The AHJ wanted the friction loss to reflect the gpm. 1.5 meter and BFP.
Sent from my iPhone
> On Nov 1, 2019, at 1:37 PM, cliff--- via Sprinklerforum
> wrote:
>
>
> Owen,
>
> It sounds like the AHJ is simply trying to determine if the water meter and
> BFP that are being used can
Owen,
It sounds like the AHJ is simply trying to determine if the water meter and BFP
that are being used can actually flow the 61 gpm that you have in the calcs.
Some meters and BFP aren’t listed for those flows.
Cliff Whitfield, SET
President
Fire Design, Inc.
184 Comfort Place
I’m in California. I believe the sprinkler head cut sheet requires a 4 head
calc if heads are on a slope or in beams.
Sent from my iPhone
> On Nov 1, 2019, at 1:15 PM, John Irwin wrote:
>
>
> Where you live does the AHJ have the authority to write his own fire code? In
> Florida we would
Ask the correct question, Owen.
Is the "compartment" one with a beamed ceiling with sprinklers at the
bottom of the beams, or beamed and sloped with sprinklers at the bottom
of the beams, or in the pockets? And, if any of the above are true is
the compartment of greater than 600 ft²?
It
Yes to the friction loss through the BFP and WM, but no basis for the 4
sprinkler calc. Only two are required unless FL has adopted a 4 sprinkler 13D
calc.
Thank you,
Bob Knight, CET III
Fire by Knight, LLC
208-318-3057
-Original Message-
From: Sprinklerforum
On 11/1/2019 4:15 PM, John Irwin via Sprinklerforum wrote:
Where you live does the AHJ have the authority to write his own fire
code? In Florida we would say "that's great that you want that, but no."
Happens frequently enough here in Ohio. And when it does, NFPA cedes
authority to the local.
Good afternoon. Is AHJ confused with 13-R? Did someone one the owner’s side say
they wanted a four head design for their 12,000 sf, three generation home?
My water dept’s would not have let a meter with that Q of water through the
domestic meter. A large enough meter would undercount hundred
Where you live does the AHJ have the authority to write his own fire code? In
Florida we would say "that's great that you want that, but no."
13D is two sprinklers. Do you even have 4 sprinklers in a single compartment?
This kind of thing makes me crazy.
John Irwin
West Coast Branch Manager
I have an AHJ who wanted a 4 head calculation on a 13D system. The heads being
used flow 13 gpm. 13 x 4 + 5 domestic = 57 gpm.
After running the calculations, the calculations indicate that head 1 is
flowing 13 gpm, head 2 flowing 13.2 gpm, head 3 flowing 14 gpm, and head 4
flowing 15.6
