Exits from a story above or below grade shall consist of interior stairways except as otherwise required in this section.
Smokeproof Towers. A smokeproof tower may be used in lieu of any required interior stairway. At least one smokeproof tower shall be provided in every building, having a height exceeding 264 feet.
Horizontal Exits. A horizontal exit may be used in lieu of an interior stairway when there is not less than one interior stairway or outside exit in each fire area connected by the horizontal exit, provided that no greater than 50 percent of the exits in any fire area shall be horizontal exits.
Escalators. An escalator may be used in lieu of one of three required interior stairways.
Exterior Stairways. Exterior stairways may be used in lieu of not more than 50 percent of the required interior stairways; provided, however, that the vertical distance from grade to the highest floor served by an exterior stairway shall not exceed 30 feet.
Ramps. Ramps complying with the requirements of Section 13-160-430 may be used in lieu of any required stairway.
Slide Pole. Slide poles as permitted by Section 13-160-050.
Elevators shall be provided in all new public buildings with emergency hold open buttons and the emergency communications no higher than four feet from the floor, except in buildings which provide ramps for the handicapped as noted in Section 13-160-470 of this Code.
Other means of exit such as collapsible escape ladders or other devices, may be permitted in unusual circumstances and shall comply with such requirements as the building commissioner shall prescribe.
(Prior code § 67-3.1; Amend Coun. J. 4-12-91, p. 32360; Amend Coun. J. 3-5-03, p. 104990, § 34; Amend Coun. J. 11-13-07, p. 14999, Art. II, § 1)