Cluster bomb indeed Exterior projection is starting point. 30 ft is mighty deep but since metal the mesh drives the combustibility issue. IF that qualifies as limited-combustibility, then what is the fuel load beneath it? The annex allows some chairs and tables but again 30 ft deep is concerning since there can be a lot. IF protection is needed by the AHJ for either of the above, you then are into the activation question. Although air will move through small mesh, I suspect a high volume of fast moving air (fire plume and ceiling jets) will resist moving through it (unless it melts into a big hole). IT depends on the material and the size of holes. NADA on how big for hole size but mesh is tiny and the typical open ceiling panels were something like 1/4 of an inch wide (and the depth must be less than that).
ALL decisions for the AHJ since nada in 13. As Allan lightly touched, a compensatory measure could be sidewall sprinkles along the building. Closely spaced is desirable but not critical. Roland 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 Jun 26, 2018, at 7:18 AM, Travis Mack <[email protected]> wrote: > > Yes, I agree it is getting confusing. > > There is a “trellis” structural frame that is made of hollow steel structural > members. > > There is a “mesh canopy” that stretches over this trellis type frame. > > We have been trying to get data on construction material and percent opening. > > I don’t have the drawing open at this time. The structure butts up against > the main building and extends out about 30’ from the building in the West, > north and east. It wraps around a section of the building. > > Travis Mack, SET > MFP Design, LLC
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