of Sprinklers in the design are = 9 Sprinklers Spacing between the branch (L) = 12.5 ft.Īrea of Coverage = S x L Area of Coverage = 10 x 12.5 Area of Coverage = 125 Sq. Spacing between the Sprinkler (S) = 10 ft. Applying the 28% reduction in area 100% - 28% = 72% Therefore, 1500 Sq ft. Maximum ceiling height There are no Protected ceiling pockets as allowed by 8.6.7 and 8.8.7 exceeding 32 sq. Wet Pipe System Light Hazard or Ordinary hazard Occupancy 20 ft. “Area of Operation shall be permitted to be reduced withtout revising the density as indicated in the below figure when all of the following conditions are satified. Density = 0.15 gpm/sq ft.Ĭheck for Area Adjustment : Quick response sprinklers (in light hazard or ordinary hazard with wet pipe system, reduce design area based on maximum ceiling height, where it is less than 20 ft) -NFPA 13,2013,11.2.3.2.3 excerpt, MITI Consultancy Select a Design approach Using Density/Area Curve (NFPA 13, Chapter 11, Fig 11.2.3.1.1)Īs per above figure, Area of operation = 1500 Sq. This is going to be the Pressure Sprinkler -1 Minimum flow per sprinkler: 125 ft2 x 0.15 gpm/ft2 = 18.8 gpm Minimum pressure for 18.8 gpm:.Each sprinkler is required to deliver a density of 0.15 gpm/ft 2.Each sprinkler covers an area of 125 ft 2.Standard Quick response Sprinkler with K-5.6Īrea of operation have been reduced in accordance with cl. Step: 9 : Hydraulic Calculation Isometric View Piping arragment is as shown below,ġ0 ft. apart on the branch lines and 12.5 between branch lines. Step:6,7 & 8 : Arrangement of Piping with attachments Sprinkler are 10 ft. Step:5 : Type of Sprinkler Standard Spray Quick response upright sprinkler with K factor of 5.6 Step:4 : Select the Type of System Wet Pipe System Step:3 : Analyze water Supply Based on the Fire Flow test Conducted on Public water mains in accordance with NFPA 291 Step:2 : Analyzed Structure Assuming Completed Step:1 : Define Hazard In accordance with NFPA 13,2013- chapter Chapter 5 & Appendix A 5.3.1 Electronic factory is classified as Ordinary Hazard Group -1 Occupancy 11.ĭefine the Hazard Analyze the Structure Analyze the Water Supply Select the Type of System Select the Sprinkler Type(s) and Locate Them Arrange the Piping Arrange Hangers and Bracing (where needed) Include System Attachments Hydraulic Calculations Identify hazard category Determine sprinkler spacing Determine piping arrangement Calculate amount of water needed per sprinkler Calculate number and location of open sprinklers in the hydraulically most demanding area Start at most remote sprinkler and work towards the water supply calculating flows and pressures Compare demand with supply Notes and Details for Plans As-Built DrawingsĮxample Project : A Electronic Storage Warehouse Prepared by: Mehboob Shaikh B.E(ME) || CFPS || CFI-1 || AMIE Fire sprinkler design step by step manual#GUIDE FOR HYRAULIC CALCULATION OF SPRINKLER SYSTEM MANUAL WORKSHEET METHOD + WITH ELITE SOFTWARE STEP BY STEP PROCEDURE
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