Bullseye
We IGNORE walls unless rated and using the room design approach is the starting
point
Roland
Roland Huggins, PE
Senior Vice President, Engineering & Technical Services
American Fire Sprinkler Association
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> On Jul 10, 2019, at 10:17 AM, Sean.VanGaal <[email protected]> wrote:
>
> Do what Mike said but pick up the 12th sprinkler off the 4th line. I would
> imagine the intent of NFPA 13 was to calculated 4 sprinklers on a line as
> your worst case scenario to prove the line size. Then pickup 12 sprinklers
> total to get an appropriate total flow. So the standard reference 3 lines to
> do this as that is the common scenario.
>
> Applying this assumption to your scenario, your 1st two lines have at least 4
> sprinklers per line so those are easy enough. Your 3rd line only has 3
> sprinklers so pickup all 3 and then pick up the 4th sprinkler on the 4th
> line. You now have 12 total sprinklers flowing, and the last 4 of these
> sprinklers are going to overflow more than they normally would if they were
> on a single line (assuming tree/end fed system). So this should be a more
> conservative design than what NFPA 13 requires. But you also aren’t forcing
> yourself to go ultra conservative by calculating 5 or 6 sprinklers on a
> single line which I do not believe was NFPA 13’s intent.
>
> Thanks,
> Sean VG
>
> From: Sprinklerforum [mailto:[email protected]
> <mailto:[email protected]>] On Behalf Of Brian
> Harris
> Sent: Tuesday, July 9, 2019 7:44 AM
> To: [email protected]
> <mailto:[email protected]>
> Subject: [EXTERNAL] RE: ESFR Calc's
>
> Mike-
> The lines on the other side of the wall only have (3) heads per line.
>
> Brian Harris, CET
> BVS Systems Inc.
> bvssytemsinc.com
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__bvssystemsinc.com_&d=DwMFAg&c=wn3mZQLIuInh2ClcJ0_DIA&r=XSIweKhAHHhyB-d63TCLaTQ55VHpbhIhFOxEPFjbNpg&m=AWdzKMSnfZTO1yzpl1Dd37Lrr1TeI1Fqx3BWjEHd-Zg&s=QGuUWxAksuh7c7L6oHoglZLzKjOOXn6OYIs8o4Fgsv4&e=>
>
> From: Sprinklerforum <[email protected]
> <mailto:[email protected]>> On Behalf Of Mike
> Hairfield
> Sent: Tuesday, July 09, 2019 10:36 AM
> To: [email protected]
> <mailto:[email protected]>
> Subject: Re: ESFR Calc's
>
> Why don't you use 2 lines on one side of the wall and 1 line on the other
> side of the wall thus 3 lines with 4 heads?
>
> Mike
>
> From: Sprinklerforum <[email protected]
> <mailto:[email protected]>> on behalf of Brian
> Harris <[email protected] <mailto:[email protected]>>
> Sent: Tuesday, July 9, 2019 10:29 AM
> To: [email protected]
> <mailto:[email protected]>
> Subject: ESFR Calc's
>
> I have an ESFR system that I do not have (3) rows of (4) heads to calc. Due
> to compartment wall layouts I have (2) rows of (6) heads and (6) rows of (3)
> heads. What is the best way to grab (12) heads?
>
> Brian Harris, CET
> BVS Systems Inc.
> Design Manager
> bvssystemsinc.com
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__bvssystemsinc.com_&d=DwMFAg&c=wn3mZQLIuInh2ClcJ0_DIA&r=XSIweKhAHHhyB-d63TCLaTQ55VHpbhIhFOxEPFjbNpg&m=AWdzKMSnfZTO1yzpl1Dd37Lrr1TeI1Fqx3BWjEHd-Zg&s=QGuUWxAksuh7c7L6oHoglZLzKjOOXn6OYIs8o4Fgsv4&e=>
> Phone: 704.896.9989
> Fax: 704.896.1935
>
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