We have a project using a deluge water spray system under NFPA 15.
We have installed 4 Fire department connections with 5" Storz inlet. Our client is asking us if the number of FDCs installed is sufficient as mentioned in NFPA 15 Section 6.4.3.3. My question is - how do we know that the number of outlets and size of the fire department connection is sufficient? How is that determined? Thanks in advance. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
9 Comments
Pete H
6/20/2024 06:55:03 am
Take it with a grain of salt, I don't work with NFPA 15 that much but my take is:
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Glenn Berger
6/20/2024 08:09:56 am
The answer to your question is dependent on the water requirements (demand) to the suppression system.
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Dan Wilder
6/20/2024 08:43:54 am
Discuss with the local responding FD as to their SOP/SOG and allowances. I'm not sure if the question states there are 4 separate FDC locations each with a 5" Storz connection (assuming that any single location is sized for the water demand of the system) or if there is a single FDC location with a 4-way 5" Storz connection (less likely but still an option). Ultimately, provide enough connections to meet the flow demand of the system using the allowed GPM allowance based on connection size and the signage for the responding FD to know what they need to provide. Most FD's don't have the ability to discharge more than 2 Storz connections.
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Todd E Wyatt
6/20/2024 09:07:33 am
Per the scoping Code (e.g. IBC-2021), NFPA 15 is not a referenced standard per Chapter 35.
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Todd E Wyatt
6/20/2024 09:08:07 am
REFERENCES
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Todd E Wyatt
6/20/2024 09:10:36 am
NFPA 15-2017
Dwight Havens
6/20/2024 10:04:49 am
I would start with the required flow and pressure to the system
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Jack G
6/20/2024 05:36:27 pm
I m not sure where you are going with this.
Reply
RYAN HINSON
6/21/2024 11:50:25 am
Is your deluge system standalone, or one of several systems fed from a common header? How large is it? Is it inside or outside?
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