When I've had multiple roof zones with extensive racking I'll feed the racks in roof area "A" off of the adjacent roof area "B"'s riser. Then serve "B"'s racks off of "A"'s roof system riser. Reasoning for this is that if you had an impairment in system "A" you only impact one system, either the roof or the racks not both within that particular area. OF course this all depends on the building configuration and whether you're manifolding the risers or have separate run-ins so it may or may not work in your building.
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 Fletcher, Ron Sent: Thursday, January 14, 2010 12:49 PM To: [email protected] Subject: In-rack system zoning We have 65,000 sqft of rack storage that requires in-rack sprinklers. The racks span an area that is protected by 4 roof systems. Can we use a single system to supply the in-rack and have all 65,000 sqft on a single valve? I thought that I read somewhere once upon a time that in-rack systems had to be zoned similar to roof systems i.e. 40,000 sqft max etc... Ron Fletcher Aero Automatic Phoenix, AZ _______________________________________________ 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)
