Just remember to allow for thermal expansion and contraction. It can get very ugly if the CPVC is restrained and thermal expansion and contraction has not been appropriately allowed for. This applies when a building is warm in the summer during construction and then air conditioning is turned on as well as heating and cold weather changes.
Scott Office: (763) 425-1001 x 2 Cell: (612) 759-5556 -----Original Message----- From: Sprinklerforum <sprinklerforum-boun...@lists.firesprinkler.org> On Behalf Of Bob Knight via Sprinklerforum Sent: Wednesday, December 30, 2020 2:36 PM To: sprinklerforum@lists.firesprinkler.org Cc: Bob Knight <b...@firebyknight.com> Subject: RE: CPVC EQ Bracing - 2 hole straps and another question 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:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of J H via Sprinklerforum Sent: Wednesday, December 30, 2020 1:24 PM To: sprinklerforum@lists.firesprinkler.org 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 < sprinklerforum@lists.firesprinkler.org> 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: > sprinklerforum-boun...@lists.firesprinkler.org] > On Behalf Of Matthew J Willis via Sprinklerforum > Sent: Wednesday, December 30, 2020 12:28 PM > To: sprinklerforum@lists.firesprinkler.org > 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 <sprinklerforum-boun...@lists.firesprinkler.org> > On Behalf Of J H via Sprinklerforum > Sent: Wednesday, December 30, 2020 12:13 PM > To: sprinklerforum@lists.firesprinkler.org > Cc: J H <design.azfire...@gmail.com> > 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 > Sprinklerforum@lists.firesprinkler.org > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > > 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 Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
