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In buildings that are protected by an automatic sprinkler system in accordance with Section 9.7, dwelling units of an apartment building shall be permitted to have their sole means of egress pass through a nonresidential occupancy in the same building, provided that both of the following criteria are met:
In buildings that are not protected by an automatic sprinkler system in accordance with Section 9.7, dwelling units of an apartment building shall be permitted to have their sole means of egress pass through a nonresidential occupancy in the same building, provided that all of the following criteria are met:
- The sole means of egress from the dwelling unit of the apartment building to the exterior shall be separated from the remainder of the building by fire barriers having a minimum 1-hour fire resistance rating.
- The dwelling unit of the apartment building shall comply with Chapter 30.
- The sole means of egress from the dwelling unit of the apartment building shall not pass through a high hazard contents area, as defined in 188.8.131.52.
Multiple dwelling units shall be permitted to be located above a nonresidential occupancy only where one of the following conditions exists:
- Where the dwelling units of the residential occupancy and exits therefrom are separated from the nonresidential occupancy by construction having a minimum 1-hour fire resistance rating
- Where the nonresidential occupancy is protected throughout by an approved, supervised automatic sprinkler system in accordance with Section 9.7
Special terms applicable to this chapter are defined in Chapter 3. Where necessary, other terms are defined in the text.
The occupant load, in number of persons for whom means of egress and other provisions are required, shall be determined on the basis of the occupant load factors of Table 184.108.40.206 that are characteristic of the use of the space or shall be determined as the maximum probable population of the space under consideration, whichever is greater.
Corridors with a required capacity of not more than 50 persons, as defined in Section 7.3, shall be not less than 36 in. (915 mm) in width.
Dwelling units shall be permitted to have access to a single exit, provided that one of the following conditions is met:
- The dwelling unit has an exit door opening directly to the street or yard at the finished ground level.
- The dwelling unit has direct access to an outside stair that complies with 7.2.2 and serves a maximum of two units, both of which are located on the same story.
- The dwelling unit has direct access to an interior stair that serves only that unit and is separated from all other portions of the building by fire barriers having a minimum 1-hour fire resistance rating, with no opening therein.
A single exit shall be permitted in buildings where the total number of stories does not exceed four, provided that all of the following conditions are met:
- There are four or fewer dwelling units per story.
- The building is protected throughout by an approved, supervised automatic sprinkler system in accordance with 30.3.5.
- The exit stairway does not serve more than one-half story below the level of exit discharge.
- The travel distance from the entrance door of any dwelling unit to an exit does not exceed 35 ft (10.7 m).
- The exit stairway is completely enclosed or separated from the rest of the building by barriers having a minimum 1-hour fire resistance rating.
- All openings between the exit stairway enclosure and the building are protected with self-closing door assemblies having a minimum 1-hour fire protection rating.
- All corridors serving as access to exits have a minimum 1-hour fire resistance rating.
- Horizontal and vertical separation having a minimum 1/2-hour fire resistance rating is provided between dwelling units.
The use of Section 7.13 shall be prohibited.
The areas described in Table 220.127.116.11.1 shall be protected as indicated.
Table 18.104.22.168.1 Hazardous Area Protection
|Hazardous Area Description||Separation/Protection†|
|Boiler and fuel-fired heater rooms serving more than a single dwelling unit||1 hour and sprinklers|
|Employee locker rooms||1 hour or sprinklers|
|Gift or retail shops||1 hour or sprinklers|
|Bulk laundries||1 hour and sprinklers|
|Laundries ≤ 100 ft2 (≤ 9.3 m2) outside of dwelling units||1 hour or sprinklers‡|
|Laundries > 100 ft2 (> 9.3 m2) outside of dwelling units||1 hour and sprinklers|
|Maintenance shops||1 hour and sprinklers|
|Storage rooms outside of dwelling units||1 hour or sprinklers|
|Trash collection rooms||1 hour and sprinklers|
† Minimum fire resistance rating.
A fire alarm system shall not be required in buildings where each dwelling unit is separated from other contiguous dwelling units by fire barriers (see Section 8.3) having a minimum 1-hour fire resistance rating, and where each dwelling unit has either its own independent exit or its own independent stairway or ramp discharging at the finished ground level.
Carbon monoxide alarms or carbon monoxide detectors in accordance with Section 9.12 and 22.214.171.124 shall be provided in new apartment buildings where either of the following conditions exists:
Carbon monoxide alarms and carbon monoxide detectors as specified in 126.96.36.199.1(1) shall not be required in the following locations:
Where fuel-burning appliances or fuel-burning fireplaces are installed outside dwelling units, carbon monoxide alarms or carbon monoxide detectors shall be installed in accordance with the manufacturer's published instructions in the locations specified as follows:
- On the ceilings of rooms containing permanently installed fuel-burning appliances or fuel-burning fireplaces
- Centrally located within occupiable spaces served by the first supply air register from a permanently installed, fuel-burning HVAC system
- Centrally located within occupiable spaces adjacent to a communicating attached garage
Where an automatic sprinkler system is installed, either for total or partial building coverage, the system shall be installed in accordance with Section 9.7, as modified by 188.8.131.52 and 184.108.40.206. In buildings four or fewer stories above grade plane, systems in accordance with NFPA 13R, Standard for the Installation of Sprinkler Systems in Low-Rise Residential Occupancies, shall be permitted.
In buildings sprinklered in accordance with NFPA 13, Standard for the Installation of Sprinkler Systems, closets less than 12 ft2 (1.1 m2) in area in individual dwelling units shall not be required to be sprinklered. Closets that contain equipment such as washers, dryers, furnaces, or water heaters shall be sprinklered, regardless of size.
Listed quick-response or listed residential sprinklers shall be used throughout all dwelling units.
Spaces shall be permitted to be unlimited in area and open to the corridor, provided that the following criteria are met:
Alcohol-based hand-rub dispensers in accordance with 220.127.116.11 shall be permitted.
Heating, ventilating, and air-conditioning equipment shall comply with the provisions of Section 9.2.
Unvented fuel-fired heaters, other than gas space heaters in compliance with NFPA 54, National Fuel Gas Code, shall not be used.
Elevators, escalators, and conveyors shall comply with the provisions of Section 9.4.
Waste chutes, incinerators, and laundry chutes shall comply with the provisions of Section 9.5.
Furnishings or decorations of an explosive or highly flammable character shall not be used outside of dwelling units.
Fire-retardant coatings shall be maintained to retain the effectiveness of the treatment under service conditions encountered in actual use.