(A) General. The requirements of this section shall apply to all residential buildings in accordance with this section.
(B) Exterior doors - construction and securing. All exterior doors of the following material composition and providing access to any area of a building designed and constructed for human habitation shall be constructed and secured in the following manner.
(1) Construction.
(a) Wooden doors shall be of solid staved core construction at least one and three-eighths inch thick; provided, however, they may be less than one and three-eighths inch thick if they are covered on the inside with sheet steel of at least 16 gauge thickness secured with screws on six-inch centers around the perimeter.
(b) Metal doors shall be constructed so as to have strength at least equal to that of a solid staved core wooden door one and three-eighths inch thick.
(c) Glass doors shall be constructed of burglar-resistant materials. Doors with glass panels and doors where glass panels are located in the adjoining walls and within 40 inches of the door frame shall be constructed as follows:
1. They shall be constructed of burglar-resistant material, as defined in § 15.52.030; or
2. The glass therein shall be covered with iron bars at least one-half inch round or one inch by one-fourth inch flat steel material mortised, spaced not more than three inches apart, secured on the inside of the glazing; or
3. The glass therein shall be covered with iron or steel grills of at least one-eighth inch material of two-inch mesh secured on the inside of the glazing.
(2) Securing.
(a) Single swinging doors shall be secured with a dead latch with a minimum one-half inch projecting bolt and with a dead bolt lock with a minimum one-inch bolt. The bolt shall contain an insert and the cylinder shall be secured with a cylinder guard if the face of the cylinder projects beyond the face of the door.
(b) The active leaf of a pair of double swinging doors shall be secured as provided in subsection (a). The inactive leaf of a pair of double swinging doors shall be secured at the top and bottom with flush bolts with minimum five-eighths inch projection. The flush bolts shall be composed of a hardened material designed to repel cutting or sawing with common tools.
(c) There shall be a door scope installed in the front or main entrance door to each residential building that does not contain glass or transparent material allowing visibility of the area outside of such front or main entrance door from inside the building.
(d) All exterior windows shall be secured by a lock or locking device capable of withstanding those forces described in Test A for sliding glass windows as provided in § 15.52.060(A)(1) and shall be secured from lift-out while in the closed position.
(e) All exterior sliding glass doors providing access to any area designated for human habitation shall be secured with a lock or locking device capable of withstanding the forces applied in Test D as provided in § 15.52.060(A)(4).
(f) All in-swinging doors shall be secured at the strike side by a jamb of one piece or rabbet construction.
(g) All exposed hinges on exterior doors shall have nonremovable hinge pins and concealed or nonremovable screws.
(h) When the strike for any exterior door is secured in a wooden frame, it shall be secured by screws not less than two and one-half inches long.
(`78 Code, § 15.52.090.)