Div. B › Part 9 › 9.10 › 9.10.2 — Occupancy Classification

9.10.2.4 — Buildings Containing More Than One Major Occupancy

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(1) In a building containing more than 1 major occupancy, where the aggregate area of all major occupancies in a particular group or division does not exceed 10% of the floor area on the storey on which they are located, they need not be considered as major occupancies for the purposes of Articles 9.10.2.3. and 9.10.8.1. provided they are not classified as Group F, Division 2 occupancies.

OBC Definitions

Defined terms on this page

floor area

means the space on any storey of a building between exterior walls and required firewalls, including the space occupied by interior walls and partitions, but not including exits, vertical service spaces and their enclosing assemblies.

major occupancy

means the principal occupancy for which a building or part of a building is used or intended to be used, and is deemed to include the subsidiary occupancies that are an integral part of the principal occupancy. The major occupancy classifications used in this Code are as follows: (a)Group A, Division 1 - Assembly occupancies intended for the production and viewing of the performing arts, (b)Group A, Division 2 - Assembly occupancies not elsewhere classified in Group A, (c)Group A, Division 3 - Assembly occupancies of the arena type, (d)Group A, Division 4 - Assembly occupancies in which occupants are gathered in the open air, (e)Group B, Division 1 - Detention occupancies, (f)Group B, Division 2 - Care and treatment occupancies, (g)Group B, Division 3 - Care occupancies, (h)Group C - Residential occupancies, (i)Group D - Business and personal services occupancies, (j)Group E - Mercantile occupancies, (k)Group F, Division 1 - High hazard industrial occupancies, (l)Group F, Division 2 - Medium hazard industrial occupancies, and (m)Group F, Division 3 - Low hazard industrial occupancies.

occupancy

means the use or intended use of a building or part of a building for the shelter or support of persons, animals or property.

storey

means , except for the purposes of Part 7 of Division B, the portion of a building, (a)that is situated between the top of any floor and the top of the floor next above it, or (b)that is situated between the top of the floor and the ceiling above the floor, if there is no floor above it.

building

(a) a structure occupying an area greater than ten square metres consisting of a wall, roof and floor or any of them or a structural system serving the function thereof including all plumbing, works, fixtures and service systems appurtenant thereto,
(b) a structure occupying an area of ten square metres or less that contains plumbing, including the plumbing appurtenant thereto,
(c) plumbing not located in a structure,
(c.1) a sewage system, or
(d) structures designated in the building code; Act

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