Look on the bright side here Steve- if the AHJ declares it Ord Haz II,
you could spec high temp, standard response heads, and the successful
contractor can finally use those old pendent heads that've been taking
up shop space.
Is EVERYTHING ever finally said about ANY sprinkler code issue? :
one of these days: .008 GPM per sq.ft. per feet ceiling height over
entire STAGE-FORM area, (1) 1.5" hose valve w/30' hose and
extinguisher in cabinet centered on back wall, intermediate temp,
standard coverage, QR heads.
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for the same reason we do not want to screw a dry pend into a 1" C.I.
90 looking down, we should not screw a dry pend into a 1" pipe-o-let
looking down--the top of the dry pend does not make it above the
bottom of the pipe so after the hydro water sits on top of it and if
it freezes it beco
well... i'm not a lost cause yet. i'll give it some more thought. thanks.
Quoting Roland Huggins :
I was hoping I'd be able to convert you :)
The question of the most demanding would be WHICH cross main you
drop the rectangle on.
Roland
On Aug 23, 2012, at 1:48 PM, Brad Casterline wrote:
search this forum for 'calcium chloride'- there are issues with that
too i know, but nothing that could not be resolved. the reason you mix
it slowly is bcoz heat is generated, which tells me we "pre-combust"
it. with a pressure tank as the approved water supply, bfp's, tapping
fees, etc go
the old.edu in me suggests putting 1 head in the 47 and calling the
other 2 bathrooms closets.
ps- *persuing, not perusing
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George,
I have never had to, am away from my desk, and would rather not aswer
a question with a question, or be overly general, but I would like to
know the extent of your problem-- how many "risers" (vertical pipes)
do you have to brace? I have to admit I think there is some confusion
on
all i got is some numbers:
27' ceiling height, 9" deflector distance, couch on fire in the middle
of a large, open furniture showroom---
286F, standard response- activation time = 188 seconds
286F, quick response- activation time = 172 seconds
212F, standard response- activation time = 97 sec
!EXACTLY! Ron :)
I never try to predict anything, per se, I try to find the DIFFERENCE
between scenarios, in this case the same Ceiling Height and Heat
Release Rate versus sprinkler Temp and RTI. For a benchmark, I found
the steady state HRR that would activate a 286 SR in ~180 seconds,
wi
In the recent 'Temperature Rating...' post I said:
286 SR, activation time = 188 seconds
286 QR, activation time = 172 seconds
212 SR, activation time = 97 seconds
212 QR, activation time = 80 seconds
This was with a fire directly under the head, with a fire that grew
from 0 to ~1000 kilowatt/m2
Tom, I guess once we equate what goes out of the tachometer with what
goes into the thermometer, the speed does not change-- the magic of
the second law of thermodynamics! (or, as you put it-- 'Pump affinity').
Quoting Tom Duross :
Brad, we measure rpm as a means of adjusting pressures to ra
thanks DJJ8389, that's what I thought. I guess electric motor drive is
more consistent and closer to expectations than engine driven. As far
as Tom's 'adjusting the pressure to rated speed' goes though, with
electric we are at the mercy of the local Power and Light, whereas
with engine driv
Needs 4-6 heads, since it is a mechanical room, Ord. Haz. I.
Non-accesible or limited access relates to FINISH (i.e., non-walkable
ceilings). Walkable ceilings are called floors the next level up by
A.H.Js.
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Sprinkle
George,
78% efficient at overload.. not too shabby!
Do you recall the rated RPM? If I assume a 14" impeller diam. I get 2600 RPM.
I thought about converting the 400 speed reduction to the pump room
temperature rise but said nahhh.. it would be negligible against the
1st law of testosterone, Lo
on 2nd thought (calc), 65-70% is closer, I bet.
78% is 4500 @ 170.
by the way, what does PLD stand for?
Quoting bcasterl...@fsc-inc.com:
George,
78% efficient at overload.. not too shabby!
Do you recall the rated RPM? If I assume a 14" impeller diam. I get 2600 RPM.
I thought about converting t
words vs numbers, 'true' only at the middle of the aisle
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STINKY gets my vote Ron, as most descriptive for some of the numbers I
have posted (the ones that come from the other end of my mouth). All I
can say is excuse me. Today I will model a sidewall sticking out over
a balcony, with and without overhangs and attic eaves, using different
size BBQ
First thing, verify the spelling? If it is pellets, OH2 for the actual
manufacturing area and OH4.5 and double the outside hose for the areas
where they get bunched up awaitng shipment. What are they used for
anyway, sling-shot amo?
Quoting Todd Williams :
Any insight into protecting a w
EH1 pipe scheduled tree system Todd, 17/32, 286, SSU-- over every sq
ft under roof. What normal Sprinkler Contractor includes special
nozzles to guard against auto-ignition in the hammermill? Talk about
shielded! We all need all the work we can get these days. I'm pretty
sure this has worke
i look forward to the day when the east coast and the heart of the
country are once again in equillibrium John. I survived a tornado in
Ruskin Heights Missouri in 1957 so i can ONLY imagine the hardship for
you and yours right now.
Quoting John Drucker :
Great sight yesterday, electrical r
instead of Standard for the Installation of Sprinkler Systems, how
about "Benchmark to Determine Just how far from Reality the Actual
Situation IS from what Is Written Here-In, Now let's See the Numbers"?
Quoting Ron Greenman :
Email needs a "Like" button.
On Sat, Nov 10, 2012 at 6:46 AM,
I know of a contractor that sends an inspection fitter out to inspect
the original installation! this fitter's feet DOES leave the floor,
and scours the Standards for total compliance. This way, if the
original installer loses the I.T,&M, nothing should come back to bite
them so hard they g
the fill line would only have city water behind it, where-as the
metered return would have the fire pump behind it, meaning the metered
return could enter the tank anywhere and still prevail, but there
would be an elevation where the fill would be unable to STUFF more
water in-- interesting
on the other hand, a vortex might relieve pressure on the
circumference. i think it was a matter of like chris said-- a vaccumnn
was drawn, if only for an instant, allowing the weight of the ocean of
air above it to CRUSH it.
Quoting bcasterl...@fsc-inc.com:
the fill line would only have ci
no way Bruce-- impossible to overfill or over-pressurize this type of
water storage tank
Quoting Bruce Verhei :
Or the opposite. Tank provided with in adequate atomospheric
ventilation, overfilled, and pressurized.
But I'd much rather hear from someone who has facts than listen to
my ow
i guess i could run some numbers BEFORE i run my mouth. i think it
imploded as opposed to exploded-- is their any doubt it did one or the
other? i got this weekend off, so i'll give it more thought, including
the doubt.
Quoting bcasterl...@fsc-inc.com:
no way Bruce-- impossible to overfill
The tank did not burst. Tornados do not blow the roof off a house,
even though the news might say it did. A slight atmospheric pressure
difference does phenomenal things to structures. A full and
pressurized (with water) tank would be like a reading at churn. So it
either 'shivered' as Fran
scot,
play like there was not one single control valve in the whole
sheebang, calc every head in the airspace above a certain floor area
untill you find the most demanding (balanced at the ONE common point,
then add 'system control valves based on ease of maitenance :). i
think this is lik
does anybody else find the fact that the floor itself is an obstuction
to pattern development a bit disturbing? at 6 feet between sprinklers
with 7 inch max deflector above the floor, the 'dry spots' are going
to be 2 or 3 feet long!
Quoting rfletc...@aerofire.com:
8.15.6.1 refers to "comb
Perfect examples of the limitations of 13 as a Standard. Question:
Does a 50" sqare ceiling cloud require heads above and below?
Definatley below, but what if the distance from the main ceilinf to
the cloud does not exceed 12", or 22"? For some reason, upon reading
the original post I thoug
none of us likes gray Chris, least of all we engineering technicians,
since our job is to ensure the intent of you EORs and AHJs is APPLIED
to the physical reality of the field. To do this we need measuring
devices (things with numbers on them). But if your intents do not come
with numbers,
Dear @riskmanage,
there is no similar experience: this is a clear case of present/former
drinking buddy vandalism. the report from the municipality is
superfulous (a worker there noticed a spike in usage, shut it down,
drove around town, saw no prob., brought it back up). By this time the
i vote for forgiveness all around, this one time.
Quoting Justin Reid :
And the reviewer stated it as though it was fact. This comment has
the potential to harm this persons ability to conduct business and
make a living. If Steve's remedy is not effective, I would think
this has the potent
I don't get this, Rons. Are you talking about what NFPA 5000 was
supposed to become 30 years ago? That was also the deadline for
converting to metric. But since the American West was not won 25.4
millimeters by 25.4 millimeters, but inch by inch, and most systems
are installed on Earth, we
not messing with you Ron-- i totally do not understand how words can
better describe the built environment better than numbers, i.e.,
Code=Words, Standard=Numbers. i am terrible with numbers, as you know,
and have warned me about (i was an English major when i dropped out of
college), but i
the French invented the System Internationale, and decided MASS would
be their ONE. In English, FORCE is ONE. Since pressure is force/area,
and force is mass times acceleration, and 'most systems are installed
on the Earth', why should sprinks convert?
The beauty of multiples of ten is simply
who's had enough turkey/ham/brisket and specialty dishes for about a year?
"It is what it will be minus what it was."
~~~Brad Casterline, circa 2 months ago~~~
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Hey Vince!
I think the intent of a main drain test is to check the 'status' of
the automatic water supply near the source, at acceptance, and
regulary to catch and unacceptable degradation. I might be wrong
though, since i have only thought that for about 2 minutes so far.
HNY 2 U 2!
Brad
GREAT SCOTT!! i mean, great, scott.
i have to admit i cringed a bit at 5' spacing-- SIX is The Minimum!
but that's when max deflector distance is also in play :)
you have inspired me to post a test question (test because i already
know the answer-- the job went out a couple years ago)
Quotin
?.light hazard, 20x20 cloud, head listed as Quick Response at 20x20,
centered in the cloud.
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beside myself with...
shame-- i mispelled your good name..
please forgive me scot.
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to realize it takes a village to raise a good system. no single pe,
tech, reviewer, installer, or inspector should think they alone can do
that. since humility is an accurate estimate of one's ability and
importance, i think you hit the nail on the head scot.
(r.i.p., the perished, and comfo
I think only horizontal mullions are considered an obstruction to
wetting the glass. Also, in IBC 2013, the sprinkler equivalent for
Fire Rated is no longer approved.
Quoting Rod DiBona :
Pretty sure you do. The mullion acts as a barrier. More than likely
if you present the dilemma to the
I beg the Forum's pardon. I should know better than to post from home
(snow day in Kansas. I have a good memory, it's just short). I think
vertical mullions not being an obstruction makes sense though,
otherwise the listing would not distiguish?
Quoting Justin Reid :
IBC 2012, 703.4
Just
Well.. each mullioned section would mean vertical, since horizontal
are not allowed. This means the water has to run accross the glass,
not just down. I saw the width of it running down, regardless of
vertical mullions as the max horizontal spacing. I think a case for be
made for not needin
Generally speaking, sprinkler flows are in the turbulent range. For a
double suction pump, water splits and enters the impeller eye from
both sides. To avoid uneven wear on the bearings, the velocity at each
side should be equal. Witn a vertical ell, this would be the case. For
a horizontal
I think the most important factor is "Is it an essential facility",
like hospital, fire station, police station, after an event. a
warehouse would not be.
Quoting Ron Greenman :
Hmmm, maybe just my West Coast interpretation. I've never done anything
without bracing. Bracing has always been
I would rather not leave it up to someone to tell me where it would be
required, what with sink holes swallowing men as they sleep, and as
the reward for a nice drive hitting the fairway (the increase in
fracing and the New Madrid fault, etc). I would rather keep it almost
as simple as plan
Ralphy,
I made a spreadsheet a while back to work the Darcy-Weisbach friction
loss formula 'by hand'. The kinematic viscosity is a required input,
and is the absolute viscosity divided by the density. I wanted to be
able to vary the temperature too, and since density is a function of
temp
and p.s. regarding your 'hat in hand' feeling:
"nothing about any of this is easy, and it never will be"
~me~ just now
Quoting bcasterl...@fsc-inc.com:
Ralphy,
I made a spreadsheet a while back to work the Darcy-Weisbach
friction loss formula 'by hand'. The kinematic viscosity is a
require
"-- imagine parallel steel plates 1 foot apart (top and bottom), with
a fluid in-between-- if the top plate is 1 square foot, the viscosity
of the fluid would be a measure of the force required to slide the top
plate with a velocity of 1 foot per second."
Correction: the top plate does not
Ralphy, I predict you will be sizing an expansion chamber soon. Since
chambers only come in so many sizes, and if you are uneasy about what
the maximum static pressure at the chamber might be, you might
consider this:
maximum system static = ((vec - Delta L) * wp) / vec, where:
vec = cham
well--so far, a number for Low Heat Release Rate from NFPA 13, if Low
means Light Hazard, and Light Hazard means .1 GPM/SQ FT: 744 kilowatt
per square meter. The inherent safety factor here is that 100% of the
fuel mass is converted to heat, i.e., not one ash or piece of soot
left over anyw
I will try to type ledgeably using numbers that will leave no doubt.
Before a proposed change proving equivalency can be considered,
equivalent has to be established. I had almost lost hope thinking
proving eqivalency meant first meeting a 3X safety factor, and it
still might-- i still have
NFPA 13:
1) The Red Book
Escutcheon:
1) Canopy, 2) Beauty Ring
Welded, threaded, female outlet:
1) Pipe-o-let
Grooved coupling:
1) Vic, 2) Groover
Drip Cup:
1) Slobber Cup, 2) Dookie
Does that about cover it, or are there any other names for Velocity
Check, Grooved Stubby, etc?
ED? George?
_
1) NFPA 13
a) The Red Book b) ?
2) Welded, Threaded, Female Outlet
a) Pipe-O-Let b) ?
3) Escutheon
a) Canopy, b) Beauty Ring c) ?
4) Grooved coupling?
a) ? b) Vic
5) Dookie 6) Velocity Check 7) Grooved Stubby
8) thru 12) ?
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ROSETTE! a new one on me-- i love it
from down south no doubt?
Quoting drm...@swbell.net:
-Original Message- From: bcasterl...@fsc-inc.com Sent:
Sunday, March 31, 2013 5:40 PM To: sprinklerforum@firesprinkler.org
Subject: sprinkler thesaurus NFPA 13:
1) The Red Book
Escutcheon:
1
new this week:
rosette, mud leg, stub chuck, jodi blond.
still nothing for velocity check...
Mr. Vinning? Vince?
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good question Scot. I only have my '07 on me but I want to read
parameter #2 as "For OH2 and less".
Brad
Quoting "å... " :
2010 NFPA 13
Was it the intention, to the best of our collective imaginations, that
Section 11.2.3.2.3.1 meant to include *both* LH and OH hydraulic design
areas (a
Thanks for this Scot! In pondering this I finally discovered what I
believe is the equivalency and reasoning behind QR Reduction: It
reduces the amount of time the fire department has to respond based on
ceiling height. This makes total sense because the lower the ceiling
the faster the hea
Bruce-
I will go out on a Forum limb here and say regarding control mode of
accidental fires in terms of water application versus burning rate
there is only ONE BUFFER. It is huge, but it is not man-made. Imagine
an abandoned wood shack in the middle of nowhwere, struck by
lightning, non-s
I guess a pdf in a Dropbox is not even really necessary.
What I learned from actually doing the modeling is that a skylight
turns otherwise unobstructed construction into obstructed when the
sprinkler is directly below it-- like Pete cited ~below the main
ceiling like the skylight wasn't the
I would see if the AHJ would consider calcing (2) at each of (11)
levels = 22 + 1 at the peak = 23. This approximates .1/1950. The 2
would be on the 'remote' side from the vertical supply riser.
I envision what is referred to as a Spill Plume fire for calculating
smoke exhaust rates in high r
This would be phenomenally interesting to analyze using all the latest
tools, including but not limited to:
1) FDS
2) any current/familiar hydraulics software (or by hand)
3) Sprink Fdt (sp?).
Brad
Quoting bcasterl...@fsc-inc.com:
I would see if the AHJ would consider calcing (2) at each of (
Makes sense Douglas.
Matt:
Mix - 1964 #8. Needles and Pins - The Searchers:
http://www.youtube.com/watch?v=5rLqPtZUWJI&list=RD5rLqPtZUWJI
Quoting Douglas Hicks :
I don’t know about water, but gas piping is not allowed to have
unions hidden in a wall.
From: Matt Grise
Sent: Tuesday, Februa
I was a nine year old with a transistor Bruce...
imma go all in or fold-- give me a minute
b..
Quoting Bruce Verhei :
Searchers, 1964. I’ll raise you one.
Seekers, 1964, with pipes in lyrics.
https://youtu.be/4mpJYIACehQ
On Feb 13, 2018, at 22:18, bcasterl...@fsc-inc.com wrote:
Makes sens
November 1, 1954 here.
And, actually, I like The Forum most when it is rough and tumble and
rather ugly-- it reminds me of home, so, so far it's been a pretty
good week.
Quoting Bruce Verhei :
I started on Earth in 56.
Sent from my iPhone
On Feb 13, 2018, at 23:21, bcasterl...@fsc-inc.co
Might be a good thing to kick around a little bit!-
Quoting Rocci 3 Cetani :
Currently Brad Casterline is frantically working up a model, give
it a few days and I’m sure he will post a response 😊
Rocci Cetani III, CET
Senior Designer
Water-Based Fire Protections Systems Layout, Nicet Level
I never saw a wall that didn't go all the way down to the floor.
Brad.
Quoting "Mark.Phelps" :
So this minimum space rule applies to sprinklers under soffits and
on either side of a lintel? I guess I have been of the understanding
that this type of obstruction was effectively treated like a w
She's the kind of girl whows not too shy and she can tell lm her kind of guy
Quoting Roland Huggins :
I guess you could call the side of the soffit a baffle but since it
doesn’t extend below the pendent it really isn’t.
Roland Huggins, PE - Senior VP Engineering
American Fire Sprinkler Assn.
D
I would not extend a dry system underground - there's worms and stuff
down there.
B.
Quoting Richard Matsuda :
Since the pipe is running underground, is PVC or CPVC acceptable?
Those are already used for underground piping for free-standing
FDC's.Just trying to think outside the box.rick
Mr Prahl been smokin hot here lately - on fire.
Can I get a witness?
b.
Quoting "Prahl, Craig/GVL" :
40 gallon trash can and portable sump pump with hose to exterior or
suitable drain.
That or bucket brigade. :)
Craig L. Prahl
Fire Protection Group Lead/SME
Direct - 864.920.7540
Fax - 864.
Quoting Matt Grise :
I am also getting phishing notices.
Matt
-Original Message-
From: Sprinklerforum
[mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of
Steve Leyton
Sent: Thursday, February 22, 2018 4:59 PM
To: sprinklerforum@lists.firesprinkler.org
Subject: R
It's probably my dumba$$ fault.
Time for me to unsubscribe.
Later,
Brad.
Quoting Dale Wingard :
Same thing happened to me a couple of weeks ago when I asked a
question. Guessing that is why I didn't get a lot of responses. I
did get 2 emails and 2 phone calls. Thanks Mark and Roland for y
For some reason in Kansas anyway 4" is min. if no hydrant on it-- 6"
if it supplies a hydrant too, as far as i remember.
Brad.
ps- does it really take the moderator over one week to approve an
'unsubscribe' nowadays?
Quoting "Westbrook, Jay" :
See the modification to NFPA 24 in the 120-3-3
Thank you Steve.
(suddenly i feel alive again!)
Brad--
.
Quoting Steve Leyton :
If you unsubscribed because you thought you were the cause of the
phishing advisory, I'm pretty sure it wasn't you.
-Original Message-
From: Sprinklerforum
[mailto:sprinklerforum-boun...@lists.firespri
Oh geez, here we go again.
Now i'll never get to sleep.
.
Quoting Chris Born :
8.5.2.1.1 of the 2016 edition of NFPA 13 covers how to determine the
area covered by a sprinkler. This seems to be pretty
straightforward, but I’ve noticed some strange wording. Consider a
building with exposed
I say a beam only acts like a wall if you can't throw under it, and if
the sprinkler is that close, the heat flow AT THE SPRINKLER, due to
the beam is also OBSTRUCTED... very wall-like behavior.
I could probably dig up some snapshots tomorrow.
Brad.
Quoting bcasterl...@fsc-inc.com:
Oh geez
Quoting David Blackwell :
Yes, it had a sprinkler system, but also multiple fatalities...
"In deadly fire at West Chester nursing home, what went wrong?"
Updated: March 2, 2018 — 4:00 PM EST
http://www.philly.com/philly/news/breaking/west-chester-nursing-home-fire-barclay-friends-sprinkler-d
In other words, if all the ATF is saying is that the fire started
outside on the patio then it did, and the Federal Prosecutors are
moving on to other cases.
If the toilets flushed the water supply for this hazard would have
been enough to smash that fire-- if it had started inside.
Maybe
'what-was-wanting'
the challenge for the 'up-and-coming'
i love you scot
Quoting "å... " :
Consider the waterflow test really was 90 psig static, 20 psig residual and
363 gpm.
If the fire started outside, the elevation pressure loss to operating
sprinklers is minimal (~ 4.5 psig); therefo
So far Bruce, yes.
45 years has not dulled Vincent's sense of humor (my first mentor- he
kept me in stitches while instilling a love for this industry).
This is a test post though -- I unsubscribed a while back- at least I
tried. If it turns out to be like a failed suicide attempt I have to
Does anyone make res heads with 3/4 npt?
If so just replace the heads and let it overflow!
The Standards only spell out minimums.
Brad.
Quoting Dewayne Martinez :
I have a project that was originally designed as a OH II space that will
now be turned into a light hazard residential exposed “lof
I only found one maker of UPRIGHT RESIDENTIAL.
I didn't see the npt, but K4.9 so probably not 3/4.
Would a 3/4x0-2 sprig w/ 3/4x1/2 RC be legal?
Brad.
Quoting Matt Grise :
If the system was previously able to provide OH2, is it a problem to
have over discharge? Could you make sure all of the
Kyle, if there is even a whiff of Residential about the occupancy the
listed res should be used because, along with the quick response, res
heads have a superior pattern, wetting not only the floor but high up
on the walls too (curtains, bookshelves, the curio cabinets full of
Russian Shado
I just know from reading about the earliest development of Residential
sprks it was recognized how important it was to get spray high up on
the wall. So 'superior pattern for residential' and 'far superior
level of protection for commercial' are different pages of the same
book.
(and i mea
It's a head scratcher for sure.
One of those Occupancy Classifications that's hard to pin down with
just words, then apply all the rules that go along with that vagueness.
B.
Quoting "Kyle.Montgomery" :
Well, it does give us something to think about. I wonder, though,
does the residential s
I think the words clean and dirty just refers to the density Steve,
which you need to know to get from PSI to feet of head.
13 uses 62.4 lbs/ft^3 (it's not blatant, but I figured it out by
rearanging other rules).
Define 'algorithm'-- i don't see it in chapter 3...
;)
B
Quoting Steve Leyton
The lab would not even need a biologist on staff Vince!
They couldn't tell you what the C Factor was, but if they could
measure the absolute roughness you could take it from there.
I like Mark's idea of a mechanical tee coupon - send them that and
they can measure the height/depth of the insid
Thanks Ben. I looked at the book and searched through archives and it
turns out the largest room in the thread I was remembering was a hotel
room :)
Brad.
Quoting Ben Young :
Bob, I see where you're coming from with this, but we've seen this in the
past with NFPA (previously doing the 0.10
nothing wrong- with green stuff flying out of a sprinks head bud i
mean bob and ben-jam'n, i hope you know what to do now (i think
'reasonable degree of protection'... is in every ED).
I know if I ever get another Motel 6 I will ask myself, "is this a 4
sprk calc or an 8 sprk calc?"
Brad
Q
Dear Thom, if you have not already, please don't pull the trigger--
according to Roland, if you do it right the process is fully
automatic! I can't understand, after such a nice post, and being in
your position now, why you want to call it quits.
.
Quoting Thom Heller :
Ron, thank you…….
Is the opening required to be 'protected' from a building code
standpoint? If it is, Then you look at the sprinkler rules, such as
less than 1000 s.f.
I hope this makes sense.
Brad.
Quoting JD Gamble :
I have a situation where we have 900sq.ft. vertical opening
communicating between two f
You should probably confirm it with every one J.D. but it seems to me
if separation (protection, enclosure) is not required there would be
no reason to use sprinklers as an alernative for providing that
separation. It's been ten years since I last designed, calcd, and
listed a water curtain
The vertical rules say when using sprinklers as the alternative
something something -I'm away from my desk (so far away at home in bed).
Confirm it! It's why I said, "I hope this makes sense"
Brad.
Quoting JD Gamble :
Does that mean that the vertical rules don't apply for this opening?
Get
Quoting JD Gamble :
"... a draft stop is not a viable solution due to head room "... my
fear is these things being left open in a fire situation".
When I got into fire modeling 12 years ago I did an activation
comparison with and without a draft stop. I was curious to see how
much longer
Does anyone have access to 13 where the water curtain detail still
required open sprinklers (deluge)?
I'm curious if the draft stop is required.
Besides smoke protecting the opening it occurred to me the other day
the draft stop would help form a 'wall of water' by blocking ~9 gpm,
making it
Curiosity Kyle- I'm still stuck in last week, tweaking the vertical
opening discussion, which, I must say, you had an excellent take on.
Thanks, Brad.
Quoting "Kyle.Montgomery" :
Is this just for curiosity, or do you have a project using pre-1969
version of the code somehow?
-Original
Thanks Scott. Yes, that does help zero in on when it went from open to
closed sprinklers.
I've recently modeled activation with and without a draft stop for
3,6,9,12,15, and 18 inch deflector distance, for 135F, 155F, 175F, and
200F Sprinklers 9" from edge of opening splitting the difference
I vote no sprinklers required -- open and noncombustible- the
rockinghorse on a spring is like a newspaper machine - there will
always be just one of them- not one today and twelve tomorrow.
Brad.
Quoting Steve Leyton :
8.15.7.5.
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