MORE. 4' (1.2 m) min. aisle width. 3 " (75 mm) min. transverse flue space. 48' (14.6 m) ceiling with 43' (13.1 m) storage. Single-row, double-row, and multiple-row racks in accordance with NFPA 13 Less flue spaces and aisles gives you more storage. See how to do it with Reliable's new N28T3 Specific Application K-28.0 (400) ESFR Sprinkler. reliablesprinkler.com/N28http://www.reliablesprinkler.com/N28