Warning This information has been archived because it is outdated and no longer relevant.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

3.3.5.3.(3)
ApplicationIntent
OS1
ObjectiveOS1 Fire Safety
Attribution
[F44-OS1.1]
Application
Application 1: 
Vapour-tight separations of basements and rooms containing building services from the remainder of the building, in buildings where:
  • the storage, manufacture or handling of volatile materials can generate explosive air-vapour mixtures, or
  • processes occur that produce explosive dusts.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A.
Application 2: 
This also applies to:
  • tents and air-supported structures, as stated in Sentences 3.1.6.1.(1) and 9.10.1.2.(1), and
  • rooms and spaces intended for the storage, manufacture or use of hazardous or explosive material, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], as stated in Sentence 9.10.1.2.(4).
Exceptions: 
except as stated in:
Top of Page
Intent
Intent 1: 
To limit the probability that explosive air-vapour mixtures or dusts will migrate into basements or service rooms from areas of the building involved with the hazardous products, which could lead to the accumulation of the mixtures or dusts in sufficient quantity to form an ignitable mixture, which could lead to the ignition of the mixtures or dusts from a nearby ignition source, which could lead to harm to persons.
Top of Page