National Fire Protection Association Report
1 of 1
http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...
Second Revision No. 52-NFPA 72-2014 [ Section No. 2.3.4 ]
2.3.4 ISO Publications.
International Organization for Standardization, 1, ch. de la Voie-Creuse, Case postale 56,
CH-1211 Geneva 20, Switzerland.
ISO 7731, Danger signals for work places — Auditory danger signals, 2003 (Reconfirmed 2009) .
Submitter Information Verification
Submitter Full Name: Barry Chase
Organization:
National Fire Protection Assoc
Street Address:
City:
State:
Zip:
Submittal Date:
Thu Jul 03 13:48:05 EDT 2014
Committee Statement
Committee Statement: Reference updated.
Response Message:
Public Comment No. 100-NFPA 72-2014 [Section No. 2.3.4]
9/22/2014 2:09 PM
National Fire Protection Association Report
1 of 1
http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...
Second Revision No. 69-NFPA 72-2014 [ Section No. 18.4.2.3 ]
18.4.2.3
The signal shall be repeated for a period appropriate for the purposes of evacuation of the
building, but for not less than 180 seconds. The minimum repetition time shall be permitted to be
manually interrupted.
18.4.2.3.1
The minimum repetition time shall be permitted to be manually interrupted.
18.4.2.3.2
The minimum repitition time shall be permitted to be automatically interrupted for the
transmission of mass notification messages in accordance with Chapter 24 .
Submitter Information Verification
Submitter Full Name: Barry Chase
Organization:
National Fire Protection Assoc
Street Address:
City:
State:
Zip:
Submittal Date:
Mon Jul 07 16:14:06 EDT 2014
Committee Statement
Committee This statement seems inconsistent with the intention of MNS systems. Based on
Statement: circumstances, MNS may employ automatic messages to direct occupants under various
emergency situations. This section requires that evacuation signals may not be
automatically interrupted for three minutes. In that time, people may have responded (or not
responded) inappropriately because the nature of the emergency or the proper actions
could not be made clear to occupants in time. A reference to Chapter 24 was added for
correlation. In addition, the section was revised to meet the Manual of Style.
Response
Message:
Public Comment No. 227-NFPA 72-2014 [Section No. 18.4.2.3]
9/22/2014 2:11 PM
National Fire Protection Association Report
1 of 1
http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...
Second Revision No. 70-NFPA 72-2014 [ Section No. 18.4.5.3 ]
See SR-70
18.4.5.3 *
Effective January 1, 2014, audible Audible appliances provided for the sleeping areas to awaken
occupants shall produce a low frequency alarm signal that complies with the following:
(1) The alarm signal shall be a square wave or provide equivalent awakening ability.
(2) The wave waveform shall have a fundamental frequency of 520 Hz ± 10 percent.
(3) * The notification equipment shall be listed for producing the low frequency waveform.
Supplemental Information
File Name
Description
72_SR_70_A.18.4.5.3_3_edited.docx
Submitter Information Verification
Submitter Full Name: Barry Chase
Organization:
National Fire Protection Assoc
Street Address:
City:
State:
Zip:
Submittal Date:
Mon Jul 07 16:18:51 EDT 2014
Committee Statement
Committee
Statement:
The effective date was eliminated, since it has passed. Reference to product listing was
added to ensure that the correct waveform, frequency, and harmonics are included in the
appliance performance.
Response
Message:
Public Comment No. 22-NFPA 72-2014 [Section No. 18.4.5.3]
9/22/2014 2:11 PM
A.18.4.5.3(3) For the purposes of awakening, the low frequency signal can be
produced by a listed stand-alone appliance or by a listed system consisting of a
recorded waveform delivered through an amplifier and loudspeaker.
National Fire Protection Association Report
1 of 1
http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...
Second Revision No. 71-NFPA 72-2014 [ Section No. 18.5.3.2 ]
18.5.3.2 *
A The maximum light pulse duration shall be 0.2 second 20 milliseconds with a maximum duty
cycle of 40 percent.
Exception: Lights used to meet the requirements of 18.5.5.5 shall be permitted to be listed
and labeled to have pulse durations up to 100 milliseconds.
Supplemental Information
File Name
Description
72_SR_71_A.18.5.3.2_edited.docx
Submitter Information Verification
Submitter Full Name: Barry Chase
Organization:
National Fire Protection Assoc
Street Address:
City:
State:
Zip:
Submittal Date:
Mon Jul 07 16:27:50 EDT 2014
Committee Statement
Committee This change is needed because research has shown that the use of longer pulse widths
Statement: with lights rated using the concept of candela effective will result in poor detection
performance. Longer pulse widths must be combined with some as yet undetermined
increase in peak candela intensity in order to be effective. However, the research has shown
that strobes rated using candela effective and that have pulse widths up to 100 ms can be
effective in corridor, direct viewing application. Thus the allowance for their use in corridors
was needed. Additional work is being done to determine how the code should be modified to
have a performance metric that will work for lights with both long and short pulse durations.
Response
Message:
Public Comment No. 111-NFPA 72-2014 [Section No. 18.5.3.2]
Public Comment No. 3-NFPA 72-2014 [Section No. 18.5.3.2]
Public Comment No. 83-NFPA 72-2014 [Section No. 18.5.3.2]
9/22/2014 2:14 PM
A.18.5.3.2 New research using lights with longer pulse durations shows
that the existing tables for indirect signaling [Table 18.5.5.4.1(a) and
Table 18.5.5.4.1(b)] are inadequate to assure reliable notification. Until
additional work is done and incorporated into this Code, lights used for
indirect signaling and having effective intensities specified in Table
18.5.5.4.1(a) or Table 18.5.5.4.1(b) need to be short duration, high
intensity to be effective for the specified area of coverage. This
limitation does not apply to direct signaling such as that used in
corridors per in accordance with 18.5.5.5. For direct signaling in
corridors (18.5.5.5), longer pulse appliances (up to 100 ms) (SI?), such
as LED lights, have been shown to be effective. Longer pulse durations
might also be effective in large volume spaces that use direct signaling,
as discussed in A.18.5.4.
National Fire Protection Association Report
1 of 1
http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...
Second Revision No. 77-NFPA 72-2014 [ Section No. A.18.1 ]
A.18.1
Notification appliances should be sufficient in quantity, audibility, intelligibility, and visibility so as to
reliably convey the intended information to the intended personnel during an emergency.
Notification appliances in conventional commercial and industrial applications should be installed
in accordance with the specific requirements of Section Sections 18.4 and Section 18.5.
The Code recognizes that it is not possible to identify specific criteria sufficient to ensure effective
occupant notification in every conceivable application. If the specific criteria of
Section Sections 18.4 and Section 18.5 are determined to be inadequate or inappropriate to
provide the performance recommended, approved alternative approaches or methods are
permitted to be used.
Designers and AHJs are advised to consider alternative means in occupancies that have
individuals with cognitive disabilities. In addition, persons responsible for evacuation planning
should consider specific training for individuals with cognitive disabilities to familiarize them with
audible and visual signals and what responses are necessary based on their capabilities and any
alternative means used.
Submitter Information Verification
Submitter Full Name: Barry Chase
Organization:
National Fire Protection Assoc
Street Address:
City:
State:
Zip:
Submittal Date:
Mon Jul 07 17:00:57 EDT 2014
Committee Statement
Committee
Statement:
The new text alerts Authorities Having Jurisdiction, building owners, property managers,
testing and service personnel that additional training and notification be given to individuals
with special needs and staff so that an understanding of what to expect during an alarm
activation and testing of Protected Premise System’s and the actions that they should take
during these conditions. This is important in occupancies where persons with cognitive
disabilities are expected to be present, such as schools or other institutions.
Response
Message:
Public Comment No. 229-NFPA 72-2014 [Section No. A.18.1]
9/22/2014 2:16 PM