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(a) The interior of any building which adjoins a subway or other public space below grade not open to the sky, shall be separated from subway or other public space by walls or floors of solid masonry or reinforced concrete, or equal with a fire-resistive rating of not less than four hours.
(b) Every opening through a wall, required by this section to be used as an exit, shall be protected by a labeled outswinging Class A fire door. Such doors shall be equipped with approved panic hardware and may be single or pairs. Every other opening through such wall, not required as an exit shall be protected with a Class A fire door.
(c) No wall used in a separation required by this section shall be located more than twenty feet back from the subway or other public space. Show windows and display spaces may be located on the public side of such separating wall, but there shall not be more than one door opening into each show window or display space.
(d) Nothing in this section shall be construed to prevent the entire space under any building or any portion of such space, or any passage through a building from being used as a right-of-way or switching space for railroads or public carriers; provided, however, that such spaces or passages shall not be designed or used as a public thoroughfare nor as a parking space for motor vehicles where such use is prohibited by other sections of this Code; and provided further, that such space is separated from the interior and adjacent parts of the building as required by this section for subways.
(Prior code § 48-12.6)
For assembly units and open air assembly units, the occupancy content shall be based on the capacity of the rooms or spaces used for assembly purposes and shall be determined as follows:
(a) In rooms or spaces with fixed seating, the occupancy content shall be the actual number of seats provided. When no divisions between seats are provided, fixed seating shall be computed at 18 inches per person.
(b) In rooms or spaces without fixed seating, the occupancy content shall be determined by the dividing of the net floor area (excluding the areas occupied by elevators, toilet rooms, stairways, other shaft enclosures, and by permanent fixtures such as bowling alleys, bars, cigar counters, exit facilities, entrance vestibules, lunch counters and serving spaces for same, etc.) by the floor area per person established in the following table:
Occupancy Floor Area Per Person
(1) School classrooms (other than open plan schools) and recreation rooms 20 sq. ft.
(2) Open plan schools, school laboratories and shops 30 sq. ft.
(3) Museums, libraries and similar uses 20 sq. ft.
(4) Restaurants 15 sq. ft.
(5) Other assembly uses 6 sq. ft.
(6) Exhibition areas 20 sq. ft.
(7) Day care center – Class I 35 sq. ft.
(Prior code § 48-13.1)
In occupancies, other than assembly units, the occupancy contents shall be determined by dividing the net floor area within the perimeter of the space or building not including elevators, stairways, or other shaft enclosures by the floor area per person established in the following table:
Occupancy
Residential units 125
Institutional units (See Ch. 53-7(a)) 150
Business units 100(a)
Mercantile units
First floor 30
Basement sales floor 30
Other floors 60
Industrial units
Power plants 400
Other industrial units 100
Storage units 300
Note:
(a) In a building in which one or more technology centers are located, occupancy of the entire floor and the capacity of fire stairs shall be determined in accordance with the “net floor area” defined in Section 13-56-320. For individual tenant spaces qualifying as technology centers, the occupant load shall be determined on the basis of the “special (technology center) net floor” area which, in addition to the exclusion listed in Section 13-56-320, also excludes stationary computer equipment and computer machinery.
(Prior code § 48-13.2; Amend Coun. J. 6-28-00, p. 36679, § 6)