Page 100 - 2018_IRC

BUILDING PLANNING

other surface below on the exterior of the building, the R314.2.2 Alterations, repairs and additions. Where
operable window shall comply with one of the following: alterations, repairs or additions requiring a permit occur,
the individual dwelling unit shall be equipped with smoke
1. Operable window openings will not allow a 4-inch-
diameter (102 mm) sphere to pass through where the alarms located as required for new dwellings.
openings are in their largest opened position. Exceptions:
2. Operable windows are provided with window fall pre- 1. Work involving the exterior surfaces of dwell-
vention devices that comply with ASTM F2090. ings, such as the replacement of roofing or siding,
3. Operable windows are provided with window open- the addition or replacement of windows or doors,
ing control devices that comply with Section or the addition of a porch or deck.
R312.2.2. 2. Installation, alteration or repairs of plumbing or
R312.2.2 Window opening control devices. Window mechanical systems.
opening control devices shall comply with ASTM F2090. R314.3 Location. Smoke alarms shall be installed in the fol-
The window opening control device, after operation to lowing locations:
release the control device allowing the window to fully
open, shall not reduce the net clear opening area of the win- 1. In each sleeping room.
dow unit to less than the area required by Section R310.2.1. 2. Outside each separate sleeping area in the immediate
vicinity of the bedrooms.
SECTION R313 3. On each additional story of the dwelling, including
AUTOMATIC FIRE SPRINKLER SYSTEMS basements and habitable attics and not including crawl
spaces and uninhabitable attics. In dwellings or dwell-
R313.1 Townhouse automatic fire sprinkler systems. An ing units with split levels and without an intervening
automatic residential fire sprinkler system shall be installed door between the adjacent levels, a smoke alarm
in townhouses. installed on the upper level shall suffice for the adjacent
Exception: An automatic residential fire sprinkler system lower level provided that the lower level is less than
shall not be required where additions or alterations are one full story below the upper level.
made to existing townhouses that do not have an automatic 4. Smoke alarms shall be installed not less than 3 feet
residential fire sprinkler system installed. (914 mm) horizontally from the door or opening of a
R313.1.1 Design and installation. Automatic residential bathroom that contains a bathtub or shower unless this
fire sprinkler systems for townhouses shall be designed would prevent placement of a smoke alarm required by
and installed in accordance with Section P2904 or NFPA this section.
13D. R314.3.1 Installation near cooking appliances. Smoke
R313.2 One- and two-family dwellings automatic fire alarms shall not be installed in the following locations
sprinkler systems. An automatic residential fire sprinkler unless this would prevent placement of a smoke alarm in a
system shall be installed in one- and two-family dwellings. location required by Section R314.3.
Exception: An automatic residential fire sprinkler system 1. Ionization smoke alarms shall not be installed less
shall not be required for additions or alterations to exist- than 20 feet (6096 mm) horizontally from a perma-
ing buildings that are not already provided with an auto- nently installed cooking appliance.
matic residential sprinkler system.
2. Ionization smoke alarms with an alarm-silencing
R313.2.1 Design and installation. Automatic residential switch shall not be installed less than 10 feet (3048
fire sprinkler systems shall be designed and installed in mm) horizontally from a permanently installed cook-
accordance with Section P2904 or NFPA 13D. ing appliance.
3. Photoelectric smoke alarms shall not be installed
SECTION R314 less than 6 feet (1828 mm) horizontally from a per-
SMOKE ALARMS manently installed cooking appliance.
R314.1 General. Smoke alarms shall comply with NFPA 72 R314.4 Interconnection. Where more than one smoke alarm
and Section R314. is required to be installed within an individual dwelling unit
in accordance with Section R314.3, the alarm devices shall be
R314.1.1 Listings. Smoke alarms shall be listed in accor- interconnected in such a manner that the actuation of one
dance with UL 217. Combination smoke and carbon mon- alarm will activate all of the alarms in the individual dwelling
oxide alarms shall be listed in accordance with UL 217 unit. Physical interconnection of smoke alarms shall not be
and UL 2034. required where listed wireless alarms are installed and all
R314.2 Where required. Smoke alarms shall be provided in alarms sound upon activation of one alarm.
accordance with this section. R314.5 Combination alarms. Combination smoke and car-
R314.2.1 New construction. Smoke alarms shall be pro- bon monoxide alarms shall be permitted to be used in lieu of
vided in dwelling units. smoke alarms.

2018 INTERNATIONAL RESIDENTIAL CODE ® 75
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