Re: [EXTERNAL] Re: Dry Pendents Required in Coolers?

And do forget the 10 year test requirements for dry type sprinklers. The owner will need to cover that expense. John August Denhardt, P.E. Strickland Fire Protection On Apr 2, 2019, at 11:45 PM, Kyle.Montgomery mailto:kmontgom...@aerofire.com>> wrote: Yeah, once you have to decide between bu

Re: [EXTERNAL] Re: Dry Pendents Required in Coolers?

Yeah, once you have to decide between buying 400 pendents or 400 dry pendents, it’s a little easier to find yourself on the unconservative (non-conservative? Liberal?)... the side that doesn’t want to spend that much money. I know that isn’t a popular opinion around here sometimes, but that’s ho

Re: Dry Pendents Required in Coolers?

We see these installations in 40k sq ft areas and more. It is a huge cost impact. John has a great point. But I don’t have the PE letters behind my name so I tend to be a bit on the conservative side. Travis Mack, CFPS, CWBSP, RME-G, SET 480-505-9271 MFP Design, LLC www.mfpdesign,com Send large

RE: Dry Pendents Required in Coolers?

True – the last cooler box I did had over 100 sprinklers and one had over 400 sprinklers. 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 Be

Re: Dry Pendents Required in Coolers?

John, I understand your position, but most of this type of installation I see is 8 sprinklers or less. I don’t think that dry vs standard sprinklers in this type of installation have a significant impact to fire protection. I would prefer to err on the side of caution.

RE: Dry Pendents Required in Coolers?

I fully understand you position but the standard has involved in my opinion. If the piping is not subject to freezing, normal sprinklers and a wet system provide better fire protection for the building and the owner. (My personal opinion) The current NFPA 13s allow it. There is additional l

Re: Dry Pendents Required in Coolers?

There is a magic number of 40degF that shows up a lot in 13 for wet vs dry. I use the same for determining dry pendent vs wet. Under 40degF COOLER, DRY PENDENT. Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (ofc) 860-553-3553 (f

RE: Dry Pendents Required in Coolers?

I have done it many times and never had an issue. I receive a letter from the cooler box stating the lowest temperature the box can reach. In most cases, there are inter-locks to shut down the refrigeration system down if it drops below a preset temperature. Also, cold air does sink. The cos

Re: Dry Pendents Required in Coolers?

I wouldn't. Water begins to expand about 37/38 degrees. The key word is to me is "reliably". There are all kinds of scenarios where that temperature can drop. The standard is set for a generic situation, not a specific one. Also, my own home refrigerator has spots colder than the overall ambient te

RE: Dry Pendents Required in Coolers?

I won’t say that I haven’t seen people do it before. But, I tend to think you are playing a game that could be a hard pill to swallow if you lose on it. I always indicate dry pendents in those coolers. Travis Mack, CFPS, CWBSP, RME-G, SET MFP Design, LLC 335

Dry Pendents Required in Coolers?

2019 NFPA 13: 16.4.1.1 Where any portion of a system is subject to freezing AND the temperatures cannot be reliably maintained at or above 40 degrees F, the system shall be installed as a dry pipe or preaction system. I’m sure this has been discussed before, but the above statement requires two

BFP Forward flow test apparatus arrangement

Does anyone have a detail for a forward flow test arrangement either using a test header or the FDC for around 1000 gpm that they’d be willing to share? Thanks, Craig Prahl | Jacobs | Group Lead – Fire Protection | 864.676.5252 | craig.pr...@jacobs.com | www.jaco