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USACE / NAVFAC / AFCESA
UFGS-13956N (September 1999)
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Preparing Activity: NAVFAC
Replacing without revision
NFGS of same number and date
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated 23 June 2005
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SECTION 13956N
FOAM FIRE EXTINGUISHING FOR AIRCRAFT HANGARS
09/99
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NOTE: This guide specification covers the
requirements for automatic deluge, and pre-action
fire extinguishing foam systems for aircraft hangars.
Comments and suggestions on this guide specification
are welcome and should be directed to the technical
proponent of the specification. A listing of
technical proponents, including their organization
designation and telephone number, is on the Internet.
Recommended changes to a UFGS should be submitted as
a Criteria Change Request (CCR).
Use of electronic communication is encouraged.
Brackets are used in the text to indicate designer
choices or locations where text must be supplied by
the designer.
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NOTE: For fuel tank farm protection use Section
13957N FOAM FIRE EXTINGUISHING FOR FUEL TANK
PROTECTION. For hazardous and flammable handling and
storage facilities such as truck or rail
loading/unloading racks, hazardous/flammable liquid
warehouses, fuel pump houses and laboratories, use
Section 13958N FOAM FIRE EXTINGUISHING FOR HAZ/FLAM
MATERIAL FACILITY. Choose the type of system most
appropriate for the hazard. Deluge systems are
primarily intended for fire protection of aircraft
hangar facilities. Pre-action systems may be
required for Air Force hangars even though NFPA 409
recommends deluge systems for aircraft hangars.
Consult the current edition of AFR 88-15, "Criteria
and Standards for Air Force Construction" for Air
Force projects. Pre-action systems provide added
safety against accidental discharge by requiring
both actuation of a detector and fusing of a
sprinkler head before foam discharge will occur.
Deluge systems provide the fastest fire
SECTION 13956N
Page 4
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