Neither. When sprinklers are combined with standpipes, it is required that every sprinkler system connection to a standpipe be furnished with both a check valve and control valve (14). Schematically, sprinklers are downstream of a standpipe, on the system side of the required sectional standpipe control valve. If required standpipe hose valves are connected to a sprinkler system you've got the reciprical condition, which is only allowed in selected occupancies by code.
To combine them, lay out your standpipe system - valves on each floor and risers. Then feed the sprinklers off of the standpipe system: 1) With a separate valved connection at the main riser and a dedicated sprinkler riser to upper floors, or 2) Valved connection at each floor or, 3) A valved connection somewhere along the standpipe inter-connecting feed main ahead of the standpipe section control valves. Keep in mind that if you have 3 or more hose connections on any one floor supplied by a single standpipe, the demand is 750 GPM. IF you have more than one standpipe riser, it's possibe to arrange them as 1+3 or 2+2 or 3+1, so you really need to do this thoughtfully. Sounds like you might need another pair of eyes? Steve Leyton Protection Design & Consulting Sent from my Verizon Wireless BlackBerry -----Original Message----- From: "Keith Pepin" <[EMAIL PROTECTED]> Date: Sat, 1 Nov 2008 08:22:54 To: <[email protected]> Subject: Re: Standpipe system I seen that. This Bldg is a� single floor with 4 hose valves. Does this mean that the standpipe system connects to the sprinkler system riser, or can each hose valve individually connect to the sprinkler system mains? -----Original Message----- From: "John Drucker" <[EMAIL PROTECTED]> Date: Fri, 31 Oct 2008 23:45:01 To: <[email protected]> Subject: RE: Standpipe system Keith, Steve Take a look at 2006 IBC 905.3; "Standpipe systems are allowed to be combined with automatic sprinkler systems" Does that help you're situation ? John Drucker Fire Protection Subcode Official (AHJ) New Jersey -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> ] On Behalf Of Steve Leyton Sent: Friday, October 31, 2008 4:00 PM To: [email protected]; [email protected] Subject: RE: Standpipe system The building code described specific conditions where hose valves can be connected to sprinkler systems, such as covered mall buildings.�� NFPA 14 describes the requirements for design of standpipe systems; NFPA 13 same for sprinkler systems.�� Both standards prescribe the provisions for combined systems but IF you're requirement is for a standpipe system (as prescribed by CODE), then the answer is likely that the hose connections can't just be taken off the sprinkler piping.��� Unfortunately, it's not just a yes/no equation so the answer is conditional. Steve Leyton Protection Design & Consulting ________________________________ From: [EMAIL PROTECTED] on behalf of Keith Pepin Sent: Fri 10/31/2008 8:26 AM To: [email protected] Subject: Standpipe system The Engineer of Record has indicated that standpipe hose valves shall be located in a building that we are designing. Of course he hasn't shown how they are to be connected, his note is to connect to the sprinkler system. In the past I have ran a separate main w/ a control valve from the riser to feed the hose valves. Can they be connected to the sprinkler mains? Thanks Keith _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum <http://lists.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 http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum <http://lists.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 http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum <http://lists.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)
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