Transcript NFPA 72 Fire Alarms - Department of Building Inspection

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Meet the Pros
October 11, 2007
Special Thanks
Kevin Green
 Bill Hopple
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2002 NFPA 72
Fire Alarm Code
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All NFPA Standards have added three new
chapters up front
Chapter 1 – Administrative
Chapter 2 – Referenced Publications
Chapter 3 - Definitions
2002 NFPA 72
Fire Alarm Code
– Chapter 4 – Fundamentals (1)
– Chapter 5 – Initiating Devices (2)
– Chapter 6 – Protected Premises F/A Systems
(3)
– Chapter 7 – Notification Appliances (4)
– Chapter 8 – Supervising Station F/A Systems
(5)
– Chapter 9 – Public F/A Reporting Systems (6)
– Chapter 10 – Inspection, Testing &
Maintenance (7)
– Chapter 11 – Single and Multiple-Station
Alarms &
Household F/A
Interpetation
NFPA 72 shall not be interpreted to
require a level of fire protection that is
greater than that which would otherwise
be required by the applicable building or
fire code.
 NFPA 72 1.2.4*
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Voluntary Systems
Nonrequired (Voluntary) System. A fire
alarm system component or group of
components that is installed at the option
of the owner, and is not installed due to a
building or fire code requirement.
 State scope of work plainly.
 NFPA 72 3.3.111
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Survivability
Survivability is only required in partial evacuation
or relocation buildings.
All circuits necessary for operation of the
notification devices until they enter the
evacution zone they serve must either use:
1. 2-hour rated cable
2. 2-hour rated enclosure
3. AHJ approved method (Class A circuitry)
NFPA deleted the exception for using a 2-hour stair
enclosure
NFPA 72 6.9.4
Annunciation
All required annunciation means shall be
readily accessible to responding personnel
and located as required by the AHJ to
facilitate an efficient response to a fire
situation.
 NFPA 72 4.4.6.1.1
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LED Panels
Required if:
1. More that four floors (including
basements)
2. Unusually large floor areas
3. Unusually designed buildings – Podiums
with separate buildings on top
4. 2007 SFFC Appendix VI-J 3.02
LED Panels
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Must include each type of initiation device by
floor or area:
Manual Pull Station
Area Smoke Detector
Elevator Lobby Smoke Detector
Duct Smoke Detector
Heat Detector
Waterflow
Any Auxiliary alarm (Hood and Duct System)
Fire Pump & Generator points (if applicable)
Batteries
Month and Year of Manufacture
 May be field applied or factory embedded
 Must be replace within 5 years from date
of manufacture
 N.F.P.A 72 4.4.1.8.1 & Table 10.4.3
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Secondary Power
24 hours of backup power for non-alarm
condition for all systems
 Five minutes of backup power for alarm
condition (15 minutes for hi-rise)
 NFPA 72 4.4.1.5.3
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Initiating Devices
Actuation Time
Actuation of an alarm notification device,
fire safety function, and annunciation shall
occur within 10 seconds after activation of
an initiating device.
 The Annex explains that the fire safety
functions do not have to be complete in
the 10 seconds, just started.
 NFPA 72 6.8.1.1
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Pull Stations
The operable part of each manual fire
alarm box shall be not less than 3½ and
not more that 4 feet above floor level.
 NFPA 72 5.12.4 amended by CBC
Chapter 35
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Elevator/Shunt Trip
Confirms heat detectors used for shunt
must be tied to the FACP.
 Annex provides for a delay so that
elevator car can be recalled.
 New and existing hi-rises will not require
this if built per the SFFC.
 NFPA 72 6.15.4 SFFC 914.3.1.4
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Notification Appliances
Deleted the general minimum 75 dBA
requirement.
 Maintains 15 Db above ambient
requirement.
 NFPA 72 7.4.2.1
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California Amendment
NFPA 72 7.4.1.2 allows sound levels to be
120 dBA.
 2007 CBC Chapter 35 limits this to 110
dBA.
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Notification Appliances
Sleeping areas now require 75 dBA at the
pillow level.
 NFPA 7.4.4.1
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Corridor Strobes
Follow either NFPA 7.5.4.1 or 7.5.4.2
1. Room spacing rules
2. Corridor spacing rules
3. NFPA 72 7.5.4.2.4
Strobe Coverage
More than two strobes in any room will
always require synchroniztion.
 NFPA 7.5.4.1.2
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2007 CBC & CFC
Items of Interest
907.2.2 B occupancies of 500 or more
occupants, or more than 99 occupants
above the lowest level of discharge require
a manual fire alarm system.
 907.2.3 E occupancies with occupant load
of 50 or more, or more than one
classroom require full coverage smoke
detection.
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2007 CBC & CFC
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907.14Fire Alarm Systems required by
CBC Chapter 9 must be monitored by a
supervising station.
Exceptions:
Smoke detectors required by 907.2.10
I-3 occupancies follow 907.2.6.3
Auto sprinklers in R-3’s