That is using a basis of 16x16 and assuming the sprinklers are maxed out
in a perfect world.
I believe the handbook is trying to clarify that even though you could
go to 900 sq ft, you still have to cover a minimum of 5 sprinklers. So,
in theory, if you have 20x20 spacing, even though you could do 900 sq ft
for a 10' ceiling, you would have a potential 2000 sq ft design area.
It is not saying you have to do an area of 5x sprinkler coverage. If
you sprinklers cover 18x12, you are required to calculate them at 18x18
listings. If you get the QR reduction to 900 sq ft, you are still going
to have to calc a minimum of 5 sprinklers.
Travis Mack, SET
MFP Design, LLC
2508 E Lodgepole Drive
Gilbert, AZ 85298
480-505-9271
fax: 866-430-6107
email:[email protected]
http://www.mfpdesign.com
https://www.facebook.com/pages/MFP-Design-LLC/92218417692
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LinkedIn: https://www.linkedin.com/in/travismack
On 6/27/2016 6:38 PM, Trillium Fire Sprinkler Design Inc. wrote:
its say on page 598n 2013 handbook. ``if the reduction of area is
applicable such as that the minimum area density area was 900 sqft,
then the 1280 sqft area would be required.`` according to 11.2.3.2.2.3
*From:*Sprinklerforum
[mailto:[email protected]] *On Behalf Of
*Steve Leyton
*Sent:* June-27-16 9:30 PM
*To:* [email protected]
*Subject:* RE: EXTENDED COVERAGE SPRINKLERS
If the sprinklers are 18' apart or 9' off of walls, then 5 x 324 SF
would be correct.
Steve
-------- Original message --------
From: Travis Mack <[email protected] <mailto:[email protected]>>
Date: 6/27/16 6:22 PM (GMT-08:00)
To: [email protected]
<mailto:[email protected]>
Subject: Re: EXTENDED COVERAGE SPRINKLERS
You are reading wrong. You need to calculate 5 ex COV sprinklers at a
minimum. You don't have to do 5x324. If they only cover 1400 sq ft for
whatever reason so be it. You still calc 5.
Travis Mack, SET
MFP Design, LLC
"Follow" us on Facebook:
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Sent from my iPhone
On Jun 27, 2016, at 6:07 PM, Trillium Fire Sprinkler Design Inc.
<[email protected] <mailto:[email protected]>> wrote:
I HAVE A 750 SQFT CLASS ROOM. DUE TO THE CONFIGUARTION OF THE
LIGHTS AND A FEW BUMP OUTS IN THE WALLS. I NEED TO USE FIVE
18x18 EC SPRINKLERS.
IF I READ THE CODE CORRECTLY. I NEED TO CALCULATE 5 TIMES 324
SQFT. WHICH IS 1620 SQFT. WONDERING IF I AM READING THIS RIGHT?
I DON'T SEE THE ADVANTAGE WHEN I CAN USE 7 STANDARD Q.R.
SPRINKLERS TO COVER THE SAME ROOM. 11' CEILINGS MY DESIGN AREA
WOULD ONLY BE 923 SQFT.
AM I MISSING SOMETHING?
THANKS
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