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Jackson Reyes
Jackson Reyes

NFPA 14 2010.pdf: The Essential Standard for Firefighters and Building Owners


this version of the handbook is not intended to replace the nfpa 20 and nfpa 14 handbooks. the handbook contains the current information available from the nfpa and it cannot be assumed that all the information found in the pdf in this handbook will appear in the printed handbooks.




Nfpa 14 2010.pdf



this edition of the handbook is updated for 2010 and contains a summary of technical changes for nfpa 20 and nfpa 14, and a complete reference to the manual for installation of stationary fire protection systems. the new version of the handbook is intended for use by the reader who already has some facility with the manual for installation of stationary fire protection systems. readers who are new to the handbook may still download a pdf copy to use as a reference.


this involves adding the specified figure to the previous figure. the numbers in nfpa 13 table 11.2.3.1.1 are precombustion (or prereheat). for a man-made fire, the prereheat total corresponds with the number of square feet of combustible material that can potentially result in fire spread. for natural fire, the preheat total corresponds to the total area of the combustible in the fire. the nfpa 13 table 11.1 numbers are just that, figures, and not actual computations. the actual area will vary based on the hazard (i.e., size and complexity of the combustible), as well as the location of the fire. the area calculations are included in the hazard determination section of the document. there is no need for a calculator for this part of the process.


look at the amount of water necessary to cover the area found in nfpa 13 figure 11.2.3.1.5. divide the figure by the flood rate in figure 11.6 (see figure 2), and your total demand for operating sprinkler systems is the result. with a 50 percent probability of fire and a 0.5 probability of fire spread, nfpa 13 table 11.1 and the figures in figures 3 and 4 indicate that the sprinkler system may require 1,500-square-foot of water. once you determine the amount of operating water, the next step is to use the volume of water in nfpa 13 figure 1.2 to determine the volume of water needed to refill the 1,500-square-foot area found in nfpa 13 figure 11. the figure in nfpa 13 figure 1.2 is not a volume to be used for sprinkler system demand alone. any water used to refill the area must also be added to the refill times in figure 11. that being the case, the total volume of water required for a 50 percent probability of fire must be found by the equation described in nfpa 13 table 11.


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