11/13/2022 0 Comments Nfpa 13 baffle![]() ![]() Fire modeling has shown that when the openings are too large, heat will collect above the cloud ceiling. The intent of this provision is to ensure the openings along a wall or between clouds are not too large. The key takeaway from this section is that sprinklers can be omitted above cloud ceilings where four conditions are met.įirst, the combined total area of the openings around the cloud are less than or equal to 20 percent of the area of the ceiling, construction feature, or plane used to determine the boundaries of the compartment. Cloud ceilings are now addressed in Subsection 9.2.7 of the 2019 edition, which provides the specific installation requirements for cloud ceiling applications. Cloud ceilings are now defined as any ceiling system, not including sloped ceilings, installed in the same plane with horizontal openings to the structure above on all sides. The first question many have is whether NFPA 13 defines “cloud ceilings.” If referencing the 2016 edition or later, the answer is yes. That means that even if your jurisdiction hasn’t adopted the latest and greatest, and the situation you are dealing with is addressed in a more recent edition, be sure to discuss options with your authority having jurisdiction (AHJ). Even so, it is important to be aware of the fact that the most recent edition of the standard reflects the technical committee’s latest intent on the subject. Recently, the department responsible for providing answers to technical questions on NFPA 13, Installation of Sprinkler Systems, received some inquiries regarding the sprinkler requirements for cloud ceilings.Īlthough this subject was newly addressed beginning with the 2016 edition of NFPA 13, many jurisdictions have not yet adopted the most recent editions of the standard. ![]()
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