To my esteemed colleagues: I have an aircraft hangar I am looking at and would like clarification on sprinkler / branchline spacing. I know what I think ;-) However, I would like the combined knowledge of all of you as to the actual requirements of the NFPA standards.
The hangar is a 32,000 suare feet Group-I hanger with a door opening to accomodate a 36 ft tail height. The chosen fire protection scheme is Option-3, a closed-head wet-pipe sprinkler system at .17 gpm / 15,000 square feet and a low-level hi-ex foam system. The building is a metal-purlin building with 25 ft bay spacing. NFPA-409 requires a maximum 130 sf sprinkler spacing with a maximum distance of 12 feet between the sprinklers or the branch-lines. NFPA-409 does not reference NFPA-13 for sprinkler or branch-line spacing. Question: In a building with 25 ft bays would one be allowed to space the branch-lines at 12'-6" as indicated in NFPA-13 for storage bays at 25 feet spacing in lieu of the 12 feet as indicated in NFPA-409? Thanks, Ray Vance - SET Chief Sales Designer Wayne Automatic Fire Sprinklers, Inc. www.waynefire.com<http://www.waynefire.com> 407-877-5563 office 321-436-2184 mobile _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
