NFPA 13 (13ed) section 8.11.5


Is it just me or do these rules seem even more restrictive that ESFR?
There also appears to be some gaps on how to treat certain obstructions.

Here are some of the areas I need some clarification from the forum on…..

8.11.5.2- How do you treat an obstruction >8in but <24in in width with the
bottom of the obstruction located within 24in of the sprinkler deflector?

8.11.5.3.2-. Does this table mean that if my deflector is greater than 6in
above the obstruction bottom the sprinkler must be located at lease 36”
away from the edge of the obstruction?

8.11.5.3.4 – apply this for obstructions located >24in below the deflector
unless they fall under 8.15.5.2.1.3

8.11.5.3.5 – Does this section supersede the requirements of 8.11.5.2.1.3
and  8.11.5.3.4 for anything running parallel  to the branch lines?







Thank you,



Dewayne Martinez
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