Personally, I would provide the restraint and be done. As Travis said, apply the less than 6" criteria and you should be good with the CPVC hangers.
9.3.5.8.5 Four-way bracing shall not be required where risers penetrate intermediate floors in multistory buildings where the clearance does not exceed the limits of 9.3.4. Thank you, Bob Knight, CET III Fire by Knight, LLC 208-318-3057 -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of J H via Sprinklerforum Sent: Wednesday, December 30, 2020 1:24 PM To: [email protected] Cc: J H Subject: Re: CPVC EQ Bracing - 2 hole straps and another question So the sidewall sprinklers for the upper floor of this project are being fed from the system below due to freezing concerns at the upper level. Of course the line will be strapped to the wall framing on it's way up and so according to the definitions if I'm supplying a single sprinkler it would be a 'sprig' and just require a two-hole strap on the way up (restraint) while a couple of spots on the project will feed two sprinklers from one tap off the lower floor - I'm guessing that in the case of more than two sprinklers it's no longer a 'sprig' and would be a riser and would require a 4-way brace. Sound about right? <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai gn=sig-email&utm_content=webmail&utm_term=icon> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai gn=sig-email&utm_content=webmail&utm_term=link> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Wed, Dec 30, 2020 at 1:04 PM Bob Knight via Sprinklerforum < [email protected]> wrote: > Sprigs do not require sway bracing, but there is this: 9.3.6.6 Sprigs 4 > ft or longer shall be restrained against lateral movement. > > > Thank you, > > Bob Knight, CET III > Fire by Knight, LLC > 208-318-3057 > > > -----Original Message----- > From: Sprinklerforum [mailto: > [email protected]] > On Behalf Of Matthew J Willis via Sprinklerforum > Sent: Wednesday, December 30, 2020 12:28 PM > To: [email protected] > Cc: Matthew J Willis > Subject: RE: CPVC EQ Bracing - 2 hole straps and another question > > To my knowledge, the 2 hole strap is listed as a hanger only. Not for > seismic. > > The second question is a good one. > I love Chapter 3, especially for seismic. > > Check 3.5.11 in the 2016 for a "Sprig". > > The standard mandates riser for 4 way if they exceed 3'-0". > > Riser Nipples, the piece between a Cross Main and Branchline, 3.5.9, are > excluded. > > 3.5.10 is for "Risers". > > Given that the definition of a sprig, seems different than Riser, you may > have a point. > > But Riser is pretty broad. > > R/ > Matt > > > > > > -----Original Message----- > From: Sprinklerforum <[email protected]> On > Behalf Of J H via Sprinklerforum > Sent: Wednesday, December 30, 2020 12:13 PM > To: [email protected] > Cc: J H <[email protected]> > Subject: CPVC EQ Bracing - 2 hole straps and another question > > Hello, > I thought that two hole straps used to secure CPVC acted as seismic > bracing? > I don't know where I've heard that and couldn't find anything in the > standard. Is this correct? > > Also, if you have a 1"x8'-6" riser to a single horizontal sidewall > sprinkler > would that technically be an 'armover' and not require seismic or would > that > fall under being a riser requiring seismic bracing? > > Thanks, > JH > > < > https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai > gn=sig-email&utm_content=webmail&utm_term=icon > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai gn=sig-email&utm_content=webmail&utm_term=icon> > > > Virus-free. > www.avast.com > < > https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai > gn=sig-email&utm_content=webmail&utm_term=link > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai gn=sig-email&utm_content=webmail&utm_term=link> > > > <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai gn=sig-email&utm_content=webmail&utm_term=icon> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai gn=sig-email&utm_content=webmail&utm_term=link> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
