Security Sales & Integration September 2021 - 26

SMARTS & PARTS
Fireside Chat by Shane Clary
Elevator Smoke
Detector Requirement
Is the Pits
I am not
in favor of
having smoke
detectors
being located
within the
pit. The issue
regarding
a buildup
of trash
within the pit
should be a
maintenance
requirement
of the building
owner.
▶ SINCE THE 2013 EDITION of NFPA 72,
Th e National Fire Alarm and Signaling Code,
there has been a requirement that a smoke detector
be installed with the elevator pit if a sprinkler
is also installed within the pit. Th e sprinkler has
been placed there due to a history of fi res occurring
within pits because of a buildup trash that
can occur within a pit.
I am not in favor of having smoke detectors
being located within the pit. Th e issue regarding a
buildup of trash within the pit should be a maintenance
requirement of the building owner. Th e
pits themselves can become dirty and be subject
to unwanted alarms. Th e location of the detector
also is diffi cult to reach for inspection and testing.
Typically, arrangements with the elevator service
provider needs to be made prior to the inspection
call. Th e fi re alarm inspector should never enter
a pit without an elevator technician being onsite.
Th ere were no direct references for a smoke
detector to be installed within the pit through
the 2010 edition. During the proposal stage for
the 2013 edition, there was a proposal by Peter
Leszczak of the U.S. Department of Veterans Affairs
to add a new provision within the standard.
21.3.6 Smoke detectors shall not be installed in
elevator pits.
Shane Clary, Ph.D., has
more than 45 years of
security and fi re alarm
industry experience. He
serves on a number of
NFPA technical committees,
and is Vice President of
Codes and Standards
Compliance for Concord,
Calif.-headquartered Bay
Alarm Co.
26
Th e substantiation that was provided was that
" elevator pit smoke detectors only provide nuisance
fi re alarms and that these areas are typically
very dirty. " Th ere were no negative votes for the
Technical Committee on Protected Premises Fire
Alarm Signaling Systems.
It was during the comment phase that this
took a 180. Th omas Hammerberg representing
the Automatic Fire Alarm Association submitted
a comment to change the Technical Committee
action to a reject, which would remove the
restriction. Th e substantiation was, " Presently
there are many smoke detectors located in elevator
pits that are operating properly and without
nuisance trip problems. " Hammerberg also referSecurity
Sales & Integration SEPTEMBER 2021
smclary@bayalarm.com
enced detection products that are designed for a
harsher environment.
Th e Technical Committee accepted principle
for this recommendation. Th e revised text that
was agreed to was:
21.3.9 Where smoke detectors are installed in the
pit to initiate elevator recall, the smoke detector
shall be listed for the environment.
Th e Technical Correlating Committee then
made further refi nements by directing that
21.3.9 be changed to:
21.3.9*Smoke detectors shall not be installed in elevator
pits to initiate elevator recall unless the smoke
detector is listed for the environment.
Within
the 2013 edition,
in
addition
to
21.3.9, which became 21.3.8, the following provisions
relative to detection with elevator pits was
now within NFPA 72.
21.3.7 *
When sprinklers are installed in elevator pits, automatic
fi re detection shall be installed to initiate
elevator recall in accordance with 2.27.3.2.1(c) of
ANSI/ASME A.17.1/CSA B44, Safety Code for Elevators
and Escalators, and the following shall apply:
(2) Where sprinklers are located in the bottom of the
hoistway (the pit), fi re detection device(s) shall be
installed in the pit in accordance with Chapter 17.
21.3.9 *If ambient conditions prohibit installation
of automatic smoke detection, other automatic fi re
detection shall be permitted.
With the publication of the 2019 edition, the
requirements have stayed the same, just with
a change with the order of the paragraphs and
some minor tweaks with the language. Th e key is
that if there is installed a sprinkler in the pit, that
the designer needs to take into consideration the
environment that the detector will be in.
As was mentioned by Hammerberg in 2012,
there are other availavble means of detection
technology. Th is includes air aspiration systems
in which the detector is through piping in which
the air is being sampled and if the products of
combustion is detected, there would be an activation
of the system. Th ese system also can be
tested without the requirement of entry into the
hoistway or pit. A means of cleaning the sampling
ports must be provided as well, which can
be the injection of compressed air into the sampling
tubes so as to blow out any dust or accumulated
dirt that may have built up.
securitysales.com
http://www.securitysales.com

Security Sales & Integration September 2021

Table of Contents for the Digital Edition of Security Sales & Integration September 2021

Security Sales & Integration September 2021 - Bellyband Front
Security Sales & Integration September 2021 - Bellyband Back
Security Sales & Integration September 2021 - Cover Tip Front
Security Sales & Integration September 2021 - Cover Tip Back
Security Sales & Integration September 2021 - Cover 1
Security Sales & Integration September 2021 - Cover 2
Security Sales & Integration September 2021 - 1
Security Sales & Integration September 2021 - 2
Security Sales & Integration September 2021 - 3
Security Sales & Integration September 2021 - 4
Security Sales & Integration September 2021 - 5
Security Sales & Integration September 2021 - 6
Security Sales & Integration September 2021 - 7
Security Sales & Integration September 2021 - 8
Security Sales & Integration September 2021 - 9
Security Sales & Integration September 2021 - 10
Security Sales & Integration September 2021 - 11
Security Sales & Integration September 2021 - 12
Security Sales & Integration September 2021 - 13
Security Sales & Integration September 2021 - 14
Security Sales & Integration September 2021 - 15
Security Sales & Integration September 2021 - 16
Security Sales & Integration September 2021 - 17
Security Sales & Integration September 2021 - 18
Security Sales & Integration September 2021 - 19
Security Sales & Integration September 2021 - 20
Security Sales & Integration September 2021 - 21
Security Sales & Integration September 2021 - 22
Security Sales & Integration September 2021 - 23
Security Sales & Integration September 2021 - 24
Security Sales & Integration September 2021 - 25
Security Sales & Integration September 2021 - 26
Security Sales & Integration September 2021 - 27
Security Sales & Integration September 2021 - 28
Security Sales & Integration September 2021 - 29
Security Sales & Integration September 2021 - 30
Security Sales & Integration September 2021 - 31
Security Sales & Integration September 2021 - 32
Security Sales & Integration September 2021 - 33
Security Sales & Integration September 2021 - 34
Security Sales & Integration September 2021 - 35
Security Sales & Integration September 2021 - 36
Security Sales & Integration September 2021 - 37
Security Sales & Integration September 2021 - 38
Security Sales & Integration September 2021 - 39
Security Sales & Integration September 2021 - 40
Security Sales & Integration September 2021 - 41
Security Sales & Integration September 2021 - 42
Security Sales & Integration September 2021 - 43
Security Sales & Integration September 2021 - 44
Security Sales & Integration September 2021 - 45
Security Sales & Integration September 2021 - 46
Security Sales & Integration September 2021 - 47
Security Sales & Integration September 2021 - 48
Security Sales & Integration September 2021 - 49
Security Sales & Integration September 2021 - 50
Security Sales & Integration September 2021 - 51
Security Sales & Integration September 2021 - 52
Security Sales & Integration September 2021 - 53
Security Sales & Integration September 2021 - 54
Security Sales & Integration September 2021 - 55
Security Sales & Integration September 2021 - 56
Security Sales & Integration September 2021 - 57
Security Sales & Integration September 2021 - 58
Security Sales & Integration September 2021 - 59
Security Sales & Integration September 2021 - 60
Security Sales & Integration September 2021 - 61
Security Sales & Integration September 2021 - 62
Security Sales & Integration September 2021 - 63
Security Sales & Integration September 2021 - 64
Security Sales & Integration September 2021 - 65
Security Sales & Integration September 2021 - 66
Security Sales & Integration September 2021 - 67
Security Sales & Integration September 2021 - 68
Security Sales & Integration September 2021 - 69
Security Sales & Integration September 2021 - 70
Security Sales & Integration September 2021 - 71
Security Sales & Integration September 2021 - 72
Security Sales & Integration September 2021 - 73
Security Sales & Integration September 2021 - 74
Security Sales & Integration September 2021 - 75
Security Sales & Integration September 2021 - 76
Security Sales & Integration September 2021 - 77
Security Sales & Integration September 2021 - 78
Security Sales & Integration September 2021 - 79
Security Sales & Integration September 2021 - 80
Security Sales & Integration September 2021 - Cover 3
Security Sales & Integration September 2021 - Cover 4
https://www.nxtbook.com/emerald/securitysales/october_2021
https://www.nxtbook.com/emerald/securitysales/september_2021
https://www.nxtbook.com/emerald/securitysales/august_2021
https://www.nxtbook.com/emerald/securitysales/july_2021
https://www.nxtbook.com/emerald/securitysales/june_2021
https://www.nxtbook.com/emerald/securitysales/may_2021
https://www.nxtbook.com/emerald/securitysales/apr_2021
https://www.nxtbookmedia.com