13-84-150 Planning requirements for Type III schools.

   Every Type III school shall comply with the following planning requirements:

   (a)   Ceiling Heights. Minimum ceiling height eight feet, in any room; beams or furred spaces constituting not more than 20 percent of the ceiling area may project not more than one foot below the minimum ceiling height.

   (b)   Basement Rooms. Classrooms in a Type III school shall not be more than two feet below the building grade adjacent to such rooms, except that such classrooms may have floors up to six feet below grade, provided each such room has a direct outside exit.

(Prior code § 54-7.1)

13-84-160 Special exit requirements.

   Every room or space in an assembly unit shall comply with the applicable requirements of Chapter 13-160 and with the special exit requirements of Sections 13-84-170 to 13-84-280, inclusive.

(Prior code § 54-8)

13-84-170 Minimum number of exits.

   The minimum number of exits from every room, space or seating level in assembly units shall be not less than the following:

 

Capacity	Minimum Number of Exits
50 or less	1
51 to 300	2
301 to 1,000	3
More than 1,000	4

 

(Prior code § 54-8)

13-84-180 Width of exits.

   (a)   Schools. The capacity of exits in schools shall be computed as follows:

      (1)   Stairs and other vertical exits: 100 persons per unit of exit width.

      (2)   Doorways, corridors and horizontal exit connections: 115 persons per unit of exit width.

   When lockers are installed in corridors of schools, the full required clear width of the corridor shall be provided between locker doors when open.

   (b)   Assembly Units Other than Schools. The capacity of exits in assembly units other than schools shall be computed as follows:

      (1)   Stairs and other vertical exits except in buildings of Type III construction: 60 persons per unit of exit width; in buildings of Type III construction, 40 persons per unit of exit width.

      (2)   Doorways, corridors and horizontal exit connections: 90 persons per unit of exit width.

   (c)   Open Plan Schools. The capacity of exits in open plan schools shall be computed as follows:

      (1)   Stairs and other vertical exits: 85 persons per unit of exit width;

      (2)   Doorways and other horizontal exits: 100 persons per unit of exit width.

   Doors located at the end of an aisle and serving only that aisle shall not be required to have a width greater than the width of the aisle as provided in Section 13-84-230.

(Prior code § 54-8.2; Amend Coun. J. 3-30-88, p. 11380)

13-84-190 Location of exits.

   (a)   Exits shall be located as remote from each other as is practicable. In rooms, spaces or seating levels having fixed seats and requiring more than two exits, the exits shall be so located as to serve both sides of the front half and both sides of the rear half of the seating level.

   (b)   All required stairs in Type I schools shall open directly to the outside air or to a public vestibule or lobby leading to the outside. The travel distance from the stairway to the outside exit door of such vestibule or lobby shall not exceed 20 feet.

(Prior code § 54-8.3)

13-84-200 Exit connections.

   (a)   In theaters, the foyer at the main floor level shall connect to a public street or streets either directly or through a straight and unobstructed corridor equal in minimum width to the aggregate required width of exit; except that not more than one-third of the aggregate exit width may lead to alleys, courts or exit passageways complying with the requirements of Section 13-84-210. Foyers and connecting corridors may have ramps having a slope of not more than one in 10.

   (b)   In rooms of assembly units other than theaters, exits may lead to any horizontal or vertical means of exit complying with the requirements of Chapter 13-160.

   (c)   Vertical exits shall be cumulative between floors in case of open multileveled type spaces such as balconies and mezzanines in theaters.

(Prior code § 54-8.4)

13-84-210 Exit courts and exit passageways.

   Every exterior exit of an assembly unit shall open directly to a public way or to an exit court or exit passageway complying with the following requirements:

   (a)   Construction of Exit Courts. The walls of every exit court shall be of construction providing fire resistance of not less than three hours. No door opening shall be permitted in any wall of such court except the exit doors from the assembly unit. Such door openings shall be protected with Class D or Class E fire doors. Every window opening in the walls of an exit court located below a level 30 feet above the top of the highest exit doorway shall be protected with a fire window or other approved opening protective assembly complying with the requirements of Chapter 15-12.

   (b)   Construction of Exit Passageways. Every exit passageway shall be separated from other portions of the building by walls, floors and ceilings providing fire resistance of not less than three hours. There shall be no openings through such separation other than the required exit doors leading thereto.

   (c)   Width of Exit Courts and Exit Passageways. The minimum width of an exit court or exit passageway shall be not less than five feet, six inches. Such width shall be increased where necessary to provide a clear width at every point equal to 22 inches for each 90 persons served. Such increase in width shall be cumulative in the direction of exit.

   (d)   Ramps. Differences in level in exit courts and exit passageways shall be accommodated by ramps having a grade of not more than one in eight.

(Prior code § 54-8.5)