1. OS3


OS3 Safety in Use



Intent 1:

To limit the probability of insufficient clear height over landings serving a single dwelling unit or a house with a secondary suite including common spaces.

This is to limit the probability of users accidentally contacting the ceiling with their head, 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.

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