Based on what I have always been taught, you design to the worst case being the most remote area. What happens in other areas that flow more is not the issue. Use the same K factor sprinkler for the areas. What you can do is reduce the pipe sizes of mains on the lower floors in order to increase pressure drop through the piping, which if memory serves, will reduce flow from the lower floor heads.
Richard On Tue, Aug 13, 2013 at 9:42 PM, Reza Esmaeili <[email protected]>wrote: > > > Hello Eric, > My reason for using different K factors in each floor is to reduce the > flow rate to around required flow rates to minimize the size of pump and > fire tank, is this way practical? > If I use the same K factor sprinkler in 1st floor and 6th floor, I have > very big flow rate in 1st floor and I have to consider a big pump and a big > water tank. > Thanks, > Reza > Www.sarian.ir > > > ------------------------------ > On Wed, Aug 14, 2013 12:39 AM IRDT Eric Tysinger wrote: > > >Also to add, given a 6-story building with a basement you should be > looking at about 70ft of elevation difference between the basement and the > roof. If a pressure reducing valve was used and you limited the pressure to > 165psi at the basement level you would should still have at least 125-135 > psi available at the roof. > > > >Eric Tysinger CET > >NICET III - 108988 > >Project Manager - Fort Myers Branch > >Wayne Automatic Fire Sprinklers, Inc. > >4683 Laredo Ave. > >Fort Myers, Florida 33905 > >p: (239)433-3030 x1240 f: (239)433-3263 > >C: (239)633-9703 > > > >For Fire Alarm Service and Monitoring questions contact us at: > >[email protected] > > > >"Ask us how we can eliminate your Fire Alarm phone line bills" > >"Ask us about CCTV, Access Control and Security" > > > >Thank you, and have a great day ! > > > > _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
