1" to the drops should do you fine regardless of where it is in the schedule. Don't forget full 1500 sq.ft. calc.
Chris Cahill, P.E. Fire Protection Engineer Sentry Fire Protection, Inc. 763-658-4483 763-658-4921 fax Email: [email protected] Mail: P.O. Box 69 Waverly, MN 55390 Location: 4439 Hwy 12 SW Waverly, MN 55390 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ralphy Henderson Sent: Monday, November 02, 2009 12:20 PM To: [email protected] Subject: Re: Omitting sprinklers (13 - 22.4.4.6.2) No takers?? --- On Fri, 10/30/09, Ralphy Henderson <[email protected]> wrote: From: Ralphy Henderson <[email protected]> Subject: Omitting sprinklers (13 - 22.4.4.6.2) To: [email protected] Date: Friday, October 30, 2009, 5:55 PM NFPA #13 22.4.4.6.2. allows ommitting sprinklers from the calcs in certain circumstances with the understanding that those sprinklers ommitted will still need to be able to discharge at the minimum density. Does this mean that I can omit sprinklers in the calc then just make sure the armover and branchline sizes established by the calcs are maintained in sizing that particular sprinklers piping? So if I establish pipe sizes as 1", 1", 1 1/4", 1 1/2" to each sprinkler on the line I just make sure to not forget to include the head in the closet as part of the overall sizing scheme? Or...???? Thanks, RB For reference: 22.4.4.6.2 The requirements of 22.4.4.6.1 to include every sprinkler in the design area to be included in the system discharge shall not apply where the area of application is equal to or greater than the minimum allowable area of Figure 11.2.3.1.1 for the appropriate hazard classification (including a 30 percent increase for dry pipe systems). Sprinkler discharge in closets, washrooms, and similar small compartments requiring only one sprinkler shall be permitted to be omitted from hydraulic calculations within the area of application. Sprinklers in these small compartments shall, however, be capable of discharging minimum densities in accordance with Figure 11.2...3.1.1. _______________________________________________ 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)
