guide to aircraft hangar classifications
TRANSCRIPT
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Guide to Hangar Classifications
Provided by:
www.TheCodeCoach.com
*as defined in NFPA 409, Standard on Aircraft Hangars
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Group I - II - III - IV
Hangars are classified by groups:
Groups I through III are classified by fire area and door height.
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Fire Area
“...an area of a building separated from the
remainder of the building by construction
having a fire resistance of at least 1 hour…”
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Fire Area
1 H
r. F
ire
Rat
ed
Fire Area 1 Fire Area 2
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Group I Hangar
> 40,000 sq. ft.-or-
> 28’
door height greater
than 28’
single fire area greater than 40,000 sq. ft.
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Group I Hangar-or-
ability to house aircraft with a tail height of over 28’
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Group II Hangar
< 28’
< 40,000 sq. ft.
-and-
-per- Table 4.1.2
door height of 28’ or
less
single fire area as outlined in NFPA 409, Table 4.1.2, based on construction type
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Group II Hangar
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Hangar Classification - Group III
< 28’ -and-
< 30,000 sq. ft.
-per- Table 4.1.3
door height of 28’ or
less
single fire area as outlined in NFPA 409, Table 4.1.3, based on construction type
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Group III Hangar
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Group IV Hangar
membrane covered, rigid steel frame
structures
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What do you need to know about aircraft hangars?
● understand and identify the protection, construction, and
maintenance requirements for aircraft hangars
● practically apply the requirements of NFPA 409
● implement a plan of action to ensure compliance with the
standard
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This guide includes all checklists, tools, resources, and training guides required for NFPA 409 compliance.