Warning This information has been archived because it is outdated and no longer relevant.

Archived Content

Information identified as archived on the Web is for reference, research or recordkeeping purposes. It has not been altered or updated after the date of archiving. Web pages that are archived on the Web are not subject to the Government of Canada Web Standards. As per the Communications Policy of the Government of Canada, you can request alternate formats on the "Contact Us" page.

3.2.2.21.(2)
ApplicationIntent
OS1OP1OS1OP1+
ObjectiveOS1 Fire Safety
Attribution
[F03-OS1.2] [F04-OS1.2,OS1.3] Applies to portion of Code text: “… (a) floor assemblies shall be fire separations … (i) with afire-resistance rating not less than 45 min …” and to Clause (b).
Application
Application 1: 
Fire separation requirements and fire-resistance rating of floor assemblies and of their supporting loadbearing walls, columns and arches in a storey in which more than 10% of the area is classified as a Group A, Division 1 major occupancy. This applies in buildings that:
  • are not more than 1 storey in building height,
  • have less than 40% of the area of the building as 2 storeys for the purpose of:
    • the development of productions, including the preparation of scenery and costumes and rehearsal of performers,
    • the organization of performers, scenery and sound equipment,
    • the preparation by performers for a performance,
    • managerial functions, or
    • toilets, rest rooms and similar public facilities,
  • have no occupancy above or below the auditorium other than one which serves it or is dependent on it,
  • are not more than 600 m2 in building area, and
  • have an occupant load of not more than 600.
This applies to buildings to which Part 3 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 3].
Application 2: 
This also applies to:
  • a floor assembly over a basement, subject to a minimum fire-resistance rating of 45 min, as stated in Article 3.2.1.4.,
  • a portion of a roof assembly that supports an occupancy, as stated in Sentence 3.2.2.13.(1), and
  • a mezzanine that is required to be considered as a storey in determining building height, as stated in Sentence 3.2.1.1.(6).
Exceptions: 
except:
  • a storey in which more than 10% of the area is classified as a Group A, Division 1 major occupancy but the building complies with the conditions of Article 3.2.2.22.,
  • a storey in which more than 10% of the area is classified as a Group A, Division 1 major occupancy but in addition has more than 10% of the area classified as a major occupancy that has more stringent requirements in accordance with Articles 3.2.2.20. or 3.2.2.22. to 3.2.2.83., and
  • a storey in which more than 10% of the area is classified as a Group A, Division 1 major occupancy but also has a portion of its floor area used for a Group F, Division 1 or 2 occupancy.
Top of Page
Intent
Intent 1: 
To limit the probability that loadbearing walls, columns and arches exposed to fire will prematurely fail or collapse, which could lead to the failure or collapse of supported floor assemblies during the time required to achieve occupant safety and for emergency responders to perform their duties, which could lead to harm to persons.
Intent 2: 
To limit the probability that floor assemblies exposed to fire will prematurely fail or collapse during the time required to achieve occupant safety and for emergency responders to perform their duties, which could lead to harm to persons.
Intent 3: 
To limit the probability that loadbearing walls, columns and arches exposed to fire will prematurely fail or collapse, which could lead to the failure or collapse of supported floor assemblies, which could lead to the spread of fire from a lower storey of a building to an upper storey or to the exterior during the time required to achieve occupant safety and for emergency responders to perform their duties, which could lead to harm to persons.
Intent 4: 
To limit the probability that floor assemblies exposed to fire will prematurely fail or collapse, which could lead to the spread of fire from a lower storey of a building to an upper storey or to the exterior of the building during the time required to achieve occupant safety and for emergency responders to perform their duties, which could lead to harm to persons.
Top of Page