does anybody else find the fact that the floor itself is an obstuction
to pattern development a bit disturbing? at 6 feet between sprinklers
with 7 inch max deflector above the floor, the 'dry spots' are going
to be 2 or 3 feet long!
Quoting rfletc...@aerofire.com:
8.15.6.1 refers to "combustible" platforms. I think 8.16.5.2 #3 is
there in case the platform is made of grating. The handbook says
8.16.5.2 is there as an exception to the rule that all "combustible"
spaces be sprinklered.
Ron Fletcher
Aero Phoenix
-----Original Message-----
From: sprinklerforum-boun...@firesprinkler.org
[mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of
Cahill, Christopher
Sent: Friday, November 30, 2012 7:01 AM
To: sprinklerforum@firesprinkler.org
Subject: RE: Sprinklers under platforms
Is it enclosed concealed space under the platform except for the
perforated deck? Guess I haven't seen any equipment platform that
is enclosed underneath making them all need heads. But if it meets
#1 and the only question is tight yeah I think so. I think the
requirement is to keep trash out. Yes , I know that's what #1 says
and seems redundant to say again a different way in #3.
Chris Cahill, PE*
Senior Fire Protection Engineer, Aviation & Facilities Group Burns &
McDonnell
8201 Norman Center Drive
Bloomington, MN 55437
Phone: 952.656.3652
Fax: 952.229.2923
ccah...@burnsmcd.com
www.burnsmcd.com
Proud to be one of FORTUNE's 100 Best Companies to Work For
*Registered in: MN
-----Original Message-----
From: sprinklerforum-boun...@firesprinkler.org
[mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of
craig.pr...@ch2m.com
Sent: Friday, November 30, 2012 7:51 AM
To: sprinklerforum@firesprinkler.org
Subject: Sprinklers under platforms
Got an elevated non-combustible equipment access platform that is 8"
off the floor. The contractor is informing the GC that because the
platform is over 48" wide there needs to be sprinklers below.
Trying to put this fire out and it appears the NFPA 13-2007,
8.15.6.2 would cover it.
However the deck is perforated aluminum plate with 1/4" holes on
1/2" centers with a polyurethane non-slip coating on top and there
is question on whether 8.15.6.2 would nullify the permission to omit
sprinklers "(3) The floor over the space is of tight construction".
There are no flammable of combustible liquids in the space.
Craig L. Prahl, CET
Fire Protection
CH2MHILL
Lockwood Greene
1500 International Drive
Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
CH2MHILL Extension 74102
craig.pr...@ch2m.com
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