Assuming that you do not exceed the psi rating of the components (typically 175psi) on any given floor, why worry about the pressure at each floor? If you do exceed 175psi, the use of a pressure reducing valve at the ground level would be a better choice for controlling your pressures. Changing the k-factors would only limit your starting head pressures, the pressure available on each floor would still remain the same.
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: ftmala...@waynefire.com "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 ! -----Original Message----- From: sprinklerforum-boun...@lists.firesprinkler.org [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Reza Esmaeili Sent: Tuesday, August 13, 2013 3:34 PM To: sprinklerforum@lists.firesprinkler.org Subject: Different K factor in each floor practical? Hi! For a 6 floor business office building considered as light hazard occupancy, and the minimum sprinkler discharge density 0.1 gpm/ft2, that the fire pump is located in the basement, in order to adjust flow rate of sprinklers not to be very high at each floor, what strategy is usually considered? Is it common to use different K factor sprinklers in each floor? like the below: Lets say the pump is 30Gpm at 70Psi and consider the below: - Pressure at 1st floor= 60 psi ---- I choose a sprinkler with K=2.8 to have Q=21.7Gpm - Pressure at 2nd floor= 50 psi ---- I choose a sprinkler with K=4.2 to have Q=29.7Gpm - Pressure at 3rd floor= 40 psi ---- I choose a sprinkler with K=4.2 to have Q=26.7Gpm - Pressure at 4th floor= 30 psi ---- I choose a sprinkler with K=4.2 to have Q=23Gpm - Pressure at 5th floor= 20 psi ---- I choose a sprinkler with K=5.6 to have Q=25Gpm - Pressure at 6th floor= 10 psi ---- I choose a sprinkler with K=8 to have Q=25.3Gpm The above numbers are theoretical, I just would like to know if it is common to change the K factor at each floor to adjust flow rate? Or may be a pressure regulated valve is better to use at each floor instead of different K factor? Ps. I have considered to use quick response sprinklers. Thanks! Reza www.sarian.ir ________________________________ From: "bver...@comcast.net" <bver...@comcast.net> To: sprinklerforum@lists.firesprinkler.org Sent: Tuesday, August 13, 2013 5:24 AM Subject: Re: Sleep on it! Do they stock those foam "dorm" quality mattresses? How many and how stored? I think a lot of places don't. If they do, they ignite easy, and burn fast and hot. Burn a single one on edge. The fire is essentially over in a minute, with just a small residual flame from remnant puddle. Temporarily solidified petrochemicals. bv ----- Original Message ----- From: "Charles Thurston" <charl...@mbfsg.com> To: "Vince Sabolik" <sprinklerforum@lists.firesprinkler.org> Sent: Monday, August 12, 2013 3:07:02 PM Subject: Re: Sleep on it! Hello Vince, Just did one a few months back in a strip center. I will try to remember when I get to the office tomorrow and see what it was. Monday, August 12, 2013, 5:58:24 PM, you wrote: > Hey forum -- > Has anyone done a design for a small retail mattress store? > Would Class III, Group A really apply? Not really storage... > Thanks! > Vince Sabolik, West Tech Fire Protection, Inc. > 11351 Pearl Road / Strongsville, Ohio 44136 440 > 238-4800 Fax 440 238-4876 > ____________________________________________________________________ > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org -- Best regards, Charles mailto:charl...@mbfsg.com _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
