The NFPA 13 (2019 edition) has got new design for ESFR in-rack sprinklers but i don't see any obstruction rules specifically for it...
So, in this case, should my design follow the obstruction rules of:-
Chapter 9.5 (Position, Location & Spacing for Sprinkler), or,
Chapter 14 (Installation Requirement for ESFR Sprinkler), or
Chapter 25.4 (Vertical Spacing And Location of In-rack Sprinkler) ?
From my own interpretation, ESFR In-Rack sprinkler should fall under "In-Rack" section due to the spacing constraints of installing sprinklers inside racking structure. However, the confusion starts when this is also an ESFR application...
So what do you think?