ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 34
Selecting Ceiling
Radiation Dampers
Examining the role of fl oor/ceiling- or roof/ceiling-assembly design
and construction in proper ceiling-radiation-damper application.
BY MICHAEL J. BULZOMI, AMCA INTERNATIONAL
FIRE AND SMOKE DAMPER SUBCOMMITTEE
Editor's note: The following is adapted from the white
paper " Ceiling Dampers Explained " 1 by the AMCA
International Damper Engineering Committee, available
at https://bit.ly/AMCA_Papers.
C
eiling dampers, wood-truss ceiling dampers,
ceiling fi re dampers, fi restop fl aps-ceiling
radiation dampers go by many names but serve one
very important purpose: limit the transfer of heat
through HVAC penetrations in ceiling membranes
(most commonly, fi re-rated acoustical ceiling tile or
gypsum board) protecting the structural members
of a fi re-resistance-rated fl oor/ceiling or roof/ceiling
assembly in the event of a fi re (Figure 1). Selecting
the proper ceiling radiation damper-even understanding
if a ceiling radiation damper is applicable-
for a given application can be confusing.
This article will explain how to determine
the correct ceiling radiation damper based
on the assembly used in construction.
ANSI/UL 263 and UL's Fire
Resistance Directory
The process of selecting a ceiling radiation
damper depends largely on the design of
the fl oor/ceiling or roof/ceiling assembly in
34
2023 AMCA inmot ion
which the ceiling radiation damper will be installed.
ANSI/UL 263, Fire Tests of Building Construction and
Materials2, defi nes test criteria used to evaluate entire
fl oor/ceiling and roof/ceiling assemblies, as opposed
to components of assemblies. If a fl oor/ceiling or roof/
ceiling assembly meets the test criteria, it receives
a fi re-resistance rating expressed in terms of hours,
and its design specifi cations are added to UL's Fire
Resistance Directory (Product iQ).
Floor/ceiling and roof/ceiling assemblies requiring
membrane protection can be tested to ANSI/UL 263
any of three ways:
■
Without ceiling radiation dampers-Installation
of ceiling radiation dampers in assemblies tested
without HVAC penetrations through their ceiling
membranes is prohibited. If the use of ceiling radiation
dampers is not called out in the construction
details of an assembly in the Fire Resistance
Directory, the design should not be specifi ed for
Flooring
System
Structural Member
2 x 6
Ceiling Damper
Ceiling Membranes
FIGURE 1. Example fi re-rated fl oor/ceiling assembly.
Source: AMCA International white paper " Ceiling Dampers Explained " 1
www.amca.org
https://bit.ly/AMCA_Papers
http://www.amca.org
ASHRAE Journal Supplement - AMCA InMotion - November 2023
Table of Contents for the Digital Edition of ASHRAE Journal Supplement - AMCA InMotion - November 2023
Contents
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - BB1
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - BB2
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - Cover1
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - Cover2
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - Contents
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 2
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 3
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 4
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 5
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 6
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 7
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 8
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 9
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 10
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 11
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 12
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 13
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 14
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 15
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 16
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 17
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 18
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 19
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 20
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 21
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 22
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 23
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 24
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 25
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 26
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 27
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 28
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 29
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 30
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 31
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 32
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 33
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 34
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 35
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - 36
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - Cover3
ASHRAE Journal Supplement - AMCA InMotion - November 2023 - Cover4
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