(A) Wooden hatchways less than one and three-fourths inches thick solid wood shall be covered on the inside with 16-gauge sheet metal attached with screws at six-inch maximum centers around the perimeter.
(B) The hatchway shall be secured from the inside with a slide bar, slide bolt and/or padlock with a hardened steel shackle.
(C) Outside pin-type hinges shall be provided with nonremovable pins.
(D) Other openings exceeding 96 square inches with a least dimension exceeding eight inches shall be secured by metal bars, screens or grills in an approved manner.
(2000 Code, § 15.28.190)