13-160-220  Minimum width of exits.
   The width of required exits shall comply with the requirements of Section 13-160-210 as to capacity, but in no case shall such width be less than the minimum widths required in this section.
   (a)   Doors. All doors required as exits shall be not less than 36 inches wide with the following exceptions:
      (1)   In all occupancies, except in public buildings, exit doors from rooms or spaces having a capacity not exceeding 20 persons shall be not less than 28 inches in width.
      (2)   In residential units, exit doors serving only one dwelling unit shall be not less than 32 inches in width.
      (3)   In institutional units, exit doors from rooms and spaces serving bedridden patients shall be not less than 44 inches in width.
      (4)   To provide accessibility to the handicapped in all public buildings, doors to all rooms shall be a minimum width of 30 inches.
      (5)   In nursing homes and sheltered care facilities all required exterior exit doors used in connection with exits from the building shall not be less than 44 inches in width.
      In existing licensed institutional homes that upgrade to a nursing home classification, the required exterior exit doors shall not be less than 36 inches in width.
      (6)   In nursing homes, hospitals, and sheltered care facilities doors from patient bedrooms shall be not less than 44 inches in width. The doors shall not project into the corridor and shall be equipped with a positive latch or a roller latch. The roller latch shall operate at a minimum applied force of eight pounds.
      (7)   In nursing homes, hospitals and sheltered care facilities all exit door openings in stairwells shall have a minimum width of 44 inches, with an observation panel of standard clear wire glass one- quarter inch thick having exposed area not exceeding 100 square inches and a width or height not exceeding 12 inches.
      (8)   In nursing homes and sheltered care facilities toilet rooms other than employees and public shall have a minimum door width of 3 feet and the door shall swing out.
      (9)   In intermediate care facilities for the developmentally disabled – 15 or less, all doors required as exterior exits shall have a minimum width of three feet and shall swing out.
   (b)   Stairs and Corridors. All stairs and corridors required as exits shall be not less than 44 inches in width with the following exceptions:
      (1)   In all occupancies except nursing homes, hospitals and sheltered care facilities, stairs and corridors in buildings with a total occupancy of 50 persons or less above the grade level, as defined in Section 13-4-010, shall not be less than 36 inches wide.
      (2)   Within both single-family (A1) and multiple dwelling (A2) residential units, stairs and corridors serving only one dwelling unit shall be not less than 36 inches in width.
      (3)   Reserved.
      (4)   In institutional units, corridors required as exits for patients shall be not less than 60 inches in width.
      (5)   In Type I schools, corridors required as exits from classrooms, study rooms or assembly rooms shall be not less than 60 inches in width.
      (6)   In nursing homes, hospitals and sheltered care facilities exit stair widths shall not be less than 44 inches. In existing licensed institutional homes that upgrade to a nursing home classification, the exit stairs shall be not less than 36 inches in width serving not more than 40 persons per floor.
      (7)   In nursing homes, hospitals and sheltered care facilities all corridors required as exits for patient sleeping and treatment areas shall not be less than eight feet in width. In existing licensed institutional homes that upgrade to a nursing home classification, the corridors required as exits for patients shall not be less than five feet in width except as provided in Chapter 13-196.
      (8)   In intermediate care facilities for the developmentally disabled – 15 or less, stairs serving residents and all corridors shall be not less than 36 inches in width.
   (c)   In open plan schools, all egress paths leading from individual teaching areas to all exits shall be not less than 60 inches in width.
   (d)   The minimum width of a mall shall be 30' 0". A minimum clearance of ten feet shall be maintained from the furthest projection on a store front to any obstruction in the mall.
      (1)   Walls above ceilings between the covered mall and the tenant spaces shall be of noncombustible materials. Store fronts of tenant spaces shall be open or of noncombustible materials.
   (e)   Mall levels above the lowest level existing on grade shall have floor openings with a minimum dimension of 12 feet clear. The opening in each floor in the upper levels shall be evenly distributed throughout and shall contain a minimum of 35 percent of that mall floor and shall be no less than 20 times the vent area required for the greatest mall area.
(Prior code § 67-7.5; Amend Coun. J. 12-21-84, p. 12140; Amend Coun. J. 10-28-97, p. 54731)