George, An arm over to a single sprinkler is defined as an arm over whereas when two sprinklers are served, it’s considered a branch line. Branch lines require restraint. If the arm over is to a sprig up longer that 4ft, the sprig requires restraint.
I am not aware of a requirement to restrain the arm over (but if it’s long enough….) I’m sitting in an airport without a book so there might be other opinions Bob Caputo On Thu, Oct 19, 2023 at 11:35 AM George Medina Jr. < [email protected]> wrote: > I have an armover that is 2'-4" in length. The SEOR is requiring me to put > a diagonal brace on the branch line that the armover is supplied from and a > restraint on the armover ( I had left a branchline restraint detail from my > template and I probably should not have left it on with these small > aromovers) When is an armover required to be restrained (if at all?). Could > not find any specific length in NFPA-13 (2016 ed.) > > > George Medina Jr. > Sr. Fire Sprinkler Designer > SINGLETON FIRE PROTECTION INC. > Office: (818) 252-5744 > Cell: (323) 906-5701 > Business Hours: 9:00am-5:00pm > > > _________________________________________________________ > SprinklerForum mailing list: > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > To unsubscribe send an email to > [email protected]
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