In the 2016 edition of the NFPA 13, Table 13.2.1 in the part of "Group A Plastic Storage", in the paragraph of "Exposed", there is an option of "Expanded" and an option of "Unexpanded and Expanded".
There are two storage arrangements that end up with OH2 with +1 Level of In-Rack (all other criteria are the same):
It seems that the second option will always be better than the first option in reference to the permitted storage height.
Why have the maximum 10 feet storage option if you can always go for the maximum 12 feet storage option?
(Even for a building that is lower than 20 feet, you can go according to the option of storage of 12 feet in a building that is up to 32 feet)
Thanks in advance.
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