An opening within 40 inches of a required locking device on a door when in the closed and locked position, and openable from the inside without the use of a key, shall be of burglary-resistant material, or shall be covered with iron bars of at least one-half inch round or one inch by one-fourth inch flat steel material spaced not more than five inches apart, secured on the inside of the glazing, or iron or steel grills of at least one-eighth inch material or two-inch mesh secured on the inside of the glazing.
(2000 Code, § 15.28.160)