American Fire Sprinkler Association
12750 Merit Drive - Suite 350 - Dallas, Texas 75251
Ph: (214) 349-5965 Fax: (214) 276-0908
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TECH TALK
DECEMBER 2008
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Exterior Walkways with Type V Construction Sprinkler Criteria
A hotel of type V construction is under construction and being
protected per NFPA 13R. The exterior walkways require sprinkler
protection by a local requirement. A residential dry sidewall does not
exist. What design criteria would this walkway fall under? Sprinkler
protection is not required by NFPA 13R but may be required by the
building code. The IBC Section [F] 903.3.1.2.1 goes outside the
dwelling unit for balconies, patios and decks and indicates sprinkler
protection shall be provided for exterior balconies where the building
is of Type V construction. Sidewall sprinklers that are used to
protect such areas shall be permitted to be located such that their
deflectors are within 1 inch to 6 inches below the structural members,
and a maximum distance of 14 inches below the deck of the exterior
balconies that are constructed of open wood joist construction.
Section 903.3.2 requires the use of residential or quick response
sprinklers in dwelling units and sleeping units in Group R and light-
hazard occupancies as defined in NFPA 13. The criteria is intended to
ensure that within the dwelling unit a fast response sprinkler is
used, which is now unnecessary since it is required by NFPA 13 and
13R. Additionally it╒s not intended to delete the allowance to use
the residential sprinkler criteria identified in NFPA 13 and 13R.
The bottom line is that the hydraulic design criteria for the
balconies will be per NFPA 13R. The main question is do we apply the
criteria for ╥within╙ or ╥outside╙ the dwelling unit. Although,
NFPA 13R does not provide guidance for exterior, open corridors or
balconies, garages are addressed. This, plus NFPA 13 criteria on
corridors, shows us that it is appropriate to treat balconies as being
╥within╙ the dwelling unit. It would be reasonable to use the
protection requirement of 6.8.3.3 for garages. NFPA 13R allows garages
to be sprinklered with quick-response sprinklers designed to provide a
density of 0.05 gpm/ft2 over the area of the garage or 7 psi (which
ever is greater), but not to exceed four sprinklers. The area would
not be applicable in this case, but the four sprinklers flowing would
be applied.
NFPA 14 2007 EDITION HOSE LENGTH
Sentence Correction from the November 2008 Tech Talk:
╥If the travel distances for sprinklered (150 ft spacing) and
nonsprinklered (200 ft) areas are exceeded, additional hose
connections are required.╙ The distances are reversed and should
read: ╥If the travel distances for sprinklered (200 ft spacing) and
non sprinklered (150 ft) areas are exceeded, additional hose
connections are required.╙
We apologize for the error.
AFSA Technical Services Staff
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TechTalk is prepared by the Technical Services Department of the
American Fire Sprinkler Association: Vice President of Engineering and
Technical Services, Roland Huggins, a PE registered in fire protection
engineering; Phill Brown, a CFPS and a NICET IV certified automatic
sprinkler technician, and Tom Wellen, a degreed fire protection-
engineering technologist. Opinions are provided with the
understanding that AFSA assumes no liability for the opinions or
actions taken on them and they are not to be considered the official
interpretation of the NFPA or that of its technical committees.
Copyright (c) 2008, American Fire Sprinkler Association, 12750 Merit
Drive, Ste 350, Dallas, TX 75251. Voice (214) 349-5965 ext 124 or
Fax (214) 276-0908. All rights reserved.
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