AZ Smoke Alarm Requirments

This document contains information that was collected as accurately as possible, however, some or all information may change, without notice, at any time. This document should be used for reference purposes only and should not be considered an official state-specific document of smoke alarm requirements, nor should it be considered official guidelines or policies of the United States Fire Administration.

Arizona Fire Marshal
http://www.dfbls.az.gov/ofm.aspx

Regulations/Standards
The following requirements are specific to the City of Tucson, AZ and other cities that have adopted the 2006 IFC with amendments. The Office of the State Fire Marshal applies the adopted 2003 IFC and 2002 nfpa-72 with no amendments for residential dwellings units of 5 or more.
No specific type of home alarm is mandated for residents. Each “type” of alarm (ionization or photoelectric) works better in different situations. Smoke alarms shall be installed in new and existing homes.
Installation
General guidelines for smoke alarm placement:
1. In sleeping areas.
2. In every room in the path of the means of egress from the sleeping area to the door leading from the sleeping unit.
3. In each story within the sleeping unit, including basements. For sleeping 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.
Guidelines for connecting the smoke alarm:
There are separate regulations for connecting smoke alarms in new and existing homes. In new construction, required smoke alarms shall receive their primary power from the building wiring where such wiring is served from a commercial source and shall be equipped with a battery backup. Smoke alarms shall emit a signal when the batteries are low. Wiring shall be permanent and without a disconnecting switch other than as required for over current protection.
Exception:
Smoke alarms are not required to be equipped with battery backup in Group R-1 where they are connected to an emergency electrical system.
Interconnection.
Where more than one smoke alarm is required to be installed within an individual dwelling unit or sleeping unit in Group R-2, R-3 or R-4, or within an individual sleeping unit in Group R-1, the smoke alarms shall be interconnected in such a manner that the activation of one alarm will activate all of the alarms in the individual unit.

The alarm shall be clearly audible in all bedrooms over background noise levels with all intervening doors closed.

For existing building the requirements are: 907.3.2.3
Power source.
In Group R occupancies, single-station smoke alarms shall receive their primary power from the building wiring provided that such wiring is served from a commercial source and shall be equipped with a battery backup. Smoke alarms shall emit a signal when the batteries are low. Wiring shall be permanent and without a disconnecting switch other than as required for over current protection.

Exception:
Smoke alarms are permitted to be solely battery operated: in existing buildings where no construction is taking place; in buildings that are not served from a commercial power source; and in existing areas of buildings undergoing alterations or repairs that do not result in the removal of interior walls or ceiling finishes exposing the structure, unless there is an attic, crawl space or basement available which could provide access for building wiring without the removal of interior finishes.
907.3.2.2 Interconnection.
Where more than one smoke alarm is required to be installed within an individual dwelling unit in Group R-2, R-3 or R-4, or within an individual sleeping unit in Group R-1, the smoke alarms shall be interconnected in such a manner that the activation of one alarm will activate all of the alarms in the individual unit. The alarm shall be clearly audible in all bedrooms over background noise levels with all intervening doors closed.
Exceptions:
1. Interconnection is not required in buildings that are not undergoing alterations, repairs or construction of any kind.
2. Smoke alarms in existing areas are not required to be interconnected where 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 basement available which could provide access for interconnection without the removal of interior finishes.
For more information, please see: International Fire Code 2006
Contact:
Robert Barger, State Fire Marshal
1110 West Washington, Suite 100
Phoenix, AZ 85007
Phone: 602-364-1003
Fax: 602-364-1084
Email: Bob.barger@dfbls.az.gov

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