American Fire Sprinkler Association [http://www.firesprinkler.org/] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
AFSA Technical Update ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A newsletter dealing with codes and other technical issues August 16, 2013 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Noncombustible Canopies with Wood Ceilings "The facility is an event hall with non-combustible construction internal and outer face construction flat roof pedestrian entrance canopies. The first canopy is roughly 202 sq. ft. and the second is roughly 315 sq. ft. The canopy structure is wrapped in 5/8 in. gypsum board. However a decorative cedar Tongue and Groove finish is attached to the 5/8 in. gypsum board wrapped steel stud canopies. Is sprinkler protection required underneath these pedestrian canopies given that the surface of the canopy is combustible and not structural?" We have reviewed NFPA 13, 2013 edition as the applicable standard. Our informal interpretation is that sprinkler protection beneath the canopy should not be required. How to address a noncombustible projection with combustible exterior finish is not directly addressed. The text of 8.15.7.3 implies sprinklers are required beneath it but that is a more conservative requirement due to the canopy being of combustible construction. The issue at hand is the risk presented by a construction feature. As discussed in 8.15.1.2.18, we are allowed completely combustible exterior assemblies without sprinkler protection when it is limited to 4 ft wide and divided into multiple 160 cu. ft. spaces (which can have up to 480 sq. ft. of combustible surface per space). The main feature though is while having separated but unlimited amounts of combustible (which can burn vigorously due to the enclosed vertical combustible components interfacing with horizontal ones); it is separated from the interior of the building. As such it does not pose a significant threat and the cost/benefit does not merit providing protection within or below the assembly. The noncombustible exterior canopy in question has no more than 315 sq. ft. of combustible surface material that is only horizontal (will not burn as vigorously as the soffits and decorative elements assembly) and it's separated from the building interior with noncombustible construction. Thus, it presents if anything less risk and merits the same basis for not providing sprinklers beneath it. NFPA 13 is constantly expanding the areas where sprinklers can be omitted but it is not possible for it to explicitly identify all locations that merit it. As such, it is reasonable to apply the underlying basis for identified allowances to other construction arrangements. Since it is not explicitly stated, though, concurrence by the AHJ is necessary. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ US Experience with Sprinklers Report: NFPA's "U.S. Experience with Sprinklers" Author: John R. Hall, Jr. Issued: June 2013 Includes statistics on how often sprinklers are reported in fires, by property use, and their estimated impact in reducing the average loss of life and property per fire. Includes statistics on performance, usage and reliability of sprinklers, as well as leading reasons when system fail to operate or operate but are ineffective. Also includes special study statistics on non-fire sprinkler activations. Full Report [http://www.nfpa.org/research/statistical-reports/fire-protection-systems/us-experience-with-sprinklers] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ firesprinkler.org [http://r20.rs6.net/tn.jsp?e=001MSCe5B9frDXDie-Dv0ihwg7GkBL5_yJfW5D1KZlo_d_qPRpuNwWn4yCSDU3gTiljgrpPvu9z3ROagiUU2gg3RwYAVmmrgVU1JMl5cLjwGja1q2QLZdEx52_DbzBwLoFP] 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. 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 2012, American Fire Sprinkler Association. All Rights Reserved ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ PDF Version PDF Link [http://r20.rs6.net/tn.jsp?e=001MSCe5B9frDVuQ2lnT33pl2ATM1qScOl_9N5MdWciTl6m5rey5A0x8aDBgIVfVDPIXPVb7im5xKvqv3-N8TViiHPb1Tix_MJMAyMfQXgss9sfWGmp-Kq2nKasuv_i11nccYluDQ_vnsbjaq0pHIV8nvf7rFsQHIC4ZD0ETzscpzH5-b93-LpRNgTDiAWoh7HGnrFmgksYoqM=] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Training Calendar AFSA Beginning Fire Sprinkler System Planning School Oct. 28 - Nov. 8, 2013 Check our calendar to view upcoming training. 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