5.9.2.1.General

(1) This Subsection applies to windows, doors and skylights, including their components, that separate
  (a) interior space from exterior space, or
  (b) environmentally dissimilar interior spaces.

  (2) For the purpose of this Subsection, the term “skylight” refers to unit skylights, roof windows and tubular daylighting
  devices.

  (3) Where a wired glass assembly is installed in a required fire separation, it need not conform to the requirements of
  this Subsection. (See Note A-5.9.2.1.(3))

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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.