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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
4 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). Leave a Reply. |
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