American Fire Sprinkler Association [http://www.firesprinkler.org/] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
AFSA Technical Update ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A newsletter dealing with codes and other technical issues June 28, 2013 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ NFPA 13R Hose Stream Demand "We are planning a NFPA 13R fire sprinkler system for the sleeping and living quarters of a fire department facility. The site has no public water supply. The system will be supplied by a water tank and electric fire pump. The water demand for the interior system is 90 gpm. NFPA 13 requires 30 minutes water supply duration and 100-gpm hose allowance. Currently there are no fire hydrants planned. Q1) Can this be a viable code complaint system without fire hydrants? Q2) If so, will the 100 gpm hose allowance need to be calculated into the total water supply for sizing the water tank? Q3) Can the water tank be located in the fire pump room inside the building?" We have reviewed NFPA 13R, 2013 edition as the applicable standard as well as NFPA 20. Our informal interpretation is that using NFPA 13R is an unusual design approach for this occupancy and that hose allowances are not included for NFPA 13R designs. A fire sprinkler system provided in a fire station is typically a NFPA 13 design. Using a NFPA 13R approach is unusual. Per our telephone conversation, you indicated that a NFPA 13R system was specified for the living quarters. The living quarters are separated from the adjacent unprotected fire station by a 3-hour rated partition. For the first question, the requirement for an outside fire hydrant depends on the jurisdiction requirements if they have adopted Appendix C of the IFC. Usually, the architect or engineer of record on the project specifies what is to be provided regarding hydrants in the code analysis. In addition, the code analysis should identify if NFPA 1142, Standard on Water Supplies for Suburban and Rural Fire Fighting applies to this facility. Someone should discuss with the AHJ how they intend to have water supplies for exterior fire fighting operations if fire hydrants or other water supplies are not provided. Regarding question 2, the 100-gpm hose allowance is not required to be included for NFPA 13R applications. This is addressed in annex A.7.2 where it indicates that only the intent of NFPA 13R to reference the sprinkler discharge (flow and pressure), number of design sprinklers, and position of sprinklers (distance from walls, ceilings, and other sprinklers) requirements of NFPA 13. Other rules from NFPA 13 such as sprinklering of combustible concealed spaces, hose stream demand, and water supply duration are not intended to be referenced by 7.2. It is also the intent of 7.2 to apply to those systems or portions of systems that are outside the dwelling unit but have been determined to be considered residential or incidental to residential and within the scope of this standard. (Also see A.1.1.) Lastly, the tank for the water supplies can be located within the fire pump room per NFPA 20. The 2013 edition of NFPA 20 says in Section 5.12.1.1.4 that rooms containing fire pumps shall be free from storage and penetrations not essential to the operation of the pump and related components. The annex A.5.12.1.1.4 also says that equipment that increases the fire hazard (such as boilers) and is not related to fire protection systems should not be in a fire pump room. The water storage tank is part of the fire protection system so it can be located inside the fire pump room. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ firesprinkler.org [http://r20.rs6.net/tn.jsp?e=001FY9Og6tHkGgsh645VHess4uyMnxDtCCxt4fpcsPQ3HRXVXo88ANJfHF9YYkRTbvhrUuzFLH0eyiKR_sLa9XHWZ3kdfKcCjjNCIJ6ffTkvVIx2jA56ZBmJ6NcUV8lXAwq] 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=001FY9Og6tHkGgrb3BeEHp9UmzdqWdRWZ5Us29dMWx2ajv2WXVNlhEkZYV8uruhhzr6eGkPeCIvcwLV5ge7P-405_Tc5grP0wAnTdppL4TPnhmRuVcgzAl2MECHRwV4vzH9C-J9NbNgCKGz73QUsNGQi3ybAcaFHnGAtC_6Hsa4V4iySUCrKACHUy4cAbsPqGs_-qZfP7kxNU0=] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Training Calendar AFSA Beginning Fire Sprinkler System Planning School July 29 - August 9, 2013 Check our calendar to view upcoming training. 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