Distance below ceilings for concealed space protection

[UFT12]

Appreciate the help on the following.

per NFPA 13 (not NFPA 13R), do the rules about maximum distances below ceilings for standard spray sprinklers, either for obstructed or non-obstructed construction, apply the same way when talking about protection inside concealed spaces (i.e. above false ceilings)?

 

[cdafd]

I would say yes

But. Follow the listing/ data sheet for the specific sprinkler

 

[TravisMack]

There is very specific criteria for concealed combustible spaces. Be sure to follow all of that and you are good. But yes, generally the 1-12" down for unobstructed or 1-6" below the beam to a max of 22" below the deck. However, if specially listed sprinklers are required, you will need to follow that criteria specified in the data sheets.