9.9.4.6. Openings Near Exit Doors

 9.9.4.6. Openings Near Exit Doors

This Article specifies where unprotected openings have to be protected when located near exit doors to reduce the risk of a fire breaking out through a window and exposing an exit door to heat, making it unsafe as an exit. 

Exterior exit doors can be exposed to fire from unprotected windows in other parts of the building, which may interfere with the evacuation of the occupants in the event of a fire. Unless the exposing windows are kept at a substantial distance away and at a reasonable angle of exposure, they should be protected with wired glass or glass block (Figure 9.9.-5).

Quoted from Illustrated Users' Guide - NBC2015

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