Yeah, 12 above (four sprinks on three branch lines), minimum design area of 960 sq. ft., plus when installed above and below obstructions include discharge for two additional sprinklers for one of the other levels. (NFPA 13, 2002, 12.3.2.3.3 & 12.3.2.3.4)
12+2=14. Yup that's why I got. Did have to take the shoes off to verify that data, so we should be good to go. 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 Travis Mack, SET Sent: Tuesday, November 04, 2008 5:03 PM To: [email protected] Subject: RE: ESFR Heads below obstructions It must be the election that is frying our brains. I read all of that and see you need 12 at the roof, plus up to 2 below the obstruction for a max of 14 ESFR sprinklers. What say everyone? T-Mack -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of danarbel Sent: Tuesday, November 04, 2008 2:48 PM To: [email protected] Subject: RE: ESFR Heads below obstructions Well, I read all that and it seems that all you need are 12 heads Dan -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: 04 November, 2008 7:28 PM To: [email protected] Subject: ESFR Heads below obstructions Dan, All references here are from the '07 edition of NFPA-13: 14.4.4 Where ESFR sprinklers are installed above and below obstructions, the discharge for up to two sprinklers for one of the levels shall be included with those of the other level in the hydraulic calculations. 15.4.4 Where ESFR sprinklers are installed above and below obstructions, the discharge for up to two sprinklers for one of the levels shall be included with those of the other level in the hydraulic calculations. 16.2.3.5 Where ESFR sprinklers are installed above and below obstructions, the discharge for up to two sprinklers for one of the levels shall be included with those of the other level in the hydraulic calculations 16.3.3.6 Where ESFR sprinklers are installed above and below obstructions, the discharge for up to two sprinklers for one of the levels shall be included with those of the other level in the hydraulic calculations. 17.2.3.4 Where ESFR sprinklers are installed above and below obstructions, the discharge for up to two sprinklers for one of the levels shall be included with those of the other level in the hydraulic calculations. 17.3.3.5 Where ESFR sprinklers are installed above and below obstructions, the discharge for up to two sprinklers for one of the levels shall be included with those of the other level in the hydraulic calculations. 22.4.4.6.4 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 ESFR sprinklers are installed above and below obstructions, the discharge for up to two sprinklers from one of the levels shall be included with those of the other level in the hydraulic calculation. Based on what I read in the ROP just published it doesn't look like any of these have been removed, although it appears that the wording in 22.4.4.6.4 has been moved around a bit, and a new 22.4.4.6.4.1 has been added (See 13-462, Log CP82 in the ROP) Hope that is what you were after. * *PARSLEY CONSULTING Ken Wagoner, SET 760.745.6181 voice 760.745.0537 fax [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> e-mail www.ParsleyConsulting.com <http://www.ParsleyConsulting.com> website danarbel wrote: > Question regarding the number of ESFR heads required for hydraulic calc. > > The nominal number is 12. > > There was a requirement to add 2 heads if there are heads installed > below beams or AC ducts. > > If I'm not wrong the addition of 2 heads was abolished. > > Please confirm or correct me, > > Dan Arbel > > > _______________________________________________ > Sprinklerforum mailing list > http://lists.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) > > No virus found in this incoming message. > Checked by AVG - http://www.avg.com > Version: 8.0.138 / Virus Database: 270.8.6/1765 - Release Date: > 11/3/2008 4:59 PM > > > > _______________________________________________ Sprinklerforum mailing list http://lists.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) __________ NOD32 3580 (20081103) Information __________ This message was checked by NOD32 antivirus system. http://www.eset.com _______________________________________________ Sprinklerforum mailing list http://lists.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) __________ NOD32 3583 (20081104) Information __________ This message was checked by NOD32 antivirus system. http://www.eset.com _______________________________________________ Sprinklerforum mailing list http://lists.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 http://lists.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)
