Heat and cold can't see through black plastic. It makes the pipe
invisible to fire and freezing. ;)
One possibility is that they are going to insulate over the pipe and it
would make it easier for the insulation to lay on top of the plastic
instead of between the pipe and the rafters. Only prob
Check out TOLCO products. They have an array of seismic bracing
options.
One problem is the possible liability involved when someone says "they
want something but it doesn't have to be listed", is whether you can
assure them that the product used outside of it's intended purposes will
actually pe
In plumbing systems you can have water hammer due to the quick on-off
action of valves. You typically don't have that in sprinkler systems.
Usually sprinkler flow would start with one head flowing or a nozzle
opening. That won't create the kind of quick on-off action which would
result in water h
If all this is typical for sprinkler systems, would one think the NFPA
committees or FM would have addressed the issue due to historical data
revealing system failures or damage from "water hammer" or hydraulic
shock? While we can pontificate until sunrise and beyond, I can't find
any directive t
When he made that statement did he direct you as to what would be
acceptable to him?
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL PROTECTED
You can't just wire a flow switch to a bell. You have to have a power
source first of all and how would that be supervised in compliance with
NFPA 13 or 72? I would ask him to show me the section of NFPA that
gives me direction on how to hook it up that way.
Craig L. Prahl, CET
Fire Protectio
Ah yes but then couldn't we have the same issue as the AHJ is concerned
about, a non-annunciating alarm? If it's not supervised there's no
guarantee that it's functional at the time of operation.
If I didn't have a fire alarm system I would definitely install a WMA.
Also we don't know if th
Based on the original text, the AHJ wants the flow switch hardwired to
the bell. No interconnection between the FS and FACP is mentioned.
Based on that concept you could easily have a non-annunciating system
that sounded no alarm anywhere.
This is his concern with using the FA system for notifica
I can hear her e-mail box filling up from here. LOL
This is just typical. We've had situations like this in our area, not
once did any reporter ask about fire protection or sprinklers when the
building went BOOM! Most likely they weren't present or weren't
operational. But they did ask like 10
WHAT?! How dare they interrupt the business of Santa for something like
a fire alarm! I am shocked and appalled!
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax -
Is your building code seismic analysis stating you need EQ bracing?
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL PROTECTED]
http://www.lg
Couldn't find anything specifically discouraging us from exceeding 140%
except for this:
"A.5.8 The performance of the pump when applied at capacities over 140
percent of rated capacity can be adversely affected by the suction
conditions. Application of the pump at capacities less than 90 percent
o
One possibility in the differentiation of classifications between the
two is the presence of equipment. In a restaurant you have people
seated at tables, not much else there. In a casino there is a lot of
electrically operated equipment, extra lighting, more activity. Plus if
people lose a lot t
Sorry, I said supply but meant supply pressure. Something which we are
speculating on since it wasn't specifically mentioned anyway. We got
off tangent onto two different avenues. Pick, pick, pick,
pick ;)
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lo
Ah yes, the Chinese, best counterfeiters in the world. If you make it,
they steal the design and remarket it at less than half your price
before you can yell PATENT INFRINGEMENT! ;)
I wonder if they copied the UL and FM markings on the deflector as well?
But at least they are "springklers" of
Composition of computer parts varies by mfgr. You could find anything
from ABS to Polystyrene to PVC, but they all fall in the Group A
category. One other component of some computer plastics as well as
various other electronic equipment are Brominated Flame Retardants -
found on printed circuit b
Roof members are generally designed for support of the roof as well as
predicted dead load weights for snow, (where applicable) lights,
sprinkler piping, and other utilities. It all depends on the facility
and what is factored into the design of the roof support system. It's
pretty much a given
Dead load is the fixed (non-moving) weight supported by a structural
member. Live Load is the weight of items that can move. Dead load is
piping or lights, live load is people or fork trucks and such.
It is common practice for our structural group to design the roof
support system for additional
In a recent project we had an existing bldg. which had 28ft high
double-row racks in a 35ft high bldg. I don't know what they stored on
the racks when the bldg. was occupied but anyway, the bldg did have
ESFR, K14's in it. Our new client was going to be dividing up the bldg
with one half being a
I doubt that this is the only Chinese company doing this. So vigilance
is still necessary. Plus I wouldn't be so willing to trust the word of
a company that produces counterfeit products based on pirated
technology. I wonder if they even knew what UL stood for when they
copied it to their sprink
Yes I certainly did.
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL PROTECTED]
http://www.lg.com
-Original Message-
From: [EMAIL PR
As a contractor I've usually seen sch. 10 grooved piping for anything
above 1". But it seems most AE firms are specing sch 40 threaded for
anything below 2.5". Now this is for the average project with no
special requirements.
When I've asked why, there is no real answer other "than that's what
w
Matt, does the lower cost of the thrd. Ftgs offset the cost of labor for
threading pipe and installation?
I wouldn't groove 1", we never did, but 1 1/4" and up we preferred sch.
10 and grooving.
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 Intern
Matt,
Congrats on finishing up your therapy! LOL Thanks for the input.
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL PROTECTED]
http://www
George, what in the difference between an SR and QR makes you say that
the SR won't provide much "Life Safety"? How much difference in
response time can you measure between the two?
Quite honestly the smoke detector in the room will be the thing that
saves the life of the occupant more so than
Richard the rolled vs. sq. cut has to do with the pipe schedule. Our
practice was Sch. 10 is rolled, sch. 40 is cut.
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Well I can see that happening in some cases, guess it depends on the
type of incident, fuel loading and such. But if the sprinkler goes
first at the elevated temperature, that's not much use to the occupant.
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Green
Unfortunately in the industrial realm, sprinkler systems are often
reluctantly looked upon as a necessary evil. They don't produce any
revenue and as far as most clients are concerned they aren't really
needed because they've never experienced a fire in any of their other
facilities. But they mus
Chris, I'll take your word for it. (Although I'm a bit disturbed at you
and Matt's repeated setting of things on fire.) LOL
But I'm sure there are variations in conditions such as flaming fire
versus smoldering fires where results may differ.
Anyway, I think we've fallen off the original path
Not trying to disagree with you Bob. I'm sure there are stories which
support the importance of each piece of equipment over the other when it
comes to saving lives. Just depends on who's telling the story. Both
items are important and neither should be discounted in any way.
Craig L. Prahl,
Joe I think you missed my intention. (Oh and BTW, I started this topic,
so I know what the original question was) If a client wanted or required
sch 40, I make sure I knew that before bidding and I would make sure
they closely examined all bids to assure that everyone bid apples to
apples.
I've
I had been told by one elevator inspector that there was an FM approved
hydraulic media that was non-combustible and if that was being used the
sprinkler in the pit could be deleted.
On the other hand in another jurisdiction I was told that regardless of
the hydraulic media used that we were to
Right on George! It would be better to provide something that some
might consider extra then to leave it out since it's in a gray area.
That way if you are ever asked if you did all you could have, you can
say without reservation, "yes we did".
In construction it's all about saving money, an
High powered sprinkler system? Drowning? Please!!!
Ignorance reigns once more!(Sigh.)
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.
Because water faster than 20fps can quickly get out of control and drown
people in nursing homes. Slower water is less threatening.
But seriously, why place a limit of 20? There are times that through a
particular section of pipe where the velocity may exceed that. It makes
little sense to have
That would most likely depend on the contracting laws of your state or
municipality. In our state in order to perform fire sprinkler tests or
inspections you have to be a licensed sprinkler contractor. In order to
hold that license you have to have a full time NICET level III or IV in
Sprinkler L
Steve, for an alarm contractor to operate valves without knowledge of
what they do would be self-imposing a lot of liability. But as you say,
it obviously happens.
In our area if an alarm contractor is testing devices attached to or
related to the sprinkler system, we were called out to "operate
Chris, Kansas isn't alone on that. I have a project in a nearby state.
The owner wanted to do the installation himself. He has mechanics that
know how to use a pipe wrench. (this guy wanted a detail on his
drawings of how to install an upright head, yes we are in
trouble...)
Anyway, when I
Roland, not in our state. An unlicensed owner is limited when it comes
to sprinkler installations. He can do small alterations and repairs but
not a full blown system install. Not saying that some don't do it all
themselves. If no one is looking over their shoulder, who's to know.
But you can u
If it's not UL listed in the USA, can you legally use it at all? I
think it would be difficult to verify any installation against the NFPA
13, 8.14.1.2.10 criteria.
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spar
John, I believe what you said has merit to a point. I believe that
every inspection should entail more than just ringing the bell.
Unfortunately that's all a lot of owners want to pay for and that what a
lot of inspectors do. It's a fast easy way to make a buck.
The inspection should point o
Well at least no one drowned. ;)
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL PROTECTED]
http://www.lg.com
-Original Message-
F
And this comes back to the question being discussed in another thread, Who
approved something like that?
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599
Calculated and reality, HUH? Are you not using the actual available
flows and pressures? By giving yourself a 10% or 10psi cushion in your
calcs you're not creating some mysterious concoction of a system. Not
sure what you think is happening.
Craig L. Prahl, CET
Fire Protection Group
Mechanica
Help me out here, while limiting those two items may seem well and good,
I fail to see how limiting the pipe velocity to 20fps will extend the
life of a sprinkler system. This is not like a plumbing system where
water it flowing constantly. In the typical 50 year lifespan of the
buildings you kno
Sometimes when you've been in the construction/engineering business for
a long time it can sure be a detriment to your viewing pleasure.
Was watching the movie Changing Lanes, with Ben Affleck and Samuel L.
Jackson when what do we come to, oh yeah you can probably guess, the
one sprinkler trigger
Good to hear the sprinklers did their job and it's refreshing to see a
well written report of the incident. Someone should get an "attaboy"!
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
These are the ones by Gateway Tubing? We had used them several times on
tenant upfit projects. No real issue with them, very quick and easy to
install and gave the client some flexibility should future upfits occur.
These are only good for lay-in type ceilings so if you have hard
ceilings, you ca
Jim In a perfect world that might be the case but in actuality, the
majority of bid projects come with a line on some architectural plan
that says "Provide sprinkler protection per NFPA 13 for our highly
experimental, top secret, intergalactic, space fuel project" and that's
all you get.
What yo
You cannot internally sprinkle the POD units. If you haven't seen them
they are for lack of better description, a shipping container. Similar
to what you see on ocean going freighters. Those are much larger of
course but same basic principal. They are designed to be dropped off at
your house an
One other issue, it depends on which "POD" you are talking about. The brand
name "POD" is of a different construction than the so called pod storage units
that Home Depot handles.
I wonder if POD corporate headquarters would happen to have some fire
protection guidelines for warehouses stori
The biggest problem with interior fire protection of a POD is that you
have no assurance that the thing isn't packed wall to wall and floor to
ceiling. The sprinkler won't do any good when stuff is jammed up
against it. Also, no guarantee that the sprinkler wouldn't get damaged
or broke off altog
A project we had a few years ago entailed sprinkling below a deck at a
local Sports Bar. The construction was pressure treated wood, ranging
from 2ft to about 4.5ft above asphalt pavement. The local Fire Marshal
required the sprinklers below because he said that there could be trash
accumulation
8.14.6 could definitely be used as a guide and if his deck could meet
the criteria of 8.14.6.2 then he wouldn't have to sprinkle. But most
decks won't meet #3 in that list since decking boards can be 1/8th inch
or more apart, the AHJ may not consider that "tight construction".
Craig L. Prahl,
It sounds like NFPA 13 (2002) 8.14.1.2.2 could apply to your situation.
If that's true then no sprinklers would be required.
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4
Sounds like an angry tenant beating the daylights out of a sprinkler
with a broom handle. "Yeah I was uh, like uh, cleaning, yeah that's
what I was doing officer".
But agreed, discharge from ONE or TWO sprinklers traveling 20+ floors
and FLOODING the building?
I'm just glad no one drowned bec
If you have to turn sideways to get into the room, a firefighter in full
turnout gear won't be able to get in. If you have a local fire marshal
that reviews and approves installations the owner might be in for a big
surprise if he rejects the installation just before they expect to
occupy the faci
The presence of a return air plenum doesn't automatically necessitate
sprinklers. Sprinklers are going to be required in the space if combustibles
with ratings equal to or above that which is allowed for a concealed space are
present as defined in NFPA 13.
If it is a plenum it may actually be
There's the issue, the ceiling in question wouldn't be considered a floating
cloud, (my point), with just small openings for return air.
I envision the floating clouds as those panels scattered throughout an area
intended for acoustic absorption or architectural flavor but not necessarily
atta
So would it be "almost protected". lol
And let's not go any farther with the "qualifications" thing.
Time for a new topic...
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Di
You need to provide a bit more info. When dealing with storage occupancies you
need to clarify what is being stored, how it's being stored (racks, shelves,
bins, on floor, pallets), in what type of container (box, crate, tote, jars,
etc.), encapsulated, heights of said commodities, etc.
Once y
And that's where it's going to be because if it's just ceiling sprinkler
coverage, OH is OH and EH is EH regardless of the occupancy. So there's no
reason to repeat the info specifically in the storage section of 13 when the
limitations of the specific sprinkler type and spacing is listed elsew
If he's unsettled over the issue I'd tell him that since 231 and 231C were
incorporated into 13, then all the related information of 13 now becomes
intertwined with what used to be in those other documents.
There's not much more you can do.
Craig L. Prahl, CET
Fire Protection Group
Mechanical
What are you trying to protect from what?
Not sure what kind of pieces are going to be burped up by the BFP?
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax
The location of those are often dictated by the Water Department. Have they
offered any opinion or requirement?
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax -
Have you considered a depressed slab/sump with a vertical turbine pump
arrangement instead of tanks?
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
Interesting since NFPA 13 A.5.6.3 (2007) lists foam mattresses (in finished
form) as a Group A Plastic. Box springs which are mostly wood and metal as
Class III.
I would consider the foam in the sofas and probably lean toward classifying
them the same as the mattresses.
They probably looked a
I hope he specified more than just ESFR. Did he give you any specifics or has
he left the selection of pressure and K-factor up to you? Depending on the
water data and what is chosen you may or may not need a pump. Hopefully he gave
you recent water information so you don't have to guess.
ESF
If you read the definition of expanded and exposed you could say that a foam
mattress with the cloth coverings MAY be considered as being Exposed.
(definition of exposed in 3.9.1.10, 2007) since the cloth covering could absorb
water...
BUT
the addition of the plastic bagging of the items takes
Oh this scenario gets sooo old.
With the recent discussions concerning the response time of certain types of
smoke detectors it is very likely that the valve would never be actuated in
time for the sprinklers to do anything. Is he willing to take that risk? Can
the valve be supervised by
Oops, sorry, my mistake. I forget.
lol
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL PROTECTED]
http://www.ch2m.com
-Original Messa
I think Tyco's version is called Sapphire, same thing just different name
basically.
But it's not a dry chemical, it's a highly atomized, non-conductive, liquid,
discharged at very high pressure.
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 Int
Chances are his reaction was more due to toxic gases and smoke released from
the burning material than from the FM-200. Remember furniture can have foam
plastics, and other materials that release several different toxic gases from
the burning process.
I wouldn't walk into a fire scenario witho
Is that a water mist system?
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL PROTECTED]
http://www.ch2m.com
-Original Message-
From: [
headed your way via e-mail
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL PROTECTED]
http://www.ch2m.com
-Original Message-
From: [EM
You've got a bunch of issues there.
Pipe under buildings: check NFPA 24, 10.6.1 PIPE SHALL NOT BE RUN UNDER
BUILDINGS.
There is some allowance when it can't be avoided as listed in 10.6.2.
Can the pump room be accessed directly from outside? Is there any way to
service or even remove the pu
The requirement of a backflow assembly depends on your water supply connection.
If you are getting your water from a municipal supply then you will have one,
(as opposed to drawing your fire water from a private fire water storage tank).
Any AWWA approved assembly is what is being referenced.
Well you know how it goes, what may be acceptable to one AHJ may not be to
another. But regardless, their acceptance still doesn't make it compliant with
code.
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartan
We had similar discussions with a client on a very large automotive project.
The Underwriter was directing them to provide automatic sprinklers in the data
center control rooms, they wanted nothing or at best FM-200 alone. The
Underwriter had discussed business interruption with them and aske
What is the AHJ's definition of this space? Is it a room or an equipment
enclosure?
If it's an equipment enclosure, then the min. door hgt. would have no bearing.
You also then have to look at the requirement of sprinklers within an equipment
enclosure versus in an occupied room.
Crai
we're all at the beach on vacation, sorry. catch ya when we get
back..
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL PROTECTED]
Sorry, what can I say? ;)
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL PROTECTED]
http://www.ch2m.com
-Original Message-
From: [
I've done some queries but haven't got much to go on. Basically due to tight
controls there are few news worthy computer/control room fires. Those that do
occur usually don't make the news just because they aren't all that dramatic.
http://www.highspringsherald.com/articles/2007/03/01/news/news
Why would people still be in the room while the FM-200 is being discharged?
There will be alarm notifications before this occurs to warn them of the
discharge, they should be vacating the room.
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 Int
If in fact it is a requirement by the employer/owner that personnel remain in
the room when a system discharges someone needs their head examined.
If the system is in discharge mode it is likely there is a fire scenario
occurring, what imbecile would require his employees to "go down with the sh
What type of storage does NFPA 101 not require to be sprinkled? The building
code requires sprinklers for some depending on the commodity stored.
How can an aircraft be considered a low hazard commodity?
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1
Ask them to give you a copy of the referenced section. You shouldn't have to
go on the hunt.
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL
An NFPA 16 foam water system would be a better choice than low expansion foam.
Check NFPA 30, 16.4 and then go to NFPA 16.
Per NFPA 30, in rack sprinklers for foam-water systems are installed per NFPA
13 criteria.
Low expansion foam won't help you when it comes to racks. Check NFPA 11 for
low
It would seem out of place for the fire department or AHJ to take design
authority over a project unless they are willing to stamp drawings and be
totally responsible for that design. It would be appropriate for them to make
suggestions and recommendations like an Underwriter would but not perf
NFPA 85 has a lot of verbiage concerning coal bunkers. But there's not a lot
if any fixed fire protection involved. Prevention and suppression is mostly
controlled by various procedures and operational methodology. Check it out.
Also might look at NFPA 120, FMDS 6-24(Coal Pulverizers and Pulv
Yup, part of the electrical code. See Article 505 to start for descriptions of
classified areas. If the hazard present warrants, the electrical devices and
components must be rated.
Somewhere along the project the electrical engineers will do a hazardous
location plan and identify the areas w
Here's a pic from NFPA 70, 516. 3 foot bubble outside the doors as has been
described.
[cid:873540416@16092008-0B36]
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
8.15.2 says if they are non-combustible or limited combustible, non-accessible
that they don't require sprinklers.
Where the confusion in that? Hopefully they are non-accessible otherwise you'd
have prisoners up in the attic, right?
When you say shaft, what it the purpose of the shaft? How b
Does he reference a particular code requirement?
Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL PROTECTED]
http://www.ch2m.com
-Original
Look at NFPA 13, 2007, 8.5.7, he may be looking at this as if it is a ceiling
pocket. But in any case I couldn't find reference to a skylight smoke detector
requirement unless it's being used for smoke control.
The following excerpt is from the IBC, 2006 limiting the allowable area but
also gi
This one of those situations where people don't think the whole process all the
way through.
VESDA is a great system, very expensive and quite often overkill unless you
have a critical operation with a lot of sensitive data and no backup. (High
Value data centers should ALWAYS have a backup sy
Ok, need some help here, if the accelerator trips doesn't that usually mean
there is an open pipe in the system usually indicating a leak or open head?
The accelerator is there to aid in quicker dissipation of air in the system to
allow the dry valve to open within the required time period. I
Thanks,
Based on the detailed description it sounds like the accelerator alone can not
trip the valve. That actuation has to be a result of loss of air pressure in
the system as said before. The loss of system pressure will allow the
accelerator to do it's job which is to decrease the amount
The Tyco head is specifically listed to provide protection equivalent to a two
hour rated assembly. So if the corridor is a rated exit corridor then you need
to use the Tyco head to maintain the integrity of the separation. There is no
equivalent rating for sprinklering a window with just an a
Be careful, if the AHJ approves something that is an incorrect application as
you suggest, you share responsible for the incorrect application too, not just
him. Make sure that what you choose meets code and is correct for the
particular situation. Can you defend your installation or design be
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