BCAB #970 - Windows - Means of Egress, Articles 18.104.22.168., 22.214.171.124. and; 126.96.36.199.
January 26, 1988
Re: Windows - Means of Egress, Articles 188.8.131.52., 184.108.40.206. and; 220.127.116.11.
With reference to your letter of December 31, 1987, regarding the requirements for windows in relation to a means of egress. We understand that the questions relate to dwelling units, and for simplicity have dealt directly with the Code Sections indicated in your letter.
Article 18.104.22.168. - This is a general provision for all Part 9 buildings and states that windows shall not be considered as forming part of a required means of egress.
Subsection 9.9.9. - This deals specifically with the means of egress from a dwelling unit. Article 22.214.171.124. limits the extent of travel within the unit, to reach the exit.
Article 126.96.36.199. provides a variation for a detached dwelling unit, or side by side dwelling units. It permits a relaxation of Article 188.8.131.52. provided that the storey in contravention of Article 184.108.40.206. is served by an openable window of stated dimensions. The window sill is limited in height above the floor, and above adjacent ground level. In this case we take the height as applying to the sill of the actual opening portion of the window unit.
Basically this relaxation requires an available window suitable for use as an emergency exit. To avoid any misunderstanding regarding the size of the window opening, the Code uses the word "unobstructed" and we take this to mean that the window is capable of providing an effective passage of these dimensions when it is fully open, from inside the building to the outside.
Article 220.127.116.11. - This requires the provision of at least one window suitable for use as an emergency exit in all bedrooms, unless the bedroom has a door providing direct access to the exterior. The clarification of opening size included for Article 18.104.22.168. would also apply to Article 22.214.171.124.
Article 126.96.36.199. - This merely amplifies Article 188.8.131.52. to deal with a condition where a window opens into a window-well. It would only involve a window with a hinged sash, and is intended to ensure that the emergency exit provisions are not restricted.
We would point out that two completely different issues are involved. One is a required means of egress from a dwelling unit, provided by doors. The other is the use of windows as emergency exits.
J.C. Currie, Chair