I assume it will be tied to the rod when completed?
If so I do not see a problem.
Yes we are in ceiling but no false ceiling required in this roomTaking a closer look at the picture I may amend my 6 ft or less statement.
Could that area be classified as an accessible ceiling after construction so that Exception 4 would apply ?
(In direct answer to your over 6 ft question I would say "securing required" and as mentioned, the plan may be to secure it to the rod. Interesting install and I just realized we might be looking above a ceiling)