Bulletin # 35
Department of Planning and Land Services, July 2013
Division of Building Safety and Inspection for 2012 I Codes
The International Residential Code requires that smoke alarms be installed in multiple locations throughout dwelling units in new construction and dwellings undergoing alterations, repairs or additions. Smoke alarms must be wired to the building power supply and be interconnected in most occurrences as explained in this bulletin.
园博会
Smoke Alarm Locations IRC R314.3:
Smoke alarms shall be installed in the following locations:
1. In each sleeping room.
2. Outside each parate sleeping area in the immediate vicinity of the
bedrooms.
3. On each additional story of the dwelling, including baments and habitable
attics but not including crawl spaces and uninhabitable attics. In dwellings or
dwelling units with split levels and without an intervening door between the
adjacent levels, a smoke alarm installed on the upper level shall suffice for the
adjacent lower level provided that the lower level is less than one full story below
the upper level.
4. In napping areas in a family home child care.
Alterations, Repairs, & Additions R314.3.1:
When alterations, repairs or additions requiring a permit occur, or when one or more sleeping rooms are added or created in existing dwellings, the individual dwelling unit shall be equipped with smoke alarms as required for new dwellings.
Exceptions:
对婚姻的理解
α氨基酸1. Work involving the exterior surfaces of dwellings, such as the
replacement of roofing or siding, or the addition or replacement of
离婚怎么办理windows or doors, or the addition of a porch or deck are exempt from the
requirements of this ction.
2. Installation, alteration or repairs of plumbing, electrical or mechanical
systems are exempt from the requirements of this ction.
Power Source R314.4:
Smoke alarms shall receive their primary power from the building wiring when such wiring is rved from a commercial source, and when primary power is interrupted, shall receive power from a battery. Wiring shall be permanent and without a disconnecting switch other than tho required for overcurrent protection.
Exceptions:
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1. Smoke alarms shall be permitted to be battery operated when installed in
buildings without commercial power.
2. Hard wiring of smoke alarms in existing areas shall not be required where the
alterations or repairs do not result in the removal of interior wall or ceiling finishes
exposing the structure, unless there is an attic, crawl space or bament
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新学期新气象available which could provide access for hard wiring without the removal of
interior finishes.
Interconnection R314.5:
Where more than one smoke alarm is required to be installed within an individual dwelling unit in accordance with Section R314.3, the alarm devices shall be interconnected in such a manner that the actuation of one alarm will activate all of the alarms in the individual unit. Physical interconnection of smoke alarms shall not be required where listed wireless alarms are installed and all alarms sound upon activation
of one alarm.
Exception:怎么考研究生
Interconnection of smoke alarms in existing areas shall not be required where
alterations or repairs do not result in removal of interior wall or ceiling finishes
exposing the structure, unless there is an attic, crawl space or bament
available which could provide access for interconnection without the removal of
interior finishes.
Additional Requirements:
In addition to the smoke alarms the International Residential Code requires the installation of Carbon Monoxide Alarms in new and existing dwelling units. Refer to Pierce County Bulletin # 51 and International Residential Code Section R315 for further information.
