To limit the probability that the performance of mirrored glass doors, with respect to strength, will fall significantly below expectations, which could lead to the glass being unable to resist impact loads, which could lead to glass breakage, which could lead to harm to persons.
To limit the probability that the performance of mirrored glass doors, with respect to strength, will fall significantly below expectations, which could lead to the glass being unable to resist loads imposed by persons who mistake mirrored glass doors for an access to exit in an emergency, and who collide with such doors, which could lead to delays in the evacuation or movement of persons to a safe place, which could lead to harm to persons.