Not that clearly stated but here's the NFPA 13 2016 edition
8.6.5.3.1 Continuous or noncontinuous obstructions that interrupt the water discharge in a horizontal plane more than 18 in. (450 mm) below the sprinkler deflector in a manner to limit the distribution from reaching the protected hazard shall comply with 8.6.5.3. 8.6.5.3.2 The requirements of 8.6.5.3 shall also apply to obstructions 18 in. (450 mm) or less below the sprinkler for light and ordinary hazard occupancies. A.8.6.5.3.3 When obstructions are located more than 18 in. (450 mm) below the sprinkler deflector, an adequate spray pattern develops and obstructions up to and including 4 ft (1.2 m) wide do not require additional protection underneath. Examples are ducts, decks, open grate flooring, catwalks, cutting tables, overhead doors, soffits, ceiling panels, and other similar obstructions. On Sat, Jan 28, 2017 at 11:10 AM, John Paulsen <[email protected]> wrote: > I am trying to determine the proper deflector distance from a partition > with the top located 18” below the sprinkler deflector. This is an Ord Haz > Grp II Self Storage facility with standard spray QR Tyco TY-FRB TY3131 > uprights. Sec 8.6.5.2 doesn’t give a table like 8.6.5.2.2 which is for > Light Hazard only. > > > > If I have to space the heads as if the low partitions went all the way to > the deck, I will violate the 6’ minimum rule. What am I missing here? > > > > Thanks, > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler. > org > >
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