Unprotected Openings (NBC Article 9.10.14.4.) and Glazed Openings (NBC Article 9.10.15.4.)

 Unprotected Openings (NBC Article 9.10.14.4.) and Glazed Openings (NBC Article 9.10.15.4.)

NBC Subsection 9.10.14. uses the term “unprotected opening.” It means any #opening other than one equipped with a #closure having the required fire-protection rating, or any part of a #wall forming part of the exposing building face that has a fire-resistance rating less than that required for the exposing building face. Unprotected openings include windows, #doors and openings for #electrical and #mechanical services.

NBC Subsection 9.10.15. uses the term “glazed opening.” Glazed openings include windows and glazed portions of doors. The area of glazed openings is measured to the rough opening of the window or door, not to the edges of the #glazing.

The area of unprotected or glazed openings allowed on a building face is based on the distance from an exposing building face to a property line, the centre line of a #street or public thoroughfare, or an imaginary line between two buildings or two fire compartments on the same #property (Figure 9.10.-26).

Quoted from Illustrated Users' Guide -- NBC2015

#unprotectedopening #glazedopening #fireprotection #exposingbuildingface #fireresistancerating #roughopening #propertyline #firecompartment