The insulation is on the roof, the conduit is run inside the hollow
steel box beams. Impractical for our pipe. The whole bldg design was
completed with a PE who completly ignored the coverage in this area.
To my contractor friends, this is a prominent, picky architect that we
have done 3 jobs with in the last 6 months. He likes us and therefore
makes you want to work harder to please him. It always helps when an
architect is pulling for you on difficult designs.
Thanks,
Greg
On 12/3/2010 9:14 AM, Ron Greenman wrote:
How are the electricians running hidden conduit for the lighting? How
is the insulation hidden?
On Fri, Dec 3, 2010 at 7:11 AM,<[email protected]> wrote:
Really, deluge? Since many people freak out with wet systems and the
potential of one sprinkler opening I can't imagine an architect or owner
embracing a deluge system in this type of environment. Although if you tell
them it's a sprinkler system like they've seen in the movies maybe they would
think that as being OK.
Also there are spacing restrictions on discharge nozzles which are more
restrictive than for wet systems, 10 ft horizontally unless the nozzle is
specifically listed for spacing exceeding that amount.
And in this type of environment under these conditions, I'd personally would
never suggest using a smoke detector. Too many potential for false trips
unless you cross-zone them by using Ion and PE types. Heat detection would be
my first choice unless there would be some extenuating circumstances that would
prevent their use.
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
[email protected]
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Chris Cahill
Sent: Friday, December 03, 2010 9:34 AM
To: [email protected]
Subject: RE: difficult one
For some reason this stuck in my mind, now I have an answer you might
pursue.
I think the deluge solution might have some merit. Often I think we forget
to separate the 2 distinct functions of a sprinkler head. First and I do
mean first it is a heat detector. Second it water distribution
valve/device. The Code deals with both - heads within 12"....3x rule...
I don't see a reason you can't get equivalent detection from some other
device. Could even be a smoke detector as they are faster than heats. Next
make sure the head distribution covers the floor with the minimum density.
There isn't even a reason to locate the heads near the ceiling as long as
the distribution is adequate. Probably a few, 4' or 5' above the floor would
be adequate. And with a deluge you are getting extensive pre-wetting far in
excess or standard wet, dry, PA systems.
Now this isn't a sprinkler contractor solution as it is outside the Code.
Will require a PE to be legal. And obviously AHJ agreement.
Chris Cahill
-----Original Message-----
From: Greg McGahan<[email protected]>
Sender: [email protected]
Date: Thu, 02 Dec 2010 16:46:25
To:<[email protected]>
Reply-To: [email protected]
Subject: difficult one
The situations is this:
Preface - I have already exhausted the "you can't because" in trying to
convince him to run two lines exposed in this space.
Light Hazard
Corridor / Lobby with a center section Sloped, exposed construction 8
in on 12in - 20' in width
On each side the ceiling drops about 4' to smooth flat ceilings
The architect wants to find a way to eliminate exposed pipe. He prefers
to use sidewalls on the vertical 4' sides which I told him we could not
do..
His question is can he install detection at the peak, use sidewalls as
described above with a deluge valve.
Does anyone have any other creative ideas for this situation?
Thanks,
Greg
--
Greg C. McGahan Living Water Fire Protection, LLC. 1160 McKenzie Road
Cantonment, FL 32533 850-937-1850 Fax 850-937-1852
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--
Greg C. McGahan Living Water Fire Protection, LLC. 1160 McKenzie Road
Cantonment, FL 32533 850-937-1850 Fax 850-937-1852
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