Allow me to tweak this. If your statement that the maximum single
floor area is 18,000 sf, fire BARRIERS do not help. I would still
question the issue since why would they install TWO fire walls since
ONE would have been enough in a 30,000 sf bldg if the 18,000 is
accurate.
Just to be complete, what is your basis for the maximum allowed area
per floor since I am having trouble hitting 18,000 sf (it is too small)?
Roland
On Mar 11, 2008, at 7:50 AM, Roland Huggins wrote:
You are confusing the issue by not carefully applying your words.
You have identified the definition of floor area as being between
exterior walls and fire walls. Then you say the building (SINGULAR)
has three floor areas of 10,000 sf each for a total of 30,000
sf. You are missing the fact that a single structure divide by
two fire walls creates THREE buildings (see section 705.1). So
back to where we were yesterday.
It sounds like you have fire BARRIERS not fire WALLS.
If you have fire walls, each building will be zoned SEPARATELY
If you have fire barriers, they do not impact the zoning.
Does anyone else are with this statement?
Verify which of the walls you have otherwise we'll all continue to
run in circles. Tag, your it.
Roland
On Mar 10, 2008, at 11:12 PM, A.P.Silva 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
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