AMERICAN FIRE SPRINKLER ASSOCIATION
9696 Skillman, #300 Dallas, Texas 75243
Ph: (214) 349-5965 Fax: (214) 343-8898
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TECHNICAL UPDATE
DECEMBER 27, 2006
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"WE HAVE 1-1/4" AND 1-1/2" RISER NIPPLES ON A 2-1/2" MAIN THAT ARE
LONGER THAN 3 FT. WHEN PROVIDING SEISMIC PROTECTION, ARE THEY
REQUIRED TO HAVE A FOUR-WAY BRACE?"
We have reviewed NFPA 13, 2002 edition as the applicable standard.
Our informal interpretation is that they are required to have a four-
way brace.
Section 9.3.5.5.1 requires the top of risers to have a four-way
race. This is not just a system riser but ALL risers, as identified
by the definition in chapter 3 (i.e. the vertical supply pipes in a
sprinkler system) and the use of a plural tense in both the base
criteria and the definition. It is also worth mentioning that it does
not apply to sprig-ups since they have their own definition in
chapter 3 (i.e. vertical pipe supplying a single sprinkler) as well
as 9.3.6.5 that requires restraint when sprig-ups are longer than 4
ft. There was additional clarification in the 2002 edition that it is
not necessary to brace short risers (i.e. less than 3 ft).
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Technical Update is prepared by the Technical Services Dept. of the
AFSA: Vice President of Engineering and Technical Services Roland
Huggins, a PE registered in fire protection engineering; Phill Brown,
a NICET IV certified automatic sprinkler technician and NFPA
Certified Fire Protection Specialist (CFPS) and Tom Wellen, a degreed
fire protection engineering technologist. This is provided with the
understanding that the AFSA assumes no liability for this opinion or
actions taken on it and they are not to be considered the official
position of the NFPA or its technical committees.
Copyright (c) 2006, American Fire Sprinkler Association. All Rights
Reserved
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