Warning This information has been archived because it is outdated and no longer relevant.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

9.8.4.6.(1)
OS3
ObjectiveOS3 Safety in Use
Attribution
Application
Application 1: 
Dimensions of curved or beveled leading edges of treads on interior and exterior stairs, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Application 2: 
This also applies to stairs within dwelling units in buildings to which Part 3 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 3], as stated in Sentence 3.3.4.7.(1).
Top of Page
Intent
Intent 1: 
To limit the probability that the edges of steps will not provide sufficient light modeling, which could lead to their location being difficult for the user to see, which could lead to:
  • persons falling, or
  • persons falling in an emergency, which could lead to delays in the evacuation or movement of persons to a safe place.
This is to limit the probability of harm to persons.
Intent 2: 
To limit the probability of:
  • excessively wide, sloped or curved portions of treads,
  • an insufficient usable tread depth, or
  • excessive protrusions (e.g. nosing) from risers.
This is to limit the probability of:
  • persons slipping, tripping or falling, or
  • persons slipping, tripping or falling in an emergency, which could lead to delays in the evacuation or movement of persons to a safe place.
This is to limit the probability of harm to persons.
Top of Page