Arm over is defined as pipe supplying a single head - if I remember correctly. Restraint is not required for arm overs. So technically not required.
Travis Mack, SET MFP Design, LLC Sent from my iPhone > On Oct 20, 2013, at 6:01 PM, "Cahill, Christopher" <[email protected]> > wrote: > > Issue is not about vertical restraint from >100 psi. Well below. This is > strictly an EQ question. > > > Chris Cahill, PE* > Senior Fire Protection Engineer > Burns & McDonnell > 8201 Norman Center Drive > Bloomington, MN 55437 > Phone: 952.656.3652 > Fax: 952.229.2923 > [email protected] > www.burnsmcd.com > > Proud to be one of FORTUNE's 100 Best Companies to Work For > *Registered in: MN > > > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Dwight > Havens > Sent: Sunday, October 20, 2013 6:13 PM > To: [email protected] > Subject: Re: NFPA 13 '10 9.3.6 BL Restraint > > pendent heads w/ > 100 psi > > > > > > > On Sunday, October 20, 2013 6:44 PM, "[email protected]" > <[email protected]> wrote: > > Isn't the thrust restraint a requirement for systems with pressures in excess > of 100 psi? > > ----- Original Message ----- > From: Ron Greenman [mailto:[email protected]] > Sent: Sunday, October 20, 2013 09:42 PM > To: [email protected] > <[email protected]> > Subject: Re: NFPA 13 '10 9.3.6 BL Restraint > > Don't have anything at the moment. Is this eq country? Somewhere there's > something that requires up thrust restraint at the end of line. I think > lateral is only required for seismic areas, but I'd need to read the section > before I made an unequivocal statement. No books in the car. > > Sent from my iPhone > >> On Oct 20, 2013, at 2:08 PM, "Cahill, Christopher" <[email protected]> >> wrote: >> >> Got a code section that connects a length of a BL to a restraint or the >> inverse of what you said, that if it needs a hanger then it needs restraint? >> I got one that says it doesn't, 9.3.6.7 Drops and armovers shall not >> require restraint. 3.5.3 Arm-Over. A horizontal pipe that extends from the >> branch line to a single sprinkler or a sprinkler above and below a ceiling. >> I just find it odd I can have a 2" pipe 100' long serving one head and it >> doesn't need anything but regular old gravity hangers. Or I can't find >> anything to challenge 9.3.6.7. My case I have a bunch of 3-8' 1" legit >> armovers. Contractor didn't install restraint and I think he's right >> technically. >> >> Chris Cahill, PE* >> Senior Fire Protection Engineer >> Burns & McDonnell >> 8201 Norman Center Drive >> Bloomington, MN 55437 >> Phone: 952.656.3652 >> Fax: 952.229.2923 >> [email protected] >> www.burnsmcd.com >> >> Proud to be one of FORTUNE's 100 Best Companies to Work For >> *Registered in: MN >> >> >> >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of >> rongreenman . >> Sent: Sunday, October 20, 2013 2:19 PM >> To: [email protected] >> Subject: Re: NFPA 13 '10 9.3.6 BL Restraint >> >> Restraint is to avoid upward thrust and side to side thrust, whipping >> for Devo fans, at the end of a branch line. If an armover does not >> need a hanger it wouldn't need restraint >> >> >> On Sun, Oct 20, 2013 at 7:50 AM, Cahill, Christopher >> <[email protected]>wrote: >> >>> Two questions. >>> >>> Is there a length of an armover that needs restraint? Imagine a 12' >>> armover that only feeds one head. >>> >>> Can restraint be connected to something other than structure, like a >>> concrete floor above? >>> >>> Chris Cahill, PE* >>> Senior Fire Protection Engineer >>> Burns & McDonnell >>> 8201 Norman Center Drive >>> Bloomington, MN 55437 >>> Phone: 952.656.3652 >>> Fax: 952.229.2923 >>> [email protected]<mailto:[email protected]> >>> www.burnsmcd.com<http://www.burnsmcd.com/> >>> >>> Proud to be one of FORTUNE's 100 Best Companies to Work For >>> *Registered in: MN >>> >>> >>> >>> >>> _______________________________________________ >>> Sprinklerforum mailing list >>> [email protected] >>> >>> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprink >>> l >>> er.org >> >> >> >> -- >> Ron Greenman >> Instructor >> Fire Protection Engineering Technology Bates Technical College >> 1101 So. Yakima Ave. >> Tacoma, WA 98405 >> >> [email protected] >> >> http://www.bates.ctc.edu/fireprotection/ >> >> 253.680.7346 >> 253.576.9700 (cell) >> >> Member: >> ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC >> >> They are happy men whose natures sort with their vocations. -Francis >> Bacon, essayist, philosopher, and statesman (1561-1626) >> _______________________________________________ > >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl >> er.org _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl >> er.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 > _______________________________________________ > 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
