The committee discussion on this change was the in a 400 cubic foot enclosure,
it doesn’t matter where the sprinkler is relative to the shelf. Think about in
rack sprinklers and the product loads…. I agree there should be concern for
bumping the sprinkler but no one is loading the closet with
From an old fire guys perspective I’d be more concerned with accidental head
breakage than water dispersal.
Best.
> On 07/01/2021 3:01 PM Larrimer, Peter A (HEFP\19HEF) via Sprinklerforum
> wrote:
>
>
> Thanks for that clarification. I missed that.
>
> Pete
>
> -Original
Thanks for that clarification. I missed that.
Pete
-Original Message-
From: Sprinklerforum On Behalf
Of Dane Long via Sprinklerforum
Sent: Thursday, July 1, 2021 12:51 PM
To: sprinklerforum@lists.firesprinkler.org
Cc: Dane Long ; Larrimer, Peter A (HEFP\19HEF)
Subject: [EXTERNAL]
Peter,
One thing to emphasize is that it says 400ft3 not ft2. So, the thought is if
you have mechanical equipment like a furnace, you're not really going to
have much room to store anything in this closet. An example would be a
closet with an 8ft. ceiling can only be 7ftx7ft. This is 49sqft or
Pete,
You are correct. Where the closet is less than 400 ft3, no clearance is
required below the deflector
Bob Caputo
-Original Message-
From: Sprinklerforum On
Behalf Of Larrimer, Peter A (HEFP\19HEF) via Sprinklerforum
Sent: Thursday, July 1, 2021 10:36 AM
To:
My understanding had always been this was mainly related to shelves and the
like as an obstruction since the head is going to basically inundate the
closet. I believe it was Mr. Huggins that once reminded us that water isn't
like light and you don't have to see the head to get wet, as was a
>From the 2016 flavor of NFPA 13:
Section 23.4.1.2 says minimum size for steel pipe is 1". The exceptions
given in 8.15.20.4 and 8.15.20.5 are for nipples 4" or less in length.
Not what your customer will want to hear, but it is what it is . . .
Ed Kramer
Design Manager | Bamford Fire
I think 13 tells us in a round about way that 1/2" and 3/4" steel can only be
used as "Pilot Line" detector piping per Chapter 8 and Chapter 6. Look at Note
"B" in the allowed pipe size table in Chapter 6...it sends you to the pilot
line section in Chapter 8 and restricts those sizes to that
I have the 1985 book, and it wasn't allowed then.
Same rule as now, ½ x 1 ell to 1" drops.
-Original Message-
From: Sprinklerforum On Behalf
Of Jennifer Cornett via Sprinklerforum
Sent: Thursday, July 1, 2021 10:45 AM
To: Mark Phillips ;
Sprinklerforum@lists.firesprinkler.org
Cc:
The branchlines are 1", 1-1/4", etc. with a tee and the drop is ½" pipe to the
sprinkler heads. Where I would normally design a 1" drop, they used ½".
Sincerely,
Jennifer Cornett, NICET SET
Sprinkler Sales
Firetrol Protection Systems, Inc.
1001 Ave. B
Lubbock, Texas 79401
Ph 806-771-3500
Cell
Code allows you to retrofit that with a 1/2 x1 ell and a 1 “ new drop if the
outlets are 1/2” off line
Could you elaborate?
Sent from my mobile device
Please excuse spelling, grammar, and auto correction.
Mark Phillips
Branch Manager
Fire Sprinkler Design, Install, Inspections
Service,
NFPA 13 (2019 edition) states the following in two sections:
9.5.5.4 Closets. In all closets and compartments, including
those closets housing mechanical equipment, that are not
larger than 400 ft3 (11 m3) in size, a single sprinkler at the
highest ceiling level shall be sufficient without regard
I have a customer with an existing system that the fire marshal wants brought
up to code. Some is simply adding/relocating heads, but some is that the
original installation company used 1/2" drops for the sprinkler heads. The fire
marshal wants all of them changed. The customer wants to know
https://www.tyco-fire.com/index.php?P=detailprod=5910
Ryan L. Hinson, PE*, SET** \ Burns & McDonnell
Senior Fire Protection Engineer
O 612-900-3755 \ M 763-688-4045 \ F 952-229-2923
rhin...@burnsmcd.com \ burnsmcd.com
8201 Norman Center Drive, Suite 500 \ Minneapolis-St. Paul, MN 55437
I think you are thinking of the Tyco DSB-2 Sprinkler boot which included one
boot, two strap ties, and 1/3 oz. of adhesive. This component is/was found on
Tyco's Dry Sprinkler cuts...at least on the old cutsheets TFP500 and TFP550.
Not sure if it is still available.
Ryan L. Hinson, PE*,
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