The EHG2 is driven per the definition for a SHIELDED fire. The annex defines a 2 car stacker as an EHG2. Thats with CEILING only protection. By using the sidewalls around the car (as used in the UK fire tests) at each level, the idea is that it is no longer a shielded fire. AS such, it’s rather conservative to call it an EHG2. The question to me is not will the discharge help but what is the ACTIVATION potential for the sidewalls. Probably ok but the NFPA 13 TC has not yet evaluated or defined a design basis. Thus it is outside the scope of 13 and a PE should be blessing the design or the jurisdiction should define it (as some have done). I wouldn’t get to hung up on the listing constraints.
Not a formal interpretation by NFPA or any of its technical committees 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 Sep 26, 2018, at 9:14 AM, Mike Stossel <[email protected]> wrote: > > I have a fire subcode official that is requesting sidewall sprinklers to be > located at each level of an automobile car stacker. The car stacker will > have (4) levels of sidewalls located between each car and then an upright > overhead system. They are also requesting that the system be protected in > accordance with extra hazard group II. I could not find any allowance or > sidewall sprinkler that is listed for extra hazard protection. Does anyone > know of a sidewall that is listed for extra hazard? > > Thanks, > > Mike Stossel SET > <image003.png> > 36 Barren Road > East Stroudsburg, PA 18302 > Office: 973-670-2627 > [email protected] <mailto:[email protected]> > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > <mailto:[email protected]> > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > <http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org>
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