ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 34

AMCA 540 and AMCA 550
What is the difference between Miami-Dade NOArequired
Testing Application Standard (TAS) 201,
Impact Test Procedures, impact testing and ANSI/
AMCA Standard 540, Test Method for Louvers
Impacted by Wind Borne Debris, impact testing?
The TAS 201 and ANSI/AMCA Standard 540 test protocols
are alike in that, to simulate windborne debris,
an air-powered cannon is used to fi re a 2-in.-by-4-in.
(5 cm by 10 cm) piece of timber at a louver test specimen
(photos A and B). One key difference, however, makes
the ANSI/AMCA Standard 540 test more stringent: In
addition to an impact test of the longest unsupported
blade span, ANSI/AMCA Standard 540 requires an impact
test of the shortest blade span. Typically, impact tests of
shortest blade spans are much more diffi cult to pass than
impact tests of longest blade spans.
Does Miami-Dade accept both ANSI/AMCA
Standard 540 and ANSI/AMCA Standard 550?
Yes. Per the 2020 Florida Building Code, Building, and
the 2020 Florida Building Code, Mechanical, both test
standards are acceptable to Miami-Dade.
Is a louver that passed ANSI/AMCA Standard
550 watertight? No. Despite ANSI/AMCA Standard 550
being one of the most stringent water-penetration tests a
louver can be subjected to, a louver that receives a passing
grade still could allow the penetration of as much as
2 gal. (8 L) of water over the course of the 70-minute test.
The bottom line: ANSI/AMCA Standard 540 and ANSI/
AMCA Standard 550 have achieved substantial code
and specifi cation penetration. Thus, it is important to
understand how they are applied.
Notices of Acceptance
Is a Miami-Dade NOA acceptable in lieu of
project-specifi c calculations outside of Florida?
Yes, provided:
■
The client will accept drawings with a Florida professional-engineer
stamp.
■
The client will accept drawings based on the Florida
Building Codes.
■
The designed wind load shown on the Miami-Dade
NOA is suffi cient.
What if building condition is not listed in a
Miami-Dade NOA? Only the conditions specifi ed in a
Miami-Dade NOA are approved for Miami-Dade County.
If a condition is not specifi ed, there are two options:
■
If feasible, frame out openings with a substrate material
detailed in the Miami-Dade NOA.
■
A project-specifi c Miami-Dade NOA can be obtained
from Miami-Dade County. The Miami-Dade NOA must
be signed and sealed by an engineer who is a member of
the Florida Board of Professional Engineers. This generally
takes a good deal of time and is somewhat costly.
The bottom line: For a louver to be considered
Miami-Dade NOA-approved, it must be installed per the
PHOTO A. A louver undergoes an ANSI/AMCA
Standard 540 test.
PHOTO B. A louver following an impact test.
34
2021 AMCA inmot ion
www.amca.org
http://www.amca.org

ASHRAE Journal Supplement - AMCA InMotion - November 2021

Table of Contents for the Digital Edition of ASHRAE Journal Supplement - AMCA InMotion - November 2021

Contents
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - BB1
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - BB2
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover1
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover2
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Contents
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 2
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 3
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 4
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 5
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 6
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 7
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 8
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 9
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 10
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 11
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 12
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 13
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 14
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 15
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 16
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 17
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 18
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 19
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 20
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 21
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 22
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 23
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 24
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 25
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 26
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 27
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 28
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 29
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 30
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 31
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 32
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 33
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 34
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 35
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 36
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 37
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 38
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 39
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 40
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 41
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 42
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 43
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 44
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover3
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover4
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