Thanks Steve for the insight. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve Leyton Sent: Thursday, June 19, 2008 11:38 AM To: [email protected] Subject: RE: Wall hydrants
Regardless of the specifics, if the AHJ wants a wall hydrant and will approve the primary and auxiliary water supply arrangement(s) with combined mains, and if you can calculate an adequate allowance for the require outside streams, then I can't see why this would be any different than taking a hose stream allowance at the standpipe on a combined system. If the exterior stream demand exceeds the sprinkler design, then the mains would have to be designed at least for that higher flow rate, but I wouldn't undertake that design without CLOSE consultation with the serving fire department. Because of the inside/outside nature of this situation, I wouldn't presume it to be exactly like a combined system, but similar concepts are at work. Steve Leyton Protection Design & Consulting -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dewayne Martinez Sent: Thursday, June 19, 2008 9:18 AM To: [email protected] Subject: RE: Wall hydrants In the past, the AHJ's have only required 250 GPM at the wall hydrant. This would be combined in at the point of connection to a common system point. I think the intent is to provide an outside hose connection for the FDP when it is impractical / impossible to get their pumper truck to this location. Dewayne -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve Leyton Sent: Thursday, June 19, 2008 10:31 AM To: [email protected] Subject: RE: Wall hydrants Would you be calculating the interior piping for the combined flows of the exterior streams and interior sprinkler system? Keeping in mind that a wall hydrant - if it's a "real" wall hydrant and part of the site fire flow design - would likely have to discharge 1500 GPM minimum, perhaps more per the Fire Code. Steve Leyton Protection Design & Consulting -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dewayne Martinez Sent: Wednesday, June 18, 2008 3:57 PM To: [email protected] Subject: Wall hydrants Does a wall hydrant need a dedicated feed from the riser or can it be fed off an adjacent sprinkler system as long as a PIV control valve is installed? I have only designed them with a dedicated feed but a salesman is questioning this and I could not find anywhere in NFPA to back it up. Thanks, Dewayne _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
