Re: Seeking false water flow alarm suggestions

Does anyone have a spare 1" male threaded part for the VSR-ST union? I have access to the rest of the switch, but the part needed to screw into my pipe is missing. On 10/12/2016 10:57 AM, rongreenman . wrote: You'd need a hydro pump to overpressure your system but although your switch is

RE: Combustible Concealed Space-Area Reduction

I was thinking that the standard changed to 60" but I may be mistaken or on another planet. I don't have 2016 in front of me. I know 2013 allows using SSU once it exceeds 36". I'm not sure how the cost compares to QR SSU but I do know that there are sprinklers listed for CCS up to 60" deep

Re: Ordinary Hazard Attic Spacing

To me, Occupied and Used means 'potential for ignition'. This is not yet part of Hazard Classification, but I think it will be in the future. Friction sparks are high on the list of causes of accidental fires, so I see mechanical equipment in attic spaces, with metal fans rotating at high angular

Re: Combustible Concealed Space-Area Reduction

I think he is saying that his concealed space is >36" in depth. If so, then specially listed are not mandated. If so, I have always used the QR reduction for 10' ceiling height in those spaces provided it is a wet system. I have had some AHJs require I go to the floor to get my deck height.

RE: Combustible Concealed Space-Area Reduction

Taylor, I believe you will need to use Concealed Space Sprinklers for that area and will need to calc based on the manf data sheet. Cliff Whitfield, SET President Fire Design, Inc. From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Taylor

Combustible Concealed Space-Area Reduction

Good afternoon forum, I'm looking to apply the remote area reduction per 11.2.3.2.3.1 in NFPA 13 2010 to a floor truss space over 36" using quick response, standard spray sprinklers. Could anyone tell me if my assumptions are right? TAYLOR SCHUMACHER, CET Security Fire Sprinkler P

Re: Ordinary Hazard Attic Spacing

bullseye add NFPA caveat about not being a formal interpretation of NFPA or its technical committees Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org > On Oct

Re: Ordinary Hazard Attic Spacing

I wouldn't lose any sleep over using light hazard if it's a typical wood truss scenario with an airhandler and ductwork in it. 'Unused attics' are light hazard. Does the presence of HVAC / ductwork make it a 'used attic'? "Used" seems to imply occupants have easy access to, and routinely use, the

Re: Ordinary Hazard Attic Spacing

Bloody funny that it is unintentionally limited to Light Hazard since the concerns that triggered this excessively conservative requirement is no different for an OH. I believe it catches 99.9% of the occurrences (except when ignored that is) The real question is why are you calling it an OH

Re: Ordinary Hazard Attic Spacing

Actually the referenced higher design parameters by 8.6.4.1.4 is not predicted upon being a light hazard or an attic (though that are the conditions when it applies). It is for a concealed combustible space. If the area is accessible and used for storage etc, it no longer is a concealed

RE: Ordinary Hazard Attic Spacing

Not much help here, but I try to remember the fact that Hazard Classifications are based on the quantity, combustibility, and heat release rate of the CONTENTS. I think the physical challenge of attic fires are light weight wood construction combined with the acute slopes, fires getting through

Re: Ordinary Hazard Attic Spacing

Opinion: Attics are light hazard but seem to have become something between light and ordinary (probably a good thing). So if it's emptyish it's an LH with the attic modifications. If there's stuff in it that makes it OH, it's OH. Kind of like when does a platform used as a stage actually turn into

RE: Attic Hazard: Light or Ordinary?

Counter intuitive it is. Once we did a core and shell mercantile that had 4/12 pitch wood roof. Did rough-in for OH2. The first tenant that signed up wanted a ceiling changing the attic to LH. The system had to be changed out to meet LH spacing and calc’s. Go figure. Ron F Sent from Mail for

Re: Attic Hazard: Light or Ordinary?

Does it make a difference? And if so, how? I only ask because discussing with coworkers the idea is that any equipment changes an attic from unused to used, so it doesn't qualify as light hazard anymore. James On Thursday, October 13, 2016, Todd Williams wrote: > It

Ordinary Hazard Attic Spacing

This question goes past the one I just posted. This question assumes an attic with mechanical equipment in it is OHI. So, in an ordinary hazard attic, does regular OH design? After all, the increased start pressure only applies to light hazard CC spaces. There's nothing different specified for

Re: Attic Hazard: Light or Ordinary?

It depends. Fuel fired equipment? Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (ofc) 860-608-4559 (cell) via Newton Mail [https://cloudmagic.com/k/d/mailapp?ct=ti=9.1.21=9.3.5=email_footer_2] On Thu, Oct 13, 2016 at 12:09 PM, James Litvak

Attic Hazard: Light or Ordinary?

Would an attic with mechanical equipment in it be considered light or ordinary hazard? ___ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org

Re: SPRINKLERS INSIDE OVENS

I was visualizing circuit board drying ovens but I see other ovens with materials inside that could combust at this temperature. Tyco has a formula for determine how long a dry pendent needs to be to keep from transferring freezing temperatures to a wet supply. Perhaps that can be used to figure

Standpipe supply and interconnection

NFPA 14 (07ed) Section 7.5.1 Where two or more standpipes are installed in the same building or section of building, they shall be interconnected. -*This is the horizontal feed piping shown in Figure A.7.1(a) right?* Section 7.9.2.1 Zones with two or more standpipes shall have at least two

RE: SPRINKLERS INSIDE OVENS

NFPA 86 dictates the types of ovens which require internal fire suppression. There are all kinds of ovens other than just the type for cooking. Craig L. Prahl Fire Protection Group Lead/SME CH2M 200 Verdae Blvd. Greenville, SC 29607 Direct - 864.920.7540 Fax - 864.920.7129 CH2MHILL Extension