Are there more specific NFPA 13 2019 guidelines apart from point A.4.3.6 (9) classifying car stackers with 2 cars stacked vertically to Extra Hazard 2 occupancies?
Shall we apply a 2 levels of sprinklers or just one under ceiling?
I don't see any specific details on this situation per NFPA 13. In my opinion, sprinkler head at ceiling will be used since 2nd level of car lift system is not permanent.
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