I’m not sure there was that much thought put into it since it is mighty difficult to justify the difference. Personally it seems more defensible when water can run down BOTH sides of a 3 ft 11 in obstruction. But it is what it is. It all depends upon whether the TOP of the obstruction is within the 18 inch plane below the deflector. IF it is, then 24 in is the max if it’s not then 48 in.
Roland Huggins, PE - Senior VP Engineering American Fire Sprinkler Assn. Dallas, TX http://www.firesprinkler.org <http://www.firesprinkler.org/> Fire Sprinklers Saves Lives > On Feb 22, 2017, at 9:22 AM, Ben Young <[email protected]> wrote: > > Jeff, one (an AHJ, not me) could argue that this figure doesn't apply since > there's already figure 8.6.5.1.2(c) > > I personally feel that the difference between the soffit that goes all the > way up (as in 8.6.5.1.2c) vs the one shown in A.8.6.5.1.2 is ridiculous, but > at the end of the day, the latter is only in the appendix, not the main body > of the code. > > > Benjamin Young > > On Wed, Feb 22, 2017 at 9:54 AM, Jeff Hewitt > <[email protected] > <mailto:[email protected]>> wrote: > See figure A*.6.5.1.2 from NFPA 13, 2016 > > > > > > > > > > > > > > > Jeff Hewitt, PE, SET, PM.SFPE >
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