ESFR and CMSA sprinklers need to collect all the heat they can to activate the appropriate amount sprinklers thus, if the smoke and heat removal system were activated it could actually have a detrimental effect on the sprinkler system.
s) 1/ 2 or less that are listed to control a fire in stored commodities with 12 or fewer sprinklers. The purpose of being able to omit smoke and heat removal systems is because of the effect they could have on ESFR sprinklers and CMSA sprinklers with an RTI of 50 (m This allowance is also extended to Group S-1 occupancies with an area exceeding 50,000 ft 2 of undivided space. This is also stated in Section 910.2 Exceptions 2 and 3. Note j is used in reference to the requirement of smoke and heat removal systems for Class I-IV commodities when the storage area exceeds 12,000 ft 2 and 2,501-12,000 ft 2 without public access and high-hazard commodities when the storage area exceeds 500 ft 2. s) 1/ 2 or less that are listed to control a fire in the stored commodities with 12 or fewer sprinklers, installed in accordance with NFPA 13.”. “Not required where storage areas are protected by either early suppression fast response (ESFR) sprinkler systems or control mode special application sprinklers with a response time index of 50 (m This same reasoning is stated in Section 907.4.3.1 of the IFC but it is referring to a different issue. This is allowed because an automatic fire-extinguishing system is not required for this storage method, so the automatic fire-extinguishing system would be acting as the fire-detection system. Note i is used in reference to the requirement of fire detection for Class I-IV commodities when the storage area is 501-2,000 ft 2 with public access. “Not required where an automatic fire-extinguishing system is designed and installed to protect the high-piled storage area in accordance with Sections 32.” What is commonly overlooked when reviewing the requirements of this table are Notes i and j. (See Figure 1 on page 27.) The commodity classification and size of the high-pile storage area being protected will determine what protection methods are required. This also repeated in Section 11.1.2 of NFPA 13.įrom here, Table 3206.2, General Fire Protection and Life Safety Requirements from the IFC can be reviewed to determine whether an automatic fire-extinguishing system, fire detection system, and/or smoke and heat removal is required. “(2) The requirements of 12.3(1) shall not apply where the areas are separated by a draft curtain or barrier located above an aisle, horizontally a minimum of 2 ft (600 mm) from the adjacent hazard on each side, or a partition that is capable of delaying heat from a fire in one area from fusing sprinklers in the adjacent area.” “(1) Where areas are not physically separated by a barrier or partition capable of delaying heat from a fire in one area from fusing sprinklers in the adjacent area, the required sprinkler protection for the more demanding design basis shall extend 15 ft (4.6 m) beyond its perimeter. “For buildings with two or more adjacent hazards or design methods, the following shall apply: The reference to requiring the automatic sprinkler design density extending to either 15 ft beyond the high-pile storage area or to a permanent partition is the same requirement in Section 12.3 of the 2016 edition of NFPA 13, which states: Rm fire sprinkler design code#
Washington, D.C.: International Code Council. Excerpted from the 2015 International Fire Code Copyright 2014. Where portions of high-piled storage areas have different fire protection requirements because of commodity, method of storage or storage height, the fire protection features required by Table 3206.2 within this area shall be based on the most restrictive design requirements.” “Where required by Table 3206.2, fire detection systems, smoke and heat removal, and automatic sprinkler design densities shall extend the lesser of 15 ft (4572 mm) beyond the high-piled storage area or to a permanent partition. The first time the IFC references the interaction between smoke and heat vents or a mechanical smoke removal systems and sprinklers is in Section 3206.2, which states: The International Building Code (IBC), 2015 edition in Section 413.1 requires all high-pile or rack storage in any occupancy to comply with the requirements in the International Fire Code (IFC), which are located in Chapter 32, High-Piled Combustible Storage. This article will discuss conditions where smoke and heat vents or mechanical smoke removal systems could potentially be installed along with sprinklers and the issues that might arise. When protecting storage occupancies there are several issues that can impact the selected protection methods.
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