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A parking garage has multiple levels covered by a dry system.
If the floor area of each level is equal to 52,000sf, is it acceptable to protect all levels with one dry system riser? I am referencing the NFPA 13-2016 Handbook Sections 8.2 and its accompanying explanations. Thanks. Submitted anonymously and posted for discussion. Discuss This | Submit Your Question | Subscribe
5 Comments
Dan Wilder
7/17/2020 08:01:31 am
Couple items may prevent this:
Brian Gerdwagen
7/17/2020 12:28:28 pm
If you have floor control valves, yes. But depending on the edition of 13, you need to total the protected floor area. Even 2 stories of 52,000 square feet each would require a floor control for each floor to separate it into two systems. You can still have a single riser, but multiple systems.
Rusty Scott
7/17/2020 12:55:31 pm
Agree with Dan & Brian, the volume of the system will add up quickly and make water delivery and refill times a challenge. Think you're better off splitting each floor up into multiple system for pipe size sake. Also the slope & elevation of the dry system piping will be a concern over 52,000 sq ft system.
franck
7/17/2020 02:04:05 pm
As already indicated by others, but with other words, this would be fine with a wet system (and sectional valves for each floor), even though I would not like it too much for reliability purposes and consequences in case of impairment of one sprinkler riser (PML scenario for some insurance companies in the US).
Nguyen Hoang Gia
8/14/2022 07:13:43 pm
Can interconnect two riser to increase limit area sprinkler bigger 52000 sq? Leave a Reply. |
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