With only 20' storage, you have 1000 gpm. The ESFR system will be 1250 gpm so 
it should just be better or equal. 

As long as water supply can handle the extra 250 gpm then it should be good. 

Travis Mack, SET
MFP Design, LLC
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Sent from my iPhone

> On Sep 18, 2016, at 7:03 PM, 321 <tcf...@bellsouth.net> wrote:
> 
> Thanks Travis...great suggestion. I'll run the Calcs again and get a price on 
> the 11.2 Dry Pendents. I'm laid out at 100 sq ft so design changes will be 
> nil on drawings. I'm curious to see what my main and line sizes will be...I'm 
> 4-2-4 now so it should be close.
>  
> Atlantic Realty and Building, LLC
> > Palm Beach Gardens, Fl
> > 561-707-5150
> > 
> > John W. Farabee
> > V.P. Fire Sprinkler Division
> > 
> 
> 
> 
> 
> On Sunday, September 18, 2016 5:39 PM, "Travis Mack, SET" 
> <tm...@mfpdesign.com> wrote:
> 
> 
> You are talking Class IV to 20'.  I assume double row racks, 8' aisles, 
> non-encapsulated.
> That is 0.495/2000 for ceiling only sprinklers.
> If you max out at 100 sq ft, you are basically 50 gpm / sprinkler.
> If you use the 11.2 dry pendent sprinklers, you will have a starting pressure 
> of about 20 psi.
> Calculate 20+ sprinklers.  The demand should be between 1000-1100 gpm.  You 
> will need 500 gpm demand in lieu of the 250 gpm demand for ESFR.
> Your water supply seems strong enough to deliver 1500-1600 gpm with the pump 
> you suggested.
> That would give you the wet system, dry pendents, and the 11.2 dry pendent is 
> less cost than your 16.8 dry ESFR
> Travis Mack, SET
> MFP Design, LLC
> 2508 E Lodgepole Drive
> Gilbert, AZ 85298
> 480-505-9271
> fax: 866-430-6107
> email:tm...@mfpdesign.com
> 
> http://www.mfpdesign.com
> https://www.facebook.com/pages/MFP-Design-LLC/92218417692
> Send large files to us via: https://www.hightail.com/u/MFPDesign 
> LinkedIn: https://www.linkedin.com/in/travismack
>> On 9/18/2016 2:11 PM, 321 wrote:
>> Thanks Guys for all of the responses. This will shed some more light on this 
>> project:
>> 
>> Four weeks ago we didn't know this project existed. At the request of the 
>> owner we took on a "Cost Plus" project management arrangement to attempt to 
>> inject some sanity into the process.
>> 
>> The building is a Rigid Frame Steel Building...already built. There are 
>> about 54,000 square feet of coolers/freezers inside the building...90% built 
>> out. There is a remainder of 20,000 square feet of office and loading dock. 
>> The original conceptual design was                   nothing more than "Dots 
>> on a Page" and a note calling for an ESFR Antifreeze System. There is a 
>> preliminary rack plan but the Coolers may only be partially racked...rack 
>> height 20'...inside height of coolers is 26'. We have a few areas that we 
>> can raise pipe above the ceiling of the coolers and distribute pipe.
>> 
>> My initial concepts allows for 20' of storage in rack of Class IV utilizing 
>> ESFR 16.8 heads with a starting pressure of 35 PSI spaced 10 x 10 flowing 12 
>> heads...no in rack required (Florida is still using NFPA 13 2010 edition). 
>> Water supply is 58/54/1150...I added a 1000 GPM @ 100 PSI pump. If I run a 
>> wet grid I can get a 10 psi safety factor using ESFR's dropping thru the top 
>> of the cooler. I priced the ESFR 16.8 Heads and the owner was...well "Blown 
>> Away".
>> 
>> So now I'm comparing alternative concepts to compare costs. I don't want to 
>> sprinkle the racks because I can't tie down where they will be or how many 
>> there are. My main concern with the wet pipe overhead concept is the 
>> challenge of working in about 5 feet of clear space over the coolers along 
>> with distributing the pipe after lifting it up through a few 
>> openings....very labor intensive.
>> 
>> I thought about the SIPA because it has fewer restrictions on 
>> ara/gallonage...allowing up to 1000 heads. The 30% requirement for area 
>> increase on PA systems may kill that idea. Straight up Dry Pipe with the 
>> gallonage limitations and maintenance issues may prove to be logistically 
>> impractical.
>> 
>> The panels are 6" thick but may not be substantial enough to hold the weight 
>> of pipe and water.
>> 
>> At this point...I'm not seeing enough reason to change from my initial 
>> concept of wet pipe overhead with dry pendent heads.
>> 
>> Thanks,
>>  
>> Atlantic Realty and Building, LLC
>> > Palm Beach Gardens, Fl
>> > 561-707-5150
>> > 
>> > John W. Farabee
>> > V.P. Fire Sprinkler Division
>> > 
>> 
>> 
>> On Sunday, September 18, 2016 3:02 PM, Bruce Verhei <bver...@comcast.net> 
>> wrote:
>> 
>> 
>> What is the structure of the freezer? Are the racks integral to that 
>> structure, or free standing? Could you support system from racks? 
>> 
>> Best
>> 
>> Bruce Verhei
>> 
>> Go 'Hawks
>> 
>> 
>> 
>> Sent from my iPhone
>> On Sep 18, 2016, at 10:13, rongreenman . <rongreen...@gmail.com> wrote:
>> 
>>> For once we have s post where a double interlock pre action is actually the 
>>> proper system and our fellow forumite wants to use a single interlock. If 
>>> you use a SIPA you'll have ice in your pipes before a head fuses. A DIPA 
>>> WONT FLIW Wter into the piping until sprinklers are fused. 
>>> 
>>> On Sunday, September 18, 2016, 321 <tcf...@bellsouth.net> wrote:e 
>>> I have a very large Freezer/Cooler project that I am managing. My initial 
>>> idea on this job has been to use a Wet Pipe System above the Freezer with 
>>> ESFR Dry Pendents (Class IV in rack to 20'). Due to the exorbitant cost of 
>>> the ESFR Dry Pendents I'm letting my thinking expand to possibly running 
>>> Single Interlock Pre Action inside the Freezer ...since the Freezers are 
>>> already up (yeah...I know !!).
>>> 
>>> The ceiling panels are 6" thick and I was wondering if any of you guys in 
>>> your history have ever hung Fire Sprinkler Pipe inside a Freezer attaching 
>>> to/thru the panels and how?
>>> 
>>> Thanks in advance
>>> 
>>> Atlantic Realty and Building, LLC
>>> Palm Beach Gardens, Fl
>>> 561-707-5150
>>>  
>>> John W. Farabee
>>> V.P. Fire Sprinkler Division
>>> 
>>> 
>>> -- 
>>> Sent from Gmail Mobile
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