Hello A.P.Silva,
In my opinion I would have to agree all AID's should be zoned by
floor.
This is due to the use of the word "AND" in the following line.
If the
word
was "OR" I would be on your side of the fence.
"Alarm initiating devices" are given as "heat detectors,
waterflow switches and manual stations".
^^^
Tuesday, March 11, 2008, 2:12:35 AM, you wrote:
This is a 30,000 sq.ft. residential 4 storey building of
combustible
construction. The building code limits building area to approx.
18,000
sq.ft. My understanding is the firewalls are due to this area
limit.
30,000
sq.ft. building split into three, approx. 10,000 sq.ft. each. The
building
code also states that on the actuation of "alarm initiating
devices" the
fire alarm annunciator shall have separate zone indication for each
"floor
area". Floor area is defined as the space between the exterior
walls and
required firewalls. "Alarm initiating devices" are given as "heat
detectors,
waterflow switches and manual stations". My interpretation is
that the
intent of the code is satisfied if any one of the alarm initiating
devices
(AID) satisfy the zoning requirement. The AHJ insists that "all"
AID's
should be zoned per "floor area".
What I'd like to know is if other building codes have similar
annunciator
requirements, and if so, is the sprinkler system zoned for each
fire
compartment?
Tony
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Roland
Huggins
Sent: March 10, 2008 2:56 PM
To: [email protected]
Subject: Re: Horizontal Exits
Considering that a 4 story building can be a SINGLE zone for ALL
floors,
still can't see the barrier driving a split per floor zoning. The
mention
of triggering smoke control does flag that it
could be a performance based design building, then all bets are
off.
For a PBD, such thing are documented.
You may very well being dealing with a "seemed like a good idea
at the
time"
issue.
Roland
On Mar 10, 2008, at 1:55 PM, Justin Reid wrote:
Zoning the sprinkler system to one side versus the other will
tell the
fire department which side of the horizontal exit the fire is
located.
They may be stating that separate zoning is needed so they know
which
side of the horizontal exit to respond to. That is the only
reason I
can think of to zone the two sides differently. And to answer your
question, I have not seen a system split into two zones for just a
horizontal exit. But I am a newbie ( <5 years in the business so I
would defer to others on that).
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--
Best regards,
Charles Thurston CET mailto:
[EMAIL PROTECTED]
Coastal Fire Protection
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