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American Fire Sprinkler Association [http://www.firesprinkler.org/] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ AFSA Technical Update ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A newsletter dealing with codes and other technical issues July 11, 2012 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Sprinkler Protection for Interior Cloth Canopies "We have some aesthetic canopies in a chain grocery store that are 3 ft wide and 4 ft in depth. The canopy surrounds a lowered ceiling area with sprinkler protection above at the roof deck level. The canopies protrude down from the lower ceiling by 17 inches in one scenario and 7 inches in the other scenario. Are sprinklers required under the canopies?" We have reviewed NFPA 13, 2010 edition as the applicable standard. Our informal interpretation is that sprinklers are not required under the canopies. Section 8.15.7 addresses canopies but that is for "exterior" canopies on a building. The standard does not address interior canopies but the application is more suited for obstruction rules. Section 8.5.5.3.1 indicates that sprinklers shall be installed under fixed obstructions over 4 ft wide such as ducts, decks, open grate flooring, cutting tables, and overhead doors. Sprinklers are not required under the canopy since it is less than 4 ft wide. The fabric that is provided in the awning may melt or burn away when the fire plume occurs directly below it. The fabric will then allow the fire plume to escape whereby damage to the structure may be limited. Since the heat plume is lost, it would seem to be difficult to activate sprinklers under the awning. As such, it seems reasonable to space the sprinklers to the area of the permanent ceiling and ignore the area under the canopy for combustible fabrics. The upper ceiling sprinklers will address the burning canopy. For fabrics that do not melt or burn away, the sprinklers can be spaced to the outer edge of the canopy observing the ceiling pocket rules and sprinkler obstruction rules such as the "Beam Rule" in Table 8.6.5.1.2 as an example. The application of sprinklers is questionable when fabric ceilings are involved and is beyond the scope of NFPA 13. Thus, the issue should be brought to the attention of the engineer on record for the project for direction or discuss this with the AHJ. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ firesprinkler.org [http://r20.rs6.net/tn.jsp?e=001fTnOpEmAU5pWXXnNmimxdxpbGSWZE152ZW8L_hrjnv2ais9d5gih7ODQDH387xmbIYELAlnQwCk_xIccdKoXIFbswE10iWu5bgHDc0lkdiflNYfGmN0AsA==] Hosted by the American Fire Sprinkler Association ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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 PE registered in fire protection engineering. 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