In either case this will not be a combination system. We will have a separate system serving the actual system. I other words I will have four standpipes and one riser feeding all of the heads and then a separate riser that will be dry for the attic. Unless someone sees a flaw with this. My pressure is such that I will have to have a pump no matter what I do because the pressure is low to begin with.
Karen Purvis Designer Facility Systems Consultants 714 S Gay St Knoxville, TN 37902 ph.865-246-0164 fax 865-246-1084 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve Leyton Sent: Tuesday, August 14, 2007 11:47 AM To: [email protected] Subject: RE: interconnection of standpipes Jeff: I agree with your statement that Karen's description meets the intent of the standard, but not necessarily that sprinklers can't come off the bulk main(s). Whether floor controls are required or not, you could pull a sprinkler riser off the bulk piping, so long as it is sectionally valved. Add the appropriate hose stream allowance at the POC and I think it's acceptable. A "combined standpipe system", albeit with a separate sprinkler riser. Steve Leyton Protection Design & Consulting The foregoing is my opinion only and is not intended to represent the NFPA 14 Technical Committee, nor serve as an interpretation of the standard. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jeff Hewitt Sent: Tuesday, August 14, 2007 8:03 AM To: [email protected] Subject: Re: interconnection of standpipes Karen, What you are suggesting meets the intent of the standard, in my opinion, even though it says to interconnect them at the bottom. As long as you have established a separate and distinct standpipe system, it should not matter if you tie-in on the first floor or third floor for the interconnection. Once the standpipe system has been established, you can then utilize it for combination systems via control valves, check valves and flow switches. One common mistake I have seen is trying to take sprinkler protection from bulk standpipe mains, prior to interconnection with other standpipes. Jeff Hewitt, PE, SET, MSFPE Bi-State Fire Protection Corporation ----- Original Message ----- From: "Karen Purvis" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, August 14, 2007 9:39 AM Subject: interconnection of standpipes > > I have not been able to find a good answer to this question so I turn to > my > fellow forum readers. When interconnecting standpipes NFPA 14 a.7.5 says > it > should occur as close as possible to the source of supply as possible. If > I > have four pipes and three can be connected on the first floor but the > third > one needs to go over an exposed area can it connect on the third floor to > the closest pipe or is there a better way of connecting them. > > Karen Purvis > Designer > Facility Systems Consultants > 714 S Gay St > Knoxville, TN 37902 > ph.865-246-0164 > fax 865-246-1084 > > > > _______________________________________________ > 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)
