RE: Hotel washroom & closets

My personal opinion below. I think the intent of the committee is in most transient type occupancies, the fuel load is extremely low. As long someone is only staying in a “hotel” room for less than a month or so, I do not expect the bathroom to be packed with magazines, newspapers, curling

RE: Upright Sprinkler

My take on this issue: For standard spray upright sprinklers, the "Three Times Rule" applies to this situation. However, 8.6.5.2.1.8 states 8.6.5.2.1.3 shall not apply to sprinkler piping less than 3" in diameter. I think the language was changed because the "Three Times Rule" was added.

Re: Quick FM question

Never has been allowed by FM Global. I heard directly from them that they do not believe in the concept. John John August Denhardt, P.E. Vice-President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 > On Mar 3, 2020, at 10:23 AM, Vince Sabolik via

RE: standpipe horizontal exit calculation question

FWIW - That might be Steve’s personal opinion, but I agree with it! Sound solid reasoning. Thanks, John John August Denhardt, P.E. Vice President Engineering and Technical Services American Fire Sprinkler Association 301.343.1457 - Mobile From: Sprinklerforum On Behalf Of Steve Leyton via

Re: NFPA 14 Air supervision requirement

And even when they are exposed, leaks happened all the time. Monitor the dry standpipes. John John August Denhardt P.E. Vice President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 On Jan 24, 2020, at 3:06 PM, Steve Leyton via Sprinklerforum wrote: 

RE: [EXTERNAL] Pipe adjacent to duct

I am unaware of any language that would support the fire inspector’s position. Thanks, John John August Denhardt, P.E. Vice President Engineering and Technical Services American Fire Sprinkler Association 301.343.1457 - Mobile From: Sprinklerforum On Behalf Of Matthew J Willis via

RE: John Denhardt

Hello Ben - I will email you directly. For all - my new email address for my new position with AFSA is jdenha...@firesprinkler.org. I will look forward to talking and hearing from you. Thanks, John John August Denhardt, P.E. Vice President Engineering and

RE: SprinkCAD Standpipe Calculation Results on Installation Plans

Agree. We show the information NFPA 14 requires. Format is not critical but the information must be shown. Thanks, John John August Denhardt, P.E. Strickland Fire Protection Incorporated 4011 Penn Belt Place Forestville, Maryland 20747-4737 301.474.1136 - Office 301.343.1457 - Mobile From:

Re: How are you guys handling calcs for 13R balconies?

That's my point. Calculated the sprinklers that are on any single balcony. If the balconies are continuous, keep adding sprinklers to a maximum of 4 sprinklers. However, if there are separations between the balconies, do not extend just to reach 4 sprinklers. The issue i have is the typical

Re: How are you guys handling calcs for 13R balconies?

In my opinion, only the sprinkler(s) protecting the balcony in question needs to be calculated. 13R is quiet on this subject, but if you look at *7.2.5 The number of design sprinklers for a corridor or breezeway outside the dwelling unit shall include up to the four most hydraulically demanding

Re: low flow residential head replacement

I also recommend contacting Tyco Fire Products for their recommendations. The language of NFPA 13 is as follows: Where replacing residential sprinklers manufactured prior to 2003 that are no longer available from the manufacturer and that are installed using a design density less 0.05 gpm/ft2 , a

Re: Fabric canopies

Fully agree with Matt. John John August Denhardt, P.E. Vice-President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 > On Apr 16, 2020, at 10:14 AM, Matt Grise via Sprinklerforum > wrote: > >  > The text says: > > “…are constructed utilizing a

Re: Fabric canopies

Todd - Look at NFPA 13 -2019 edition, 9.2.3.2. This appears to cover your situation. Hope this helps, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w: firesprinkler.org

COVID - 19

For those that are interested, the AFSA website has some great information for the sprinkler contractors and industry regarding the COVID - 19 issue. The AFSA position is the fire sprinkler industry should be classified as a critical industry under "shelter-in-place" and similar orders. Our

Re: COVID - 19

I had some computer issues last night. I am not sure this message went out. I am sorry if I repeat this email, but I want to make sure all have the information. For those that are interested, the AFSA website has some great information for the sprinkler contractors and industry regarding the

Re: Reliable Model B Alarm Valve

Have you checked with Reliable Sprinkler? John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w: firesprinkler.org

Re: Reliable Model B Alarm Valve

Mike - Reliable Sprinkler will be contacting you with the requested information. Let me know if you need anything additional. John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w:

Re: flex heads touching stuff

effort to comply. > > > > Any idea where it might be written that touching is ok? > > > > Matt > > > > > > *From:* Sprinklerforum *On > Behalf Of *John Denhardt via Sprinklerforum > *Sent:* Monday, May 18, 2020 2:36 PM > *To:* sprinklerforum@lists.firesprinkler

Re: flex heads touching stuff

What I have been taught and read, no sprinkler unrelated material can be supported by the flexible sprinkler drop. The drop may touch other material as long as the other material does not place a load onto the sprinkler drop. Thanks, John John August Denhardt, PE *Vice President, Engineering

Re: flex heads touching stuff

I received this comment directly from Victaulic. I copies the applicable section:: *John is correct in his response, there is no issue or code prohibiting VicFlex from touching another component above the ceiling or the ceiling itself. The question may arise regarding weight/load impact on the

Re: Minimum Lead-in Sizing

As long as you hydraulically calculate the system, NFPA 13 fully allows you to determine the pipe size. As others have said, under 4” in size, other non fire protection systems must be added to the common supply piping. AFSA assisted in this language being added. NFPA 13 - 2016 24.1.3.3 Where a

Re: Boat and RV storage units

Just my gut reaction - EH2 design classification with 286 F standard response sprinkler at the roof. Prefer wet system, 11.2 K sprinklers or larger, pendent sprinklers if possible. John John August Denhardt, P.E. Vice-President Engineering and Technical Services American Fire Sprinkler

Re: [EXTERNAL] Re: Help Finding Code Section

The 2019 edition of 13 has been changed to (*the red bold highlighted text has been deleted*): 9.3.14.3 - Where there is a noncombustible space above a noncombustible or limited-combustible drop ceiling that is sprinklered because it is open to an adjacent sprinklered space *on only one side *and

Re: [EXTERNAL] Re: flex heads touching stuff

gt; across the grid. Then you cannot raise the grid to do any work because > every trade has draped across it. > > > > I assume that there is a similar code reference in the fire sprinkler > code, but maybe not. > > > > Joe > > [image: Image removed by sender.

AFSA Membership

*I want to first off offer a Thank You for all the support I have received in my new position at AFSA.* I can not believe it has already been 8 months. Lots of great things have been happening at AFSA. I love my job! *To all of our current AFSA members -* I appreciate you being a member! AFSA

Re: [EXTERNAL] RE: Ethanol unloading exposure protection

Craig - Great summary! Bruce has a valid point. Ben make sure you are not overstepping your obligations and make sure you are being compensated fairly for this work and the associated liability. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services*

Welcome to the AFSA Technical Service Team - Kevin Hall

I am excited to announce to the SprinklerForum the addition of Kevin Hall to our staff. He will be a great asset to the team. Official Press Release: The American Fire Sprinkler Association (AFSA) is pleased to welcome Coordinator of Technical Services Kevin Hall, P.E., MSFPE, to its Department

Announcement - AFSA President and our AFSA 39 General Session

I am very pleased with this announcement. Congratulations Bob! *The AFSA Board of Directors and AFSA are excited to announce the unanimous selection of Bob Caputo, CFPS, as the association’s President. Caputo’s will begin with AFSA on November 1, 2020. * A link to the announcement on our blog

Re: Submittal Packages

I have seen both. I prefer the entire package. However, I have worked with General Contractors that demand equipment data sheets with 2 weeks of contract award. Engineers - a suggestion: put the requirement in your specification to require a complete package if that is what you want. Thanks,

Re: [EXTERNAL] Re: Submittal Packages

aGT7kLeKIbnZg4TvDPBxUoz195Nl4J%2BkvETIT7u%2F50%3Dreserved=0 > 1041 East Butler Road Greenville, South Carolina 29606 > > -Original Message- > From: Sprinklerforum On > Behalf Of John Denhardt via Sprinklerforum > Sent: Thursday, October 8, 2020 11:32 AM > To: s

Re: ssu - concealed space - small room???

You got it. You must satisfy the definition of small room and my guess is you will not meet the requirements. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w:

Re: Window Sprinklers

Agree 100%. Follow the Listing - period. If an architect or an engineer wants to violate the Listing, let them provide direction and assume all liability. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p:

Re: C-Clamp Hangers

I think Ryan is onto the issue. If it is in the specification, request clarification from the engineer. A large percentage of time, the engineer is not clear enough when the specification is written. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services*

Re: C-Clamp Hangers

Possibly an outdated specification. I have not heard of any issues with properly installed listed C-clamps. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w:

Re: On/Off Switch in the Electric supply to a Dry Pipe System Air Compressor

You are required to have a disconnect switch. What kind of “On/Off” switch are you seeing? John John August Denhardt, P.E. Vice-President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 > On Sep 24, 2020, at 2:50 PM, Mike Hairfield via Sprinklerforum >

Re: On/Off Switch in the Electric supply to a Dry Pipe System Air Compressor

ter, film director, author, actor and opera director > (1942-) > > > On Thu, Sep 24, 2020 at 12:02 PM Mike Hairfield via Sprinklerforum < > sprinklerforum@lists.firesprinkler.org> wrote: > > > Like the one for a light switch, there is breaker in the electrical > > p

Re: [EXTERNAL] RE: On/Off Switch in the Electric supply to a Dry Pipe System Air Compressor

Denhardt > > > > > > Subject: [EXTERNAL] RE: On/Off Switch in the Electric supply to a Dry > > > Pipe System Air Compressor > > > > > > IMHO, yes, it should be. Off the shelf, big box store compressors, > don't last very long costing

Re: FM 8-9

AFSA is trying to schedule a Webinar on this topic. Keep an eye out for this. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w: firesprinkler.org

Re: Hangers for CPVC Pipe going through TGI Joists

Agree - the structure is the support. Restraints or chafing protectuion might be needed. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w: firesprinkler.org

Re: 8.17.5 Hose Connections

In a storage application, hose connections (without hose) are for the responding trained emergency personnel to utilize for "mop up" and if necessary final extinguishment. of the fire. They are not considered as part of a standpipe system. *The above is my personal opinion as a professional

Re: NFPA 13, 2013 ed - hangers and pressures above 100psi

In my opinion, no. The flexible drop assembly is anchored to the ceiling. The point of this requirement is to keep the pendent sprinkler from moving upwards during activation. The flexible drop assembly accomplishes this requirement. Thanks, John John August Denhardt, PE *Vice President,

Re: NFPA 13, 2013 ed - hangers and pressures above 100psi

.@gmail.com > > 253.576.9700 > > The Universe is monstrously indifferent to the presence of man. -Werner > Herzog, screenwriter, film director, author, actor and opera > director (1942-) > > > On Fri, May 29, 2020 at 8:40 AM John Denhardt via Sprinklerforum < > sprin

Re: [EXTERNAL] Re: NFPA 13, 2013 ed - hangers and pressures above 100psi

gt; > > *TOTAL Mechanical* > > *Building* *Integrity* > > > W234 N2830 Paul Rd. > Pewaukee, WI 53072 > > dmarti...@total-mechanical.com > > Ph: 262-522-7110 > > Cell: 414-406-5208 > > http://www.total-mechanical.com/ > <https://urldefense.proofpoint.c

Re: Dust Collection

Now that’s is just funny but unfortunately is sometimes typical for a technical committee. Happy Memorial Day weekend. John John August Denhardt, P.E. Vice-President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 > On May 22, 2020, at 3:49 PM,

RE: [External] Re: I-B construction - ABS plumbing piping

As Travis stated, it is in the works!  Thanks, John John August Denhardt, P.E. Strickland Fire Protection Incorporated 4011 Penn Belt Place Forestville, Maryland 20747-4737 301.474.1136 - Office 301.343.1457 - Mobile From: Sprinklerforum On Behalf Of Travis Mack via Sprinklerforum Sent:

Re: Listed sprinkler guard for horizontal or vertical spray sidewalls

Agree. This forum is a valuable asset. Thanks to all for their contribution. John John August Denhardt, P.E. Vice-President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 > On Jun 24, 2020, at 7:03 PM, Mark Phillips via Sprinklerforum > wrote: > >  >

Re: Ambulatory Health Care protection

Since it is new construction, all light hazard areas must utilize quick response sprinklers. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w: firesprinkler.org

Re: [EXTERNAL] Edge of a platform

I am unaware of any allowances for this situation. However, I like Kyle's thoughts. I would want to see more details but I would consider that approach. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p:

Re: [EXTERNAL] Re: mattress storage

As others have already stated, exposed expanded, Group A, Table A.20.4.5.1. Depending on the storage height, Table 4.3.1.7.1 might be applicable. References are to the 2019 edition of NFPA 13. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American

Re: Structural Load

I agree with Ken. I have been down this road before. The structure needs to support the piping plus 250 pounds at the point of hanging. If the structure can handle this load, then the structure has an issue. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical

Re: stairways & elevators when only the basement is sprinklered

In my opinion, you are looking for direction from NFPA 13 where NFPA 13 is not applicable in this case. Someone has decided to make a partial sprinklered building. That person needs to tell you what sections of NFPA 13 are to be followed or ignored. Otherwise, the liability falls on you. Do not

Re: Exemption for sprinklers

FWIW - Pete works for the Veterans Administration. So NFPA 101 most likely applies. John John August Denhardt, P.E. Vice-President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 > On Jun 2, 2020, at 4:02 PM, Prahl, Craig/GVL via Sprinklerforum > wrote:

Re: Merry Christmas,

Merry Christmas to all my friends. John John August Denhardt, P.E. Vice-President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 > On Dec 25, 2020, at 1:01 PM, Bob Caputo via Sprinklerforum > wrote: > > Thank youSame to you and yours > >> On Fri,

Re: Standpipe signage

On a standpipe system, I always indicate the FDC sign requirements on the shop drawing. I usually just state “CHARGE FDC AT 150 PSIG” unless the system needs more. John August Denhardt, P.E. Vice-President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 >

Re: potential freezing in ESFR system

what would be the point of doing a hydrostatic test and > then replacing all the sprinklers. In a 40,000 sq. ft. system at 100 sq. > ft. per, that a potential for 400 new leaks. > > > -----Original Message- > From: John Denhardt via Sprinklerforum < > spr

Re: potential freezing in ESFR system

Again personally, I would never knowingly put water in a wet piping system unless the "client" can ensure or take responsibility" for any damage due to freezing. Pulling the pendent sprinklers is not a viable option. As a contractor, in almost all cases, our client backed down. In the case when

Re: Clearance around all pump equipment

Others have stated the requirements. I have seen many installations where there was room and the installer did not take advantage of it. Adequate and reasonable space must be maintained to properly inspect, service, repair, and replace all equipment. I always ask, how would I work on this

Re: Domestic Demands 13R

That request is now our list of items to be considered or the 2025 edition of 13R. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w: firesprinkler.org

Re: RV Storage

My suggestions: - RV Storage Building* - Extra Hazard Group 2* - Boat Storage Building (just parked, not on racks) *- Extra Hazard Group 2* - Storage lockers with height less than 12 feet *- Depends on what is being stored. For example, Group A plastics might be more demanding.

Re: schedule 7 pipe?

Keep in mind, NFPA 13 states piping or tubing that meets Table 7.3.1.1 is acceptable. Listing is NOT required. *NFPA 13 - 2019: 7.3.1.1 Pipe or tube shall meet or exceed one of the standards in Table 7.3.1.1 or be in accordance with 7.3.3.* Thus, as long as any piping or tubing material

Re: schedule 7 pipe?

Matt - fully understand the position you have. To answer your initial question specifically, I have heard of *no* push to change NFPA 13 with regard to piping material. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler

Re: schedule 7 pipe?

. > > Matt > > -----Original Message- > From: Sprinklerforum On > Behalf Of John Denhardt via Sprinklerforum > Sent: Wednesday, January 20, 2021 1:30 PM > To: sprinklerforum@lists.firesprinkler.org > Cc: John Denhardt > Subject: Re: schedule 7 pipe? > &

Re: Open Grate Flooring - Calculations

Bill - I agree with Cecil; look at the system as levels. Calculate the system which is most demanding. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w: firesprinkler.org

Re: CPVC EQ Bracing - 2 hole straps and another question

Scott makes a great point. CPVC piping has to be free to move. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w: firesprinkler.org

Re: Area Increases

As Travis stated, slope ceilings are not covered under the protection schemes of NFPA 13 for "Storage". Thus, the increase does not apply to "Storage" unless miscellaneous or low-piled storage applies. NFPA 13 - 2019: 20.6.1 Ceiling Slope. The sprinkler system criteria specified in Chapters 20

Re: Area Increases

ally disclaiming that there's no > consideration given to a particular condition in the standard doesn't mean > that such a condition can't or doesn't exist. > > Definitely my opinion only, > > Steve L. > > -Original Message- > From: Sprinklerforum [mailto: > sp

Re: Tissue Paper Wrapped in Plastic

Following up - the 2019 edition of NFPA 13 has similar language: Table A.20.4(b) Tissue products plastic-wrapped: exposed - Group A nonexpanded Tissue products plastic-wrapped; cartoned - Class III Hope this helps. Thanks, John John August Denhardt, PE *Vice President, Engineering and

Re: Location of hydrant valves in CA.

NFPA 24 - 2019 7.1.1.2.2 Valves required by 7.1.1.2 shall be installed within 20 ft (6.1 m) of the hydrant. 7.1.1.2.2.1 Valves shall be clearly identified and kept free of obstructions. 7.1.1.2.3 Where valves cannot be located in accordance with 7.1.1.2.2, valve locations shall be permitted

Re: Available Pressure from Fire Water Storage Tank

Lots of items to think about. I always recommend using the tank at the lowest available level. - What is the level of the tank before refilled? - Is the tank being utilized for any other purposes. Reminder - account for the friction loss between the tank and the suction side of the fire

Re: 13 / 13R IN SAME BUILDING?

Something to think about Keep in mind NFPA 13R has limited property protection compared to a NFPA 13 system. Can the community afford to lose the use of the firehouse due to a fire which was not contained by a NFPA 13R system. John John August Denhardt, P.E Vice President Engineering and

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

I know this is an old post but Look at NFPA 13 -2019 edition: 19.3.2 Water Demand Requirements — Pipe Schedule Method. 19.3.2.6* Residual Pressure. 19.3.2.6.1 The residual pressure requirement of Table 19.3.2.1 shall be met at the elevation of the highest sprinkler. 19.3.2.6.2 Friction

Re: Sprinkler drop sizing

I know the answer has been given correctly. However, an assumption was made - steel piping. Other materials may be smaller: (NFPA 13-2019 edition) 27.2.1.2 Pipe sizes shall be no less than 1 in. (25 mm) nominal for black or galvanized steel piping and 3∕4 in. (20 mm) nominal for copper

Re: [EXTERNAL] Re: Stub-up Material

Looking at Craig's comments directly, I want to provide some information. *(in blue bold)* 1. Go to the manufacturer's data and see if it is listed to be installed above grade per UL and/or FM as a fire riser. * I am not aware of many nonmetallic underground materials which are Listed for a fire

Re: [EXTERNAL] Re: Stub-up Material

p Lead/SME – Fire Protection | > craig.pr...@jacobs.com | www.jacobs.com > 1041 East Butler Road Greenville, South Carolina 29606 > CONTACT BY: email or MS TEAMS > > -Original Message- > From: Sprinklerforum On > Behalf Of John Denhardt via Sprinklerforum > Sent: Tuesd

Re: Car Dealerships

No other option. 1,500 Sq.Ft. minimum remote area. Any chance adjusting K factors of the sprinklers? *The above is my opinion and has not been processed as a formal interpretation in accordance with the NFPA Regulations Governing Committee Projects. This is provided with the understanding that

Re: Dry System Couplings

As usual, Scott is 100% correct. NFPA 13 and the Listing are minimum standards. An owner, contractor, or an engineer can always ask for higher grade material or methods. I have seen schedule 40 black steel with cut grooves, "flush" type gaskets, 1/2" per 10' of pitch, with hangers every 10'

Re: Manual Dry Standpipe

Fully agree. Interconnection is required. A control valve is required at each stairway riser. Thanks, John > > The foregoing is my opinion only and does not represent NFPA or the NFPA 14 > Technical Committee, nor intended to serve as an interpretation of the > standard. > John August

Re: Slopes / Storage / UFC 3-600-01 change 5

The UFC 3-600-1 requires the storage areas to be designed in accordance with NFPA 13. If under NFPA 13, you qualify for low-pile/miscellaneous storage, the 30% for slope increase is applicable. If you do not qualify for low-pile/miscellaneous storage, a slope ceiling is not allowed. Thanks,

Re: New coil actuators - New standard

Below is the exact language from NFPA 13 -2019 edition: 8.3.1.2.1 Actuator Supervision. Effective January 1, 2021, removal of an electric actuator from the preaction or deluge valve that it controls shall result in an audible and visual indication of system impairment at the system releasing

Re: Type of sprinkler in a Gravity Waste Chute

Interesting questions. I just had this situation a few weeks ago. These are my thoughts. NFPA 13 - 2019 edition and NFPA 82 as referenced in section 26.15 of NFPA 13 does not specify a specific temperature classification for the sprinkler. I would install an intermediate temperature rated

Re: Grooved joints in pump suction main

I have completed hundreds of design, installations, and commissioning with grooved connections on the suction and discharge sides of fire pumps. I never have seen an issue. In fact, I use FxG adapters when I have flanged valves or fittings. I know it probably will not happen during my career,

Re: [External] Re: Does a remote free standing FDC require a valve pit?

inimum and inspect the work (all visible) to make sure there are no leaks. > > Applying that approach to what you described - if the ball drip is the > only thing leaking and the test pressure was never allowed to go below the > minimum, I'd say it passed. > > My thoughts, Scott > > -----

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

I would like to know how contractors are passing the required initial and the periodic NFPA 25 hydrostatic test of the free standing FDC when an automatic ball drip is installed in the underground piping? Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services*

Re: [External] Re: Does a remote free standing FDC require a valve pit?

inlet for every 250 demand. Stuff went south, maybe > southwest. > > -Original Message- > From: Sprinklerforum On > Behalf Of John Denhardt via Sprinklerforum > Sent: Thursday, March 11, 2021 11:11 AM > To: sprinklerforum@lists.firesprinkler.org > Cc: John Denhardt

Re: leaving abandoned sprinkler piping in place

NFPA 13 - 2019 29.2.2 Where all or part of an inactive sprinkler system is abandoned in place, components including sprinklers, hose valves and hoses, and alarm devices shall be removed. 29.2.3 Control valves abandoned in place shall have the operating mechanisms removed. 29.2.4 Sprinkler

Re: NFPA 13 2016 25.2.1.4.2

Please forgive spelling errors, > typographical transgressions and grammatical gaffs. > > ------ > *From:* Sprinklerforum > on behalf of John Denhardt via Sprinklerforum < > sprinklerforum@lists.firesprinkler.org> > *Sent:* Thursday, Ma

Re: NFPA 13 2016 25.2.1.4.2

John - Let's talk tomorrow. I think we can prepare an informal interpretation for you describing the intent of this section. AFSA will be covering Acceptance Testing is some upcoming AHJ webinars. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services*

Re: Check Valve After Flow switch?

I would like to know why this is the "best way" for the installation. I am not stating it is not, just not sure why one way is better especially since we have done it a certain way for years. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American

Re: Hotel or Condo

Absolutely - Closets which are 24 sq.ft. or less in motels and hotels are the exception. Transient occupancy usually means low storage in closets, thus no protection is required. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler

Re: NFPA 13R & NFPA 14

Agree - anything could be possible! But very hard indeed. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services* *American Fire Sprinkler Association* m: p: 301-343-1457 214-349-5965 ext 121 w: firesprinkler.org

Re: [EXTERNAL] Noncontinuous obstructions More than 18" down

My understanding of the standard is no additional protection is needed as long as you have the 18" of clearance between the sprinkler and the top of the obstruction. As you stated, the pattern is developed sufficiently to allow adequate protection since water will be delivered on both sides of

Re: [EXTERNAL] Noncontinuous obstructions More than 18" down

gt; sprinklers, but it would be cool to see some fire modeling or something to > see the impact of these panels on activation time and/or sprinkler > discharge. > > -Kyle M > > -Original Message- > From: Sprinklerforum On > Behalf Of John Denhardt via Sprin

Re: [EXTERNAL] Noncontinuous obstructions More than 18" down

>> nearly 90% of the floor area. I'm not saying that you definitely need >> sprinklers, but it would be cool to see some fire modeling or something to >> see the impact of these panels on activation time and/or sprinkler >> discharge. >> >> -Kyle M &g

Re: Multiple System Calculation

All - For the 2022 edition of NFPA 13, some clarifications and changes are coming for the "Phantom Flow" calculation process. The diagram in the annex has been revised. These changes are still tentative since the NITIAM process is currently occurring. Hopefully, these changes will make it easier

Re: Group III Aircraft Hangar

I fully agree it is the EOR responsibility to identify the hazard (design) requirements. The SFPE's Position Paper 20-1 makes this clear. This position paper was published in December 2020. AFSA is an endorsing organization to this position paper. *4.2.1 Engineering Documents* The Engineer is

Re: [EXTERNAL] Re: Air Venting (2021)

The language in NFPA 13 section 16.7 is an attempt to provide a method to vent some of the trapped air out of the system. At this point, the technical committee did not adapt language to require multiple air vents. In fact, a single 1/2" manual vent is acceptable. The air vent is required to be

Re: [EXTERNAL] Re: Stub-up Material

> craig.pr...@jacobs.com | > https://nam12.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.jacobs.com%2Fdata=04%7C01%7Crhinson%40burnsmcd.com%7C1a13bdae20c7483ae05408d9635e869c%7Cbfbb9a2b6d994e78b3c795005d555c8b%7C0%7C0%7C637650080495691594%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiL

Re: Transfer Switches

A point to be mentioned: a fire pump is only supplied by normal power and if desired or required, "standby" power. "Emergency" power is different. "Shedding" of power is fully allowed with standby power. Thanks, John John August Denhardt, PE *Vice President, Engineering and Technical Services*

Re: [EXTERNAL] Transfer Switches

Slightly off topic - the determination of "reliable" normal power can change with time. Look at the Texas area after last winter. Look at New Orleans after the last 24 hours. Just because an area was served by reliable power in the psat, things do change. Have the engineer of record determine

Re: Transport to Marriott

Uber. Around $15 John August Denhardt, P.E. Vice-President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 > On Sep 17, 2021, at 10:18 AM, Steve Leyton via Sprinklerforum > wrote: > > Is there anyone who has already arrived at the convention who can

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