article 8.1.3.1.v1

Editor's note

In this version, O. Reg. 137/07 (cl. 68) strikes 'or an approved alternative measure is provided from all streets' from Clause (6)(b); that deletion is applied here. The deletion leaves Clause (6)(b) ending 'Subsection 9.10.20..' with a doubled period - the period of the reference '9.10.20.' immediately followed by the sentence-ending period. (We did omit the comma left in by the directive.) The e-Laws consolidation collapses these into a single period; that editorial change was not enacted by any amending regulation, and this map does not reproduce it. The Sentence (10) 'Articles'/'Article' difference and the Table 10.3.2.2.A. and 10.3.2.2.B. note presentation differences noted for the prior version also apply here, and the e-Laws consolidation additionally drops a space after a comma in the Table 10.3.2.2.A. body ('5., and' to '5.,and') at its April 2, 2007 re-render.

Text · e-Laws consolidated snapshot

Table 10.3.2.2.A. For Evaluation of Early Warning/Evacuation Forming Part of Sentence 10.3.2.2.(3)

Column 1	Column 2
Early Warning / Evacuation Evaluation	Compliance Alternative⁽¹⁾
Early Warning and Evacuation to be checked against	EARLY WARNING
(a) access to exit widths based on occupant load in Subsection 3.3.1. or 9.9.3.;	(a) Compliance alternatives as listed may be used.
(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 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.;	EVACUATION
(g) travel distance and number of exits in other Parts of this Division;
(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	(b) Compliance alternatives as listed to access to exit and exit widths, number of exits, door release hardware, and travel distance may be used.
(i) door release hardware requirements in Articles 3.3.1.12. and 3.4.6.15.,
and deficiencies shall be upgraded.

Notes to Table 10.3.2.2.A.:

(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.

Table 10.3.2.2.B. (1) Additional Upgrading for Multiple Major Occupancies Forming Part of Sentence 10.3.2.2.(9)


Column 1	Column 2	Column 3	Column 4
New Major Occupancy	Code Requirements	Compliance Alternative
All ⁽²⁾	Table 3.1.3.1. and Subsection 9.10.9. Where:	For Existing Building Reduce to	If Sprinklered Reduce to
	1 h rating required	45 min	30 min
	2 h rating required	1.5 h	1 h
	3 h rating required	2 h	1.5 h

Notes to Table 10.3.2.2.B.:

⁽¹⁾For buildings with multiple major occupancies only, where there is a change in major occupancy.

⁽²⁾See Sentence 10.3.2.2.(9).