IS it a firewall or a rated partition? A firewall can often be
identified by what looks like two walls butted together since they
have to remain standing with structural collapse on either side(kinda
like seismic joints for structural steel). Haven't looked closely
lately at the penetration allowance but you shouldn't be seeing
doorways. Must confess, I haven't focused on construction issues in
a long time but such basic tenants should be the same as in my
Flintstone days.
If it is a firewall, each has a separate floor area because they are
separate buildings with common walls. So, are separate zones
required in separate buildings?
Just because the owner/GC is using an accelerated design as you go
format doesn't mean the the architect/engineer of record are exempt
from such trivial issues.
Roland
On Mar 8, 2008, at 11:00 AM, A.P.Silva wrote:
I have another question related to this issue.
A four storey residential buiding, having 30,000 sq.ft. building
area, has
two firewalls, splitting it to 3 compartments. The City is saying each
compartment (approx. 10,000 sq.ft.) needs a separate zone.
As per building code:
The annunciator shall have separate zone indication of the
actuation of the
alarm initiating devices in each "floor area" so that the area of
coverage
for each zone is neither (a) more than one storey, nor (b) more
than the
system area limits as specified in NFPA 13.
"Floor area" is defined as any space between the exterior walls and
any
required fire walls.
I'm saying the zone indicatipon must be obtained by another alarm
initiating
device. Not sprinkler flow switch. The problem is the building code
also
permits deletion of heat detectors, if the building is sprinklered.
So that
leaves only manual pull stations and sprinklers.
I know to reply, the applicable building code has to reviewed in its
entirety. But most building codes are similar. My question is, are
there any
other jurisdiction that would require sprinkler zoning for each
compartment?
Tony
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Jamie Seidl
Sent: March 7, 2008 3:02 PM
To: '[email protected]'
Subject: Re: Horizontal Exits
Yup in the NC 2006 IBC we have that same exception.
----- Original Message -----
From: [EMAIL PROTECTED]
<[EMAIL PROTECTED]>
To: [email protected]
<[email protected]>
Sent: Fri Mar 07 16:58:39 2008
Subject: RE: Horizontal Exits
What Jamie said. An exit through a fire-rated separation; the
reason for
Class I connections on both sides is that one side is presumed to be
separated and safe from the fire on the other.
Remember though, that if you are considering said connections based on
prescriptive code requirements, you should check out whether
there's an
exception your state's adopted version of the IBC, section 905.4
(Location
of Class I standpipe hose connections. The new California version,
based on
2006 includes the following for location of connections, which I
think is
straight IBC without amendments:
905.4.2 On each side of the wall adjacent to the exit opening of a
horizontal exit.
Exception: Where floor areas adjacent to a horizontal exit are
reachable
from exit stairway hose connections by a 30-foot hose stream from a
nozzle
attached to 100 feet of hose, a hose connection shall not be
required at the
horizontal exit.
Steve Leyton
Protection Design & Consulting
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Jamie Seidl
Sent: Friday, March 07, 2008 1:07 PM
To: [email protected]
Subject: RE: Horizontal Exits
Chap 10 of the 2003 IBC.
Exit, Horizontal. A path of egress travel from one building to an
area in
another building on approximately the same level, or a path of
egress travel
through or around a wall or partition to an area on approximately
the same
level in the same building, which affords safety from fire and
smoke from
the area of incidence and areas communicating therewith.
(Think 2 hr fire walls, double doors in corridors with magnetic
holders).
Jamie Seidl
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Richard
Battershell
Sent: Friday, March 07, 2008 3:45 PM
To: [email protected]
Subject: Horizontal Exits
Class I standpipes as per NFPA 14 7.3.2 (2)2004 ed. requires hose
connections be provided "On each side of the wall adjacent to the exit
openings of horizontal exits". What constitutes a horizontal exit?
Thanks for the help.
Richard Battershell
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