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American Fire Sprinkler Association [http://www.firesprinkler.org/] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ AFSA Technical Update ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A newsletter dealing with codes and other technical issues October 18, 2012 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Vehicle Impact Protection of Risers "The sprinkler system riser is a single wet pipe system with a backflow prevention device in a vertical stacked position. The riser is located along the exterior wall in a pallet-manufacturing warehouse. There is minimal forklift truck traffic around the area of the riser. We proposed a 2-inch pipe rack system around the sprinkler riser, supported by connections to the concrete floor and concrete block walls with flanges and concrete anchors. NFPA 13 does not specifically indicate the method or methods for protecting sprinkler systems from mechanical damage. They do indicate the use of steel posts, concrete barriers or other approved means. The IFC in Section 312 "Vehicle Impact Protection" provides direction for the design of "guard posts", however not specifically stated for protection for sprinkler system risers. Must the method of protection for sprinkler systems risers meet the requirements of IFC Section 312?" We have reviewed NFPA 13, 2010 edition and the 2012 editions of the IFC and IBC that you indicated as the applicable codes and standard. Our informal interpretation is that vehicle impact protection is not required for fire sprinkler risers. The requirement in the IFC in Section 312.1 is the vehicle impact protection required by this code shall be provided by posts that comply with Section 312.2 or by other approved physical barriers that comply with Section 312.3. Section 312 is not in effect unless there are other sections of the code specifying where vehicle impact protection is required. The locations for fire related equipment is Section 912.3.3 where fire department connections are subject to impact by a motor vehicle, vehicle impact protection shall be provided in accordance with Section 312. The IBC has similar wording in Section 912.3.3. Fire hydrants in Section 507.5.6 of the IFC also require physical protection where fire hydrants are subject to impact by a motor vehicle, guard posts or other approved means shall comply with Section 312. There are no other requirements for the sprinkler system risers. With that said, fire department connections can be located at the fire sprinkler riser where impact protection would be required from vehicle impact. The IFC also indicates impact protection for above-ground tanks in 2306.4, LP-gas storage containers in 2307.5.3, vaults in 5303.16.6 and 5704.2.8.6, above-ground tanks, piping, electrical conduit or dispensers in 5704.2.9.7.5. This shows that Section 312 for vehicle impact protection is not a blanket requirement to protect every item from vehicle impacts. The IFC does have requirements in Section 901.4.6 for the pump and riser room size to allow clearances for equipment installation, maintenance, and unobstructed passage. As you noted in your question above, the NFPA 13 requirement in Section 8.16.5 is that sprinkler risers subject to mechanical damage shall be protected by steel posts, concrete barriers, or other approved means where no details are specified by NFPA 13. As such, the conditions surrounding the sprinkler riser should dictate the type of protection needed for the sprinkler riser. If the riser is subject to an impact from a forklift truck, protection for such an event should be provided. The protection that you proposed seems to be reasonable approach for this application. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ firesprinkler.org [http://r20.rs6.net/tn.jsp?e=001dy15CyHIuBSMvE4mStDE9wgQIWMHszoxmrGxOEaDU-Fi7l2tQ8CLGiAo1vTf4elxHEWeSAR-pjFlzETy0OXlLfQ6MWdiFDEYt_4joYW_QS7ll54GhXaDGA==] 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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