2013 edition of NFPA 13, 9.3.6.6, Sprigs 4’-0 or longer shall be restrained….
Regards,
G. Tim Stone
G. Tim Stone Consulting, LLC
NICET Level III Engineering Technician
Fire Protection Sprinkler Design
and Consulting Services
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From: Jeff Werre <[email protected]>
Sent: Thursday, October 19, 2023 12:58 PM
To: Discussion list on issues relating to automatic fire sprinklers
<[email protected]>; George Medina Jr.
<[email protected]>
Subject: [Sprinklerforum] Re: 1" Armover Restraint
Where does the requirement to brace a sprig up at 4 feet come from?
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Jeff Werre, CFM
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From: Bob Caputo <[email protected] <mailto:[email protected]>
>
Sent: Thursday, October 19, 2023 9:41 AM
To: Discussion list on issues relating to automatic fire sprinklers
<[email protected]
<mailto:[email protected]> >; George Medina Jr.
<[email protected] <mailto:[email protected]> >
Subject: [Sprinklerforum] Re: 1" Armover Restraint
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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]
<mailto:[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
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