Ok, let me clarify. This is exposure protection against the side of a building per 13 and 15. There is a soffit at the roof level about 3' deep and a little over 2' wide. So this is not an exposure protection system with dry pilot heads in the complete open with nothing to collect heat.
With that being said, I am fine with the 8' if that is indeed the intent of 15 and there is no argument from me. Before I have that answer conclusively though, it seems that the requirement for 8' spacing in the great wide open then it should be increased by some measure if there is collection. My line of reasoning follows the thought that if this were a normal closed head system protecting under the soffit, then the heads would be spaced at a max of 15'. Greg McGahan Living Water Fire Protection (850) 937.1850 | Fax (850) 937.1852 | Cell (850) 554.3231 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Tuesday, March 16, 2010 10:26 AM To: [email protected] Subject: RE: pilot lines All pilot heads are the intermediate type like used in racks. Para. 6.5.2.4.9 has very specific wording, can your installation meet that criteria? If you can meet the vertical spacing and arrangement requirements then you can apply .9, if you can't then you're back to para. ....8 Since there is less structure to trap heat on typical outdoor arrangements, the spacing is reduced to 8ft. horizontally and also vertical separation limitations between levels must be recognized. 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 Greg McGahan Sent: Tuesday, March 16, 2010 10:23 AM To: [email protected] Subject: RE: pilot lines What about Para .9 that allows you to increase the spacing to 10'-0" for a given level? This para's explanation is indicative of pilot heads with nothing above them to collect heat. I also sent this to NFPA. Greg McGahan Living Water Fire Protection (850) 937.1850 | Fax (850) 937.1852 | Cell (850) 554.3231 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Tuesday, March 16, 2010 9:19 AM To: [email protected] Subject: RE: pilot lines If it's outside - 8ft. It's either inside or outside. Is this for a deluge system? 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 Greg McGahan Sent: Tuesday, March 16, 2010 10:12 AM To: [email protected] Subject: pilot lines NFPA #15 6.5.2.4 Para .2 - Pilot lines under a ceiling - spacing per 13 Para .8 - Outdoors - spacing at 8'-0 Situation - Soffit on the exterior of a building 2'-4" wide....... Which one is the absolute in this situation? Greg McGahan Living Water Fire Protection (850) 937.1850 | Fax (850) 937.1852 | Cell (850) 554.3231 _______________________________________________ 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) _______________________________________________ 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)
