|
We have a small dry system of 196 total gallons installed in a small feed/grain storage warehouse at a Tractor Supply store. The dry valve is very close to the unheated storage area. They are using racks with commodity stored up to 15 ft high. This system is well under the 500 gallons for required water delivery time.
Is the Extra Hazard Inspectors test still required with two lines, two outlets on each line, or is a typical Inspectors test for Ordinary Hazard acceptable? I assume the Extra hazard arrangement is still required, but wanted some clarification. NFPA 13 Figure A.7.2.3.7 shows the manifold from four sprinklers and two branch lines. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
3 Comments
Dan Wilder
1/7/2025 07:46:23 am
Technically, as there is no water delivery time to achieve but per 8.17.4.2.1, there still is a requirement for a trip test connection with a simulated single sprinkler orifice. Further detailed in 8.17.4.2.5 (but as the system is below the requirements of 7.2.3.3, the single orifice requirement would apply).
Mike Morey
1/7/2025 08:32:16 am
In the 2022 edition, and I believe similarly in previous editions, you are required to size dry systems by one of four methods as specified at the beginning of the chapter. (60 seconds to inspectors test, no limit for <500 gal, no limit for <750 gal with quick opening device or per water delivery calculations in the following section) The manifold trip test arrangement is to satisfy/prove the water delivery calculation time section. As you're able to satisfy one of the "no time limit" options, you should be able to provide a single head inspectors test to test alarms only is my understanding.
Jack G
1/7/2025 11:03:22 am
The only things left to add , are dwelling unit 15 second trip tests and what is required from the IBC. Leave a Reply. |
ALL-ACCESS
SUBSCRIBESubscribe and learn something new each day:
COMMUNITYTop November '24 Contributors
YOUR POSTPE EXAMGet 100 Days of Free Sample Questions right to you!
FILTERS
All
ARCHIVES
January 2025
PE PREP SERIES |
RSS Feed
