RE: Ice Build-up on Linear Heat Detection for Double Interlock Pre-Action Sprinkler System

Could you use a different type of detector near the doors that would be easier to de-ice or more tolerant of ice buildup? Maybe a pilot detector head? It could be changed out more easily as ice builds up. Matt From: Sprinklerforum On Behalf Of Russell Gregory via Sprinklerforum Sent:

RE: ESFR Calc's

If I am following – staying within the walls makes it a ‘room design method’. You can ignore the walls and do an area/density… or stay in the walls, but then it is not technically and ‘area/density’. So yes, but no… If I am following correctly (?)…. Matt From: Sprinklerforum On Behalf Of

RE: Sprinklers in lieu of fire rated assemblies

The concern I have with heat activated sprinklers is not whether they can contain heat for 2 hours; it is what happens right at the beginning of the fire. A 2 hour barrier will also stop heat at zero hours, but a hole will let fire go right through until the sprinklers activate. If the

RE: 13D CAD and Calc Program

We have used progecad – it does work and is cheap, but it can be frustrating. AutoCAD costs a couple thousand dollars more, but if you are planning to use it more than once in a while, progecad can get frustrating and time consuming. Matt From: Sprinklerforum On Behalf Of Travis Mack via

RE: Hazard Group?

Area/density protection for 15' of rack storage in a 17' building for cartoned non-expanded plastic is only .6/2000 (If I am reading the figures correctly). If the water supply could handle it without a pump, a .6/2000 + EH2 system would let them do pretty much whatever they want in the

RE: Hydraulic Calc Phenomena?

I like to look at the flow volume through one side of a line with discharging heads to see what the pressure loss per foot is. Then add the added loss for a very rough idea if there is a major error in data entry (since the computer typically does the math right). If an OH2 system is flowing

RE: 2016 NFPA 13 Reference help

8.7.3.1.6 "sidewall sprinkler shall be permitted to be installed on opposing or adjacent walls, provided ho sprinkler is located within the maximum protection area of another sprinkler." Matt From: Sprinklerforum On Behalf Of Travis Mack, SET, CFPS, CWBSP, RME-G via Sprinklerforum Sent:

RE: [EXTERNAL] FW: Dry Pipe Valve to Wet

Have they ever clarified what kind of “confusion” they are trying to avoid? Is there a difference in how a fire department deals with a wet system vs a dry system? Matt From: Sprinklerforum On Behalf Of Ron Greenman via Sprinklerforum Sent: Tuesday, September 24, 2019 4:08 PM To:

RE: Securing Institutional Heads

We are doing a bank right now and we had to set up for a specialty drilling company to make a hole for us into 3 different vaults. Matt From: Sprinklerforum On Behalf Of Nick Maneen via Sprinklerforum Sent: Wednesday, October 09, 2019 10:49 AM To: sprinklerforum@lists.firesprinkler.org Cc:

HVLS fans in non-storage hazard

Has anyone seen or heard any info on HVLS fans in non-storage hazard applications? We are seeing them frequently in fitness centers and apartment clubhouses, even in some larger loft apartments. It seems like the study that led to the guidelines in NFPA 13 11.1.7 (2016 ed) was based on

electronic PE stamps

for all of the PE's out there (or otherwise certified folks who stamp things): do you use electronic stamps/seals on the documents you produce? The areas I work in accept electronic stamps, but I have stayed with wet stamps and signing by hand due to security concerns. I feel like I am ready to

RE: Fire Pump NFPA 20

If the standard says 'listed' then it has to be approved by a listing agency. The listing agency does not have to be Underwriters Laboratory (UL) - that is just the one that comes up most frequently in the United States. Matt From: Sprinklerforum On Behalf Of Luis Perea via Sprinklerforum

RE: Overhead / Friction Loss

For estimated water volume – 10% to 15% over minimum theoretical discharge (except for dry attic systems with standard spray heads – those can get CRAZY) For estimated pressure loss due to friction – I like the main line estimate that I mentioned previously. The discharge amount is pretty easy

RE: Overhead / Friction Loss

That question could be a little too broad to answer. I usually like to do a simple hazen Williams calc to approximate the estimated waterflow through a ball-park length of main piping. If you can get the water from the source to the fire with some extra pressure leftover, then it might be

RE: Overhead / Friction Loss

...and I mis-read the question... I agree with nick - 15% is a pretty conservative amount that should be attainable. Matt From: Sprinklerforum On Behalf Of Matt Grise via Sprinklerforum Sent: Tuesday, January 28, 2020 1:13 PM To: sprinklerforum@lists.firesprinkler.org Cc: Matt Grise ; Brian

high-pressure, extended coverage concealer

Does anyone know of a high-pressure rated extended coverage concealer? Matt ___ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org

Storage Tank High Level Sensor

I am dealing with an above ground, non-pressurized, water storage tank (full storage, not a break tank) that has a large visible float gauge on the outside, an electronic low water sensor, and an electronic high water sensor. The high and low water sensors are placed so near each other on the

RE: SS Pipe penetration into anechoic chamber friction loss

I suppose you could test the pressure loss through it with a couple of gauges and a pitot tube. Flow your design gpm through it and see how much the pressure drops from one side to the other... or they could pay a lab to do that. Matt From: Sprinklerforum On Behalf Of Paul Cetani via

low flow residential head replacement

We are looking at an apartment complex that was built in the 2000-2001 range using Central low flow k3.0 pendent residential heads. The k3.0's were listed for flow rates that are under .05gpm/sf for 13R applications before the .05 minimum was put into the standard. Some of the sprinkler heads

RE: low flow residential head replacement

rforum mailto:sprinklerforum-boun...@lists.firesprinkler.org>> On Behalf Of Matt Grise via Sprinklerforum Sent: Wednesday, March 11, 2020 12:17 PM To: sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@lists.firesprinkler.org> Cc: Matt Grise mailto:m...@afpsprink.com>> Subje

RE: Curbs for Containment

Last time I had to do it, I got the info from NFPA 30. It took a while, but it is in there somewhere. Matt From: Sprinklerforum On Behalf Of James Crawford via Sprinklerforum Sent: Thursday, April 09, 2020 12:06 PM To: sprinklerforum@lists.firesprinkler.org Cc: James Crawford Subject: Curbs

RE: COVID-19

I think you will need to look at a local level. Our field operations are in one metro area, and we are covered by 8 stay-at-home orders (2 states, 1 city, 5 county) and 3 health advisories. That is in addition to CDC and WHO guidelines. Matt From: Sprinklerforum On Behalf Of Mike Hairfield

IBC 1406.3

This is my first time having this section of the IBC driving the sprinkler requirements - I was hoping to get some insight on what the intent is. We have a 4 story apartment building where we were hoping to exclude sprinklers above the 4th floor balconies - the roof projection over them is

RE: Insulation on Valve Risers

Per NFPA 13 2016 edition, 8.16.4.1.5 – Water filled piping shall be allowed to be installed in areas where the temperature is less than 40 degrees when heat loss calculations performed by a professional engineer verify that the system will not freeze. Is that what you were looking for? It can

RE: Fabric canopies

NFPA 13 2016 8.15.7.2 discusses non-combustible frames covered with inherently flame resistant fabric overlay. Matt From: Sprinklerforum On Behalf Of Fpdcdesign via Sprinklerforum Sent: Thursday, April 16, 2020 8:40 AM To: Sprinklerforum Cc: Fpdcdesign Subject: Fabric canopies I am

RE: Fabric canopies

The text says: “…are constructed utilizing a noncombustible frame, limited combustibles, or fire retardant-treated wood with an inherently flame resistant fabric overlay as demonstrated by Test Method 2…” It seems unlikely that it was the intent of the code language to separate the FRT wood

idle pallets in a 45' building

Does anyone know of a way to protect idle pallet storage in a 45' warehouse? I have not seen listings for any ceiling heights over 40' Thanks! Matt ___ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org

RE: flex heads touching stuff

mailto:sprinklerforum-boun...@lists.firesprinkler.org>> On Behalf Of Matt Grise via Sprinklerforum Sent: Monday, May 18, 2020 3:09 PM To: sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@lists.firesprinkler.org> Cc: Matt Grise mailto:m...@afpsprink.com>> Subject: flex heads

RE: flex heads touching stuff

hat up either, but was easier to comply than to argue. Mike Hill From: Sprinklerforum mailto:sprinklerforum-boun...@lists.firesprinkler.org>> On Behalf Of Matt Grise via Sprinklerforum Sent: Monday, May 18, 2020 3:09 PM To: sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@li

flex heads touching stuff

We received a comment on an above ceiling inspection that flex drops are not allowed to touch anything above the ceiling. I have not seen any information requiring that. Has anyone seen anything similar? Matt ___ Sprinklerforum mailing list

RE: Minimum Lead-in Sizing

The argument of "what is your concern" might work here. There are not a lot of fire marshals that want to be known for killing a development project where there was not actually a problem. Matt From: Sprinklerforum On Behalf Of Travis Mack, SET, CFPS, CWBSP, RME-G via Sprinklerforum Sent:

RE: Minimum Lead-in Sizing

I have seen some water departments that don’t allow new FP taps under 4”. Matt From: Sprinklerforum On Behalf Of Skyler Bilbo via Sprinklerforum Sent: Wednesday, March 18, 2020 1:12 PM To: sprinklerforum@lists.firesprinkler.org Cc: Skyler Bilbo Subject: Re: Minimum Lead-in Sizing Could it

RE: I-B construction - ABS plumbing piping

The NFPA13 annex and handbook address this directly. NFPA 13 A8.15.1.2.1 “minor quantities of combustible materials such as but not limited to cabling, nonmetallic plumbing piping… …should not typically be viewed as requiring sprinklers.” Matt From: Sprinklerforum On Behalf Of Travis Mack,

RE: Code requiring inclusion of possible concurrent flow

Just out of curiosity - is there a need for a code requirement? Is someone arguing that the flush flow should not be included? What is their argument? Matt -Original Message- From: Sprinklerforum On Behalf Of Kevin Hall via Sprinklerforum Sent: Thursday, September 10, 2020 11:55 AM

RE: Self-storage Lockers

stored in plastic containers). Mark at Aero 602 820-7894 -Original Message- From: Sprinklerforum On Behalf Of Matt Grise via Sprinklerforum Sent: Thursday, October 15, 2020 11:07 AM To: sprinklerforum@lists.firesprinkler.org Cc: Matt Grise Subject: [EXTERNAL] RE: Self-storage Lockers

RE: Self-storage Lockers

We just recently had this come up - had to put a head in each one. We drilled a hole from hallway to hallway and stabbed groove weld pipe through there. Then send in your skinniest squirrel to set the coupling, hanger, head, and guard. Matt -Original Message- From: Sprinklerforum On

RE: Self-storage Lockers

u just never know when someone might leave a box of Bic pens in > their locker (Flammable liquid stored in plastic containers). > > Mark at Aero > 602 820-7894 > > -Original Message- > From: Sprinklerforum > On Behalf Of Matt Grise via Sprinkl

RE: Window Sprinklers

I would ask - what would the lower sprinklers do? It seems like higher level sprinklers would go off first and then prevent the lower ones from operating. As you mentioned, they are not listed for that application. I have had the discussion before: If you want a fire rating, and a window, you

Re: ESFR spacing

1aD-LiPlKB5A,,=1> Like us on facebook <http://www.facebook.com/justbeplumb> for updates On Fri, May 29, 2020 at 5:04 PM Matt Grise via Sprinklerforum mailto:sprinklerforum@lists.firesprinkler.org>> wrote: The situations causing the shift are not the same, but would the resulting

ESFR spacing

NFPA13 talks about shifting ESFR heads to avoid obstructions, but is there any concern with moving them when there is not an obstruction (within the spacing rules). We have a situation where a small wall bump-out effectively spaces some ESFR heads over 10', but less than 11' - along with all

RE: ESFR spacing

s On Fri, May 29, 2020 at 4:33 PM Matt Grise via Sprinklerforum mailto:sprinklerforum@lists.firesprinkler.org>> wrote: NFPA13 talks about shifting ESFR heads to avoid obstructions, but is there any concern with moving them when there is not an obstruction (within the spacing rules). We

RE: Covered Parking in 13R

One other thing to watch – if they are considering the S2 and R occupancies to be separate buildings based on a horizontal assembly – IBC 510.2 requires that the lower areas have sprinklers – no NFPA 13 q’s needed. I got hung up on that one recently. Matt From: Sprinklerforum On Behalf Of

RE: Pump Suction Pressure (NPSH)

Or the reading on the pump inlet gauge. Matt -Original Message- From: Sprinklerforum On Behalf Of cliff--- via Sprinklerforum Sent: Thursday, August 06, 2020 11:29 AM To: sprinklerforum@lists.firesprinkler.org Cc: cl...@fire-design.com Subject: RE: Pump Suction Pressure (NPSH)

RE: Pump Suction Pressure (NPSH)

You might ask them why they are asking. Some vendors want to know the estimated max churn pressure to see what type of casing or fittings they will need to provide. Matt -Original Message- From: Sprinklerforum On Behalf Of Brian Harris via Sprinklerforum Sent: Thursday, August 06,

Re: Pump or Fire Pump

what kind of changes are you making to the system? Is this a case where a previously approved application is still approved? Matt From: Sprinklerforum on behalf of Reed A. Roisum, SET via Sprinklerforum Sent: Wednesday, July 8, 2020 10:33 AM To:

RE: Protecting A 500 Degree 12' x 10' Oven

Is protection needed inside the oven? I don't think you are required to put sprinklers inside equipment. Matt From: Sprinklerforum On Behalf Of Mike Hairfield via Sprinklerforum Sent: Thursday, June 18, 2020 11:58 AM To: sprinklerforum@lists.firesprinkler.org Cc: Mike Hairfield Subject:

RE: Uprights in non combustible concealed space

Agreed. You might request a reference to the code that is being enforced. I always say "how can I be sure I am doing it right until you tell me what the rule is? I would not want to accidentally fix it wrong." Matt From: Sprinklerforum On Behalf Of Richard Carr via Sprinklerforum Sent:

RE: Protecting A 500 Degree 12' x 10' Oven

A 500 Degree 12' x 10' Oven Local AHJ is requiring it to be protected. From: Sprinklerforum mailto:sprinklerforum-boun...@lists.firesprinkler.org>> on behalf of Matt Grise via Sprinklerforum mailto:sprinklerforum@lists.firesprinkler.org>> Sent: Thurs

roll paper storage

I am looking at an office supply store that keeps copy/printer paper on shelves. The paper is for wide format printers - on rolls that are about 48" tall x 8" in diameter. The rolls are in bags, two bagged rolls go into a heavy cardboard box. If you have ever had to change the paper on a wide

RE: Fertilizer Storage

It would probably depend on what the fertilizer is made of. If it is ammonium nitrate based - NFPA used to have a code for that , was incorporated into NFPA 400. Matt From: Sprinklerforum On Behalf Of Travis Mack, SET, CFPS, CWBSP, RME-G via Sprinklerforum Sent: Monday, June 08, 2020 10:13

RE: Fertilizer Storage

Don't forget about the fire in West, Texas! "The facility caught fire on Wednesday, April 17, 2013, and roughly 20 minutes after the fire was first reported to emergency dispatchers the site exploded.[21] At 7:50:38

RE: mattress storage

Group A (not 1) Matt From: Sprinklerforum On Behalf Of Matt Grise via Sprinklerforum Sent: Thursday, June 04, 2020 8:32 AM To: sprinklerforum@lists.firesprinkler.org Cc: Matt Grise Subject: RE: mattress storage Usually exposed, expanded group 1 plastic. NFPA 13 and FM have some protection

RE: mattress storage

Usually exposed, expanded group 1 plastic. NFPA 13 and FM have some protection criteria. Matt From: Sprinklerforum On Behalf Of Trillium Fire Sprinkler Design Inc. via Sprinklerforum Sent: Thursday, June 04, 2020 8:00 AM To: sprinklerforum@lists.firesprinkler.org Cc: Trillium Fire Sprinkler

Re: pump suction presure

Minimum suction pressure is usually set by the manufacturer. Most that i have seen require 0.5psi at the inlet flange. You might check with your vendor. Matt Grise Alliance Fire Protection m 913 526 7443 o 913 888 0647 f 913 888 0618 Sent from mobile device Original message

potential freezing in ESFR system

we have a GC who wants to hydro test a pendant ESFR system before they have heat in the building. They want to fill and test during the day while temperatures are over 40F, and then drain the system before it gets cold again. I thought it did not sound like a great idea, but I can't

RE: Domestic Demands 13R

I agree - we are starting to make assumptions about the design basis of the civil/underground water system. 13R 9.6 says "for the building being calculated"- not 'along with all of the other buildings that might use the same underground supply' The handbook goes on to say "If there are

RE: Domestic Demands 13R

What if you just brought in a separate fire line? Then you would not have to include any domestic at all. I doubt that is an option here, but it points out that we were never worried about the domestic demand in the other buildings. Matt -Original Message- From: Sprinklerforum On

schedule 7 pipe?

Has there been any push/interest in allowing unlisted (standard ASTM A53) schedule 7 steel pipe to be allowed by code in place of the listed "flow" piping options? Matt ___ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org

RE: schedule 7 pipe?

ttps://linkprotect.cudasvc.com/url?a=https%3a%2f%2fwww.firesprinkler.org%2fschools.=E,1,qs9LkaxPeR7tDIQVW9-azgrqbr53d67A6UYAwcltYiDIbtUt4GfBVOY5w9T6n83ucR00o4SIsFz_q3_gR4EGrMhmFr-YMwlwqmHdCnLepyggICEUFCpe-zlJxUU,=1 On Wed, Jan 20, 2021 at 10:58 AM Matt Grise via Sprinklerforum < sprinklerforum@l

RE: schedule 7 pipe?

There is no doubt that thicker pipe lasts longer. However, when the owner of a warehouse specifies schedule 7 piping for the sprinkler system in a hard bid, the installing contractor will be using schedule 7. Matt -Original Message- From: Lucas Kirn Sent: Wednesday, January 20,

Re: Stand-Alone UPS protection design

What is the battery chemistry? Matt Grise Alliance Fire Protection m 913 526 7443 o 913 888 0647 f 913 888 0618 Sent from mobile device Original message From: Steve Leyton via Sprinklerforum Date: 1/14/21 12:15 PM (GMT-06:00) To: "Prahl, Craig/GVL" ,

RE: Tissue Paper Wrapped in Plastic

Sorry - just looked at the NFPA 13 criteria for tissue. I don't see any options to fit those criteria. Maybe they could store it in boxes? Have you looked into FM criteria? Matt -Original Message- From: Sprinklerforum On Behalf Of Matt Grise via Sprinklerforum Sent: Monday

RE: Tissue Paper Wrapped in Plastic

Depends on the packaging. If it is in boxes, class 4? If it is loose, then maybe lightweight rolled paper? Matt -Original Message- From: Sprinklerforum On Behalf Of Mike Hairfield via Sprinklerforum Sent: Monday, February 01, 2021 7:30 AM To: Sprinkler Forum Cc: Mike Hairfield

listed pressure relief valve

Does anyone know of a ½" listed pressure relief valve that comes set higher than 175? The brands we typically come across are available in other pressures, but not listed. Thanks! Matt ___ Sprinklerforum mailing list

RE: Distilled Spirits

The production area (distillery) is listed in the 13 annex as OH2. The storage would probably be NFPA 30. Matt -Original Message- From: Sprinklerforum On Behalf Of Travis Mack via Sprinklerforum Sent: Wednesday, February 03, 2021 12:25 PM To: sprinklerforum@lists.firesprinkler.org

RE: Tissue Paper Wrapped in Plastic

resprinkler.org > Cc: Mike Hairfield > Subject: [EXTERNAL] Re: Tissue Paper Wrapped in Plastic > > I just found this in NFPA-13 2013 Table A.5.6.4.1 that Paper products, > uncartoned and plastic wrapped is Group A Plastic Commodities. > > Is this correct? > Mike > &

RE: Fire Flow Test for SFR

We have received requests for Fire Flow verification before. It often happens because the comments are tossed in with our plan review ("be sure the hydrants work!")- or because they contain the word "fire" We charge to perform them and do it under a separate agreement. We don't design or

RE: Corridor issue

What if you replaced all of the corridor heads with QR to use the QR reduction? It might be more cost effective than a major system modification if the calcs don't work for the SR. Also - since the system was approved as-is, is there a concern that it won't work? Matt -Original

RE: Calculating Parallel fire pumps

What is the goal of having 2 pumps? If you want full redundancy, could you just calculate the system one pump at a time? It seems like having them both running would be a better-case scenario that would result in added safety. Are they trying to get by with 2 smaller pumps? I think AutoSprink

RE: Sprinklers in stairways

I think there was a detailed discussion about this in the forum not too long ago if you check the archives. If I recall correctly - the outcome was that sprinklers are required at every level in your situation. The combustible construction requirement was intended to refer to the structure

RE: 13 / 13R IN SAME BUILDING?

It should be possible with the appropriate fire separation. Usually 2hr, but might be more depending on how the lower level is classified. It would likely require a pretty solid dive into IBC (or other enforced codes) and consultation with AHJ. Matt -Original Message- From:

RE: [EXTERNAL] RE: Closets and Clearance from Deflector to Storage

That is a great reason why you want to get your system water tight asap. When a soaked worker comes out of the closet with a soldering torch and a story about a sprinkler that "went off for no reason" - you will have a heads up before you spend hours trying to find an open outlet. Matt

RE: listed pressure relief valve

-DpqYaUm0fLrsvtg_RJskvaFBc36kDABRZ=1 Michael Walters Designer Vulcan Fire Protection 2600 D State Route 568 Carey, Ohio 43316 419-396-3535 Office 419-396-7581 Fax 419-721-4202 Cell micha...@vulcanfireprotection-oh.com -Original Message- From: Sprinklerforum On Behalf Of Matt Grise via Sprinklerforum Sent: Monday

RE: ESFR & Obstruction in Light Hazard

When I run into situations like this I like to do 2 things: 1 - make sure the general building structure (wind bracing/roof steel, RTUs, primary lights, etc.) meet the ESFR criteria so that if they put racking back in, they don't have to re-do the sprinklers. 2 - make sure the owner and GC are

Re: schedule 7 pipe?

IWhNdml9LtBLD7VLKCHJbSbhOS7lIjdmPATqmCJUOtcKtz7l5DL1qTJBWrFoin7dlw1GuEbH-61UkhcEfUDSYe4DNIW3l9Ik2Y1tTsiVNn=1<https://linkprotect.cudasvc.com/url?a=https%3a%2f%2fwww.firesprinkler.org%2fschools=E,1,VNmPvWAFOZM_t0ZIy7l8scFqYk1uyt_n7tBM3UfiadnNtqlgdsTzdYLXL_egc2JCfNtGUShIbSBCDBugHsfglq

flex drops on return bend

I am looking at a library that is protected by a pre-action system with pendants on return bends. I was thinking about using flex drops in the drop portion of the return bend for ease of testing and center of tile. The flex drops are listed for use in dry systems - so I can't think of any code

RE: Question regarding protection of sprinkler heads in Sugar Refinery

When you say product recall - do you mean that the bags might damage the sugar? You could use paper bags also. Matt -Original Message- From: Sprinklerforum On Behalf Of Michael de Gabriele via Sprinklerforum Sent: Tuesday, March 30, 2021 7:28 AM To: JD Gamble Cc: Michael de

RE: IEBC and NFPA 14

I believe that the IEBC references NFPA 14 for how to install standpipes. So it should be followed. How the standpipe is required to be installed depends on who approves the installation. If IEBC is new to an area, it would be a good idea to discuss with the approving authorities. Matt

RE: Best Pressure Loss RPDA

Just to clarify - what flow range do you need for this project? Will this device be required to flow hydrants and a residential system? How bad do you need that PSI? Could you put two BFP's in parallel? You could have a 3" rp that will get you 6psi of loss from 100 to 300, and an 8" next to

RE: Grooved joints in pump suction main

I am not aware of any prohibitions. We use grooved when we can. For whatever reason (tradition?) gate valves seem to always be flanged, so we frequently go flanged just due to availability. Matt -Original Message- From: Sprinklerforum On Behalf Of Steve Leyton via Sprinklerforum

RE: Does a remote free standing FDC require a valve pit?

We have not traditionally added anything. In our experience, the underground contractor provides drainage similar to a dry barrel fire hydrant/ Matt -Original Message- From: Sprinklerforum On Behalf Of Spencer Tomlinson via Sprinklerforum Sent: Wednesday, March 10, 2021 11:37 AM To:

RE: Same size orifice in a room

I don't think you are going to find that. You are not allowed to vary the k-factor along a branch line for the purposes of hydraulic balancing, but the heads do not all have to be the same. FM may recommend against it though - you might check data sheet 2-0 Matt -Original Message-

RE: "Calculating" a Pipe Scheduled system for Backflow Retro

We have done it with a survey and calc of the system. Matt -Original Message- From: Sprinklerforum On Behalf Of J H via Sprinklerforum Sent: Tuesday, April 13, 2021 11:32 AM To: sprinklerforum@lists.firesprinkler.org Cc: J H Subject: Re: "Calculating" a Pipe Scheduled system for

RE: FDC & Pump Suction

If you just cant get the FDC moved, maybe add a pressure regulating valve or relief valve to prevent system overpressure? Not the most-best way to go, but better than blowing the system apart? Matt -Original Message- From: Sprinklerforum On Behalf Of Mike Morey via Sprinklerforum

RE: Standpipe Testing

It might not be a real fast approach, but is there some reason that you could not have the standpipes pressurized to 200 psi before the inspector arrives? We frequently hook up the test pump and then go about moving-off/cleaning up until the little pump reaches the pressure. If you don't have

RE: Old sprinklers

Is there also a stand-alone sprinkler system, or are those the only 4 heads in the building? Matt -Original Message- From: Sprinklerforum On Behalf Of Thomas Reinhardt via Sprinklerforum Sent: Thursday, April 08, 2021 9:05 AM To: sprinklerforum@lists.firesprinkler.org Cc: Thomas

RE: MORE ACTIVITY WEIGHING IN

When I have looked at it (usually for pre-engineered metal buildings)- the lbs/sf is just the weight of the water-filled pipe divided by the are it 'covers'. Similar to the coverage of a sprinkler head. Each structural member then has an allowable point-load formula based on how the

RE: Hotel or Condo

I would imagine that it depends on whether or not the residents are transient. As I understand, the whole idea of the closet exemption for hotels is that someone who is staying for a day or two will not let a closet pile up full of junk. Check the code sheet to see which R 1/2/3/4 the space is

RE: Existing Dry System

separation IBC 707.3.10 Fire wall separation IBC 706.4 On Thu, Feb 4, 2021 at 2:27 PM Matt Grise via Sprinklerforum < sprinklerforum@lists.firesprinkler.org> wrote: > I was thinking that it was 2 hours to be a separated occupancy in the > same building, but 3 hours to be classified

RE: [EXTERNAL] RE: Existing Dry System

One approach that I have seen in a similar situation: If the are not separated enough to classify as 'separated' (2 hr, I think?) then each area must be protected according to the portion that requires the most protection - so 13R for the lower area. Which would basically be 13 for the lower

RE: Existing Dry System

I was thinking that it was 2 hours to be a separated occupancy in the same building, but 3 hours to be classified as separate buildings? Of course, I cant find that code section now Matt -Original Message- From: Sprinklerforum On Behalf Of Kevin Hall via Sprinklerforum Sent:

standpipe protection

2016 edition of NFPA 14 section 6.1.2.2.4 says "where additional standpipes are needed to meet travel distance requirements in non-high-rise buildings, protection of piping is not required." Is that intended to apply to standpipes near horizontal exits also? If they were closer to the stairs,

RE: [EXTERNAL] Conveyors

I have seen it go both ways. Generally in our area, if the conveyors are about waist high, they don't usually need sprinklers under them. Some AHJ's allow/require paint stripes under the conveyors so you can clearly see where you are not allowed to store things. Others require fencing to keep

Re: Transfer Switches

I don't think it would be necessary to connect the fire pump. As Steve mentioned, there could be a lot of factors. But, my first thought would be no. Matt Grise Alliance Fire Protection m 913 526 7443 o 913 888 0647 f 913 888 0618 Sent from mobile device Original message

RE: Transfer Switches

At that point it is probably a discussion to have with your facility insurance carrier... (not that I wouldn't sell them a full diesel motor backup if they asked real nice! ) Matt -Original Message- From: Sprinklerforum On Behalf Of Mark Phillips via Sprinklerforum Sent:

RE: Fire Pump Backflow

For the jockey piping - I wonder if the engineer meant to say that you could pressurize the portion of the piping between the backflow preventer and the fire pump with the jockey pump. Maybe have an additional check valve after the BFP, but before the pump. Then when the pump first activates,

RE: Back Up Fire Pump

It might also depend on the pumping ability of the fire department? How much pump can they drive up with? Matt -Original Message- From: Sprinklerforum On Behalf Of Spencer Tomlinson via Sprinklerforum Sent: Tuesday, September 14, 2021 11:16 AM To:

RE: Flexible hose head connectors on a pipe schedule system

One thought to your point - A 20 foot hard pipe drop has the advantage of also dropping 20 feet. You will gain a substantial amount of pressure from the elevation change that should more than overcome the flow demand of a light hazard pipe schedule standard coverage pendant. A 20 foot

RE: Break Tank

FM also has some guidance in its data sheets. They are more conservative in their design criteria though. Matt -Original Message- From: Sprinklerforum On Behalf Of John Ammeson via Sprinklerforum Sent: Tuesday, October 12, 2021 6:53 AM To: sprinklerforum@lists.firesprinkler.org Cc:

RE: Thread connection holding on one thread only

If I recall from my book-learning days, there is a pretty well established minimum thread engagement that provides the full strength of a threaded connection. (maybe 3?). That may also only apply to bolts though. Matt -Original Message- From: Sprinklerforum On Behalf Of Kevin Hall

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