Page 159 - 2018_IFC

FIRE PROTECTION AND LIFE SAFETY SYSTEMS

that contains a bathtub or shower unless this would pre- 907.2.11.2 System response. The activation of two or
vent placement of a smoke alarm required by Section more smoke detectors, a single smoke detector
907.2.10.1 or 907.2.10.2. equipped with an alarm verification feature, the auto-
matic sprinkler system or other approved fire detection
907.2.10.5 Interconnection. Where more than one
smoke alarm is required to be installed within an indi- device shall automatically do all of the following:
vidual dwelling unit or sleeping unit in Group R or I-1 1. Cause illumination of the means of egress with
occupancies, the smoke alarms shall be interconnected light of not less than 1 footcandle (11 lux) at the
in such a manner that the activation of one alarm will walking surface level.
activate all of the alarms in the individual unit. Physi- 2. Stop any conflicting or confusing sounds and
cal interconnection of smoke alarms shall not be visual distractions.
required where listed wireless alarms are installed and
all alarms sound upon activation of one alarm. The 3. Activate an approved directional exit marking
alarm shall be clearly audible in all bedrooms over that will become apparent in an emergency.
background noise levels with all intervening doors 4. Activate a prerecorded message, audible through-
closed. out the special amusement building, instructing
patrons to proceed to the nearest exit. Alarm sig-
907.2.10.6 Power source. In new construction,
required smoke alarms shall receive their primary nals used in conjunction with the prerecorded
power from the building wiring where such wiring is message shall produce a sound that is distinctive
served from a commercial source and shall be equipped from other sounds used during normal operation.
with a battery backup. Smoke alarms with integral 907.2.11.3 Emergency voice/alarm communication
strobes that are not equipped with battery back-up shall system. An emergency voice/alarm communication
be connected to an emergency electrical system in system, which is allowed to serve as a public address
accordance with Section 1203. Smoke alarms shall emit system, shall be installed in accordance with Section
a signal when the batteries are low. Wiring shall be per- 907.5.2.2 and be audible throughout the entire special
manent and without a disconnecting switch other than amusement building.
as required for overcurrent protection. 907.2.12 High-rise buildings. High-rise buildings shall
Exception: Smoke alarms are not required to be be provided with an automatic smoke detection system in
equipped with battery backup where they are con- accordance with Section 907.2.12.1, a fire department
nected to an emergency electrical system that com- communication system in accordance with Section
plies with Section 604. 907.2.12.2 and an emergency voice/alarm communication
system in accordance with Section 907.5.2.2.
907.2.10.7 Smoke detection system. Smoke detectors
listed in accordance with UL 268 and provided as part Exceptions:
of the building fire alarm system shall be an acceptable 1. Airport traffic control towers in accordance with
alternative to single- and multiple-station smoke alarms
Section 907.2.21 of this code and Section 412 of
and shall comply with the following: the International Building Code.
1. The fire alarm system shall comply with all appli- 2. Open parking garages in accordance with Section
cable requirements in Section 907.
406.5 of the International Building Code.
2. Activation of a smoke detector in a dwelling unit 3. Buildings with an occupancy in Group A-5 in
or sleeping unit shall initiate alarm notification in accordance with Section 303.1 of the Interna-
the dwelling unit or sleeping unit in accordance
tional Building Code.
with Section 907.5.2.
4. Low-hazard special occupancies in accordance
3. Activation of a smoke detector in a dwelling unit with Section 503.1.1 of the International Build-
or sleeping unit shall not activate alarm notifica-
ing Code.
tion appliances outside of the dwelling unit or
sleeping unit, provided that a supervisory signal 5. Buildings with an occupancy in Group H-1, H-2
is generated and monitored in accordance with or H-3 in accordance with Section 415 of the
International Building Code.
Section 907.6.6.
6. In Group I-1 and I-2 occupancies, the alarm shall
907.2.11 Special amusement buildings. An automatic
smoke detection system shall be provided in special sound at a constantly attended location and occu-
pant notification shall be broadcast by the emer-
amusement buildings in accordance with Sections
gency voice/alarm communication system.
907.2.11.1 through 907.2.11.3.
907.2.11.1 Alarm. Activation of any single smoke 907.2.12.1 Automatic smoke detection. Automatic
smoke detection in high-rise buildings shall be in
detector, the automatic sprinkler system or any other
accordance with Sections 907.2.12.1.1 and
automatic fire detection device shall immediately acti-
vate an audible and visible alarm at the building at a 907.2.12.1.2.
constantly attended location from which emergency 907.2.12.1.1 Area smoke detection. Area smoke
action can be initiated, including the capability of man- detectors shall be provided in accordance with this
ual initiation of requirements in Section 907.2.11.2. section. Smoke detectors shall be connected to an
126 2018 INTERNATIONAL FIRE CODE ®
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