I have a project with a workshop space that has a ceiling height of 70-feet from floor level.
How do I approach sprinkler selection & system type for this height?
Does NFPA 13 have a ceiling height limitation?
I see a couple of tables in FM Data Sheets, but is this the only source for protection at these heights?
Thanks in advance.
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8/9/2022 06:31:15 am
8/9/2022 08:35:52 am
I don't recall any limits on ceiling heights for non-storage applications. There are some limitations when dealing with cloud ceiling protection, reduced area, and then also some exclusions for atrium protection (if I remember correctly). I have installed sprinklers in an 80' tall building before and I've seen 100'+ (non-storage) areas with roof level sprinklers.
8/9/2022 08:45:38 am
There are no NFPA 13 height maximums, however I'd consider spacing the heads tighter 100 sqft max and a larger K factor 11.2 or 14
8/9/2022 08:50:19 am
With ceiling heights at this level, I would recommend a fire modeling exercise be undertaken to determine an useable design criteria. Based upon other projects that required a significant clear height, a deluge system was required. We installed several "draft curtains" to limit the size of each system, which cut down the required water flow.
8/9/2022 09:33:02 am
If you can consider it an atrium, atriums over 55ft from ceiling to floor don't required sprinklers. Was looking into this morning for industrial buildings where they combine pieces of ships.
8/9/2022 12:36:57 pm
No height limitation for occupancy hazard.
Dwight H Havens
8/10/2022 08:14:05 am
I go with Glen Berger's comment. What is the minimum fire load necessary to actuate a fire sprinkler at just under 70 feet of height?
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