h= 15/.433 = 34.64 ft v =(2gh)^.5 = 47.23 ft/sec ft^2 =((2.06/24)^2)* PI = .023 ft^2 .023 ft^2 * 47.23 ft/sec= 1.09 ft^3/sec 1.09 * 7.48 * 60 = 489 GPM 125,110,489 = not bad! Is this what you got?
If it is under seismic rules, 1/2" nipples are not allowed. -----Original Message----- From: Tom Duross [mailto:[email protected]] Sent: Tuesday, April 05, 2011 12:24 PM To: [email protected] Subject: Another design solution needed OK, here's one to throw around. Looked at a retrofit job last week. It's about 15K SF of office area being cut up. The old overhead grid system is all done with 5' flexheads off 1/2" outlets with reducer bushings. I asked why they called me. They need to add more heads, can I do the same as what's there now? In some instances, there are 2 flexheads off a single 1/2" outlet. Just for giggles, I ran some quick hydraulics using the main drain data, 125 S, 110 R. Seems like what's there will work (even the doubles) mostly due to the 2" branchlines between the 4" crossmains. Many need to be moved, some added, some removed,.. Keep going? TD _______________________________________________ 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)
