i.e., if your calc program doesn't give you the option for an end head pressure and forces you to continue to think in area/density (and DOS?), use a density derived from spacing and density to equal the minimum end head pressure needed. Let's say its K=25.2 end head pres of 25, and 100 sf spacing. You know you need to come up with a discharge of 126 GPM from the sq rt of 25 x K factor = Q. So then divide 126 GPM by the 100 sf spacing and you need to lie to it and tell it to provide a 1.26 density. If it were 80 SF spacing, it's be 1.575. Make sure if its interactive (with autoCAD 3?) then if you change spacing, verify the density and flow didn't change automatically.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Tuesday, November 17, 2009 4:57 PM To: [email protected] Subject: RE: ESFR Heads in Calc's If you're applying that table then in your calcs you need to specify the minimum end head pressure as 25 psi, you already know the K-factor the for the heads. The design area is based on 16.2.3.4. Craig L. Prahl, CET Fire Protection Specialist Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [email protected] http://www.ch2m.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Brian Harris Sent: Tuesday, November 17, 2009 4:41 PM To: [email protected] Subject: ESFR Heads in Calc's Forum, I don't have allot of experience dealing with ESFR heads and am doing some calc's for a warehouse we are designing. The question I have is where do I get the density for these heads to plug into the calc's. For this particular job I am using Table 16.2.3.1 on page 150 (07 edition) Max. storage = 25 ft'., max. ceiling = 40 ft'. I'm using a Viking VK510 (k25.2) head. Any help would be greatly appreciated. Regards, _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
