...and that is 60 minutes at the "greater area" of 1500 SQ FT or 4 heads per 2.1.3.1:
"2.1.3.1 Provide residential sprinklers over a demand area of 1500 ft2 (140 m2) or the area provided by four sprinklers. Design to the option that requires the greater area." David W. S. Blackwell, II, PE, CFI-I, CFPE Engineering ---------------------------------------------------------------- Office of State Fire Marshal 141 Monticello Trail Columbia, SC 29203 Phone: 803.896.9833 Fax: 803.896.9806 Email: [email protected] OSFM Website: http://www.llr.state.sc.us/firemarshal.asp ---------------------------------------------------------------- -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of David Blackwell Sent: Friday, February 05, 2010 1:55 PM To: [email protected] Subject: FM Global Data Sheet 2-5 The scope of the data sheet in 1.0 says: "These recommendations do not conflict with internationally recognized residential sprinkler standards (including NFPA 13D), except in the matter of sprinkler density and design area." It doesn't mention changing the water supply duration which is normally 10 minutes [or 7 minutes if a single story building and less than 2000 sq. ft.] per NFPA 13D. I note that they require 60 minutes of water supply duration in 2.1.4.2: "2.1.4.2 Ensure the sprinkler system is capable of supplying the total system water demand for a minimum duration of 60 minutes." It looks like this would negatively impact the cost of systems in rural areas. David W. S. Blackwell, II, PE, CFI-I, CFPE Engineering ---------------------------------------------------------------- Office of State Fire Marshal 141 Monticello Trail Columbia, SC 29203 Phone: 803.896.9833 Fax: 803.896.9806 Email: [email protected] OSFM Website: http://www.llr.state.sc.us/firemarshal.asp ---------------------------------------------------------------- -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of tom poisal Sent: Friday, February 05, 2010 12:35 PM To: [email protected] Subject: Re: help the NAHB! For those interested; FM Global just published Data sheet 2-5, Installation Guidelines For Automatic Sprinklers in Residential Occupancies, might be fuel for the fire! _______________________________________________ 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)
