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(a) Occupants per Unit Exit Width. The capacity of exits, except in assembly units and in open air assembly units, shall be computed as follows:
(1) Stairs and other vertical exits except smokeproof towers: 40 persons per unit of exit width;
(2) Smokeproof towers: 60 persons per unit of exit width;
(3) Doorways, outside exits, horizontal exits and exit connections: 60 persons per unit of exit width.
(b) Assembly Units. In assembly units the capacity of exits shall comply with the requirements of Chapter 13-84.
(c) Open Air Assembly Units. In open air assembly units the capacity of exits shall comply with the requirements of Chapter 13-88.
(d) Automatic Sprinklers. In buildings equipped throughout with an approved system of automatic sprinklers, the capacity of exits as established in this section and Section 13-84-180(b) and (c) may be increased 50 percent.
(e) Vertical Exits. The total width of vertical exits at any point shall be based on the requirements of the floor having the largest occupancy content which is served by such vertical exits. The required width of vertical exits serving more than one floor shall not be cumulative except as required by the provisions of Chapter 13-84 for assembly units and Chapter 13-88 for open air assembly units. Under no circumstances shall stairways decrease in width in the line of travel.
(f) Grade Floor Exits. The width of outside exits at grade shall be determined by the required width of vertical exits discharging on the grade floor plus the exit width required for the grade floor occupancy content.
(g) Mezzanine Floors. The occupancy content of a floor shall include the occupancy content of all mezzanine floors discharging thereon.
(Prior code § 67-7.4; Amend Coun. J. 11-6-85, p. 21656)