To limit the probability that fire will spread through unprotected openings in the exterior walls of a fire compartment, dwelling unit, ancillary space or common space in a house containing a secondary suite to an outside area near the exterior exit door of another fire compartment, dwelling unit, ancillary space or common space in a house containing a secondary suite, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.
To expand the application of Articles 9.10.13.5. and 9.10.13.7. to include wired glass and glass blocks in unprotected openings in exterior walls under certain conditions.