I do a fair amount of work in seismic areas and drops were never an issue. 9.3.6.7 in the 2013 edition seems to corroborate that. "Drops and armovers shall require restraint". We do include them in the ZOI calculations though.
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=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_campaign=sig-email&utm_content=webmail&utm_term=link> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Tue, Mar 2, 2021 at 10:39 AM Kyle.Montgomery via Sprinklerforum < [email protected]> wrote: > When installing a CPVC system in a seismic area (area where seismic > bracing is required) are there any special considerations needed for the > drops to sprinkler heads? In the past, with steel pipe systems we've often > utilized flexible sprinkler connections to avoid any concern about > differential movement between the ceiling and the overhead structure and > bracing of the ceiling. I've also seen oversized escutcheons spec'd for the > same reason. Do you need to do something similar with CPVC systems, or can > you just drop to the head with CPVC pipe and a standard-sized escutcheon? > > The particular project I'm looking at is in Ontario, California, if that > helps. > > I appreciate any input. > > -Kyle M > _______________________________________________ > 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
