We submitted a proposal attempting to get the TC to define how big a gap is too big. We started with allowing no more than 6 inches without sprinklers above the drop ceiling. The ROP meeting is early Feb.

Roland

On Dec 15, 2010, at 12:40 PM, Brad Casterline wrote:

Thom,

I am not as confident as you are about applying FIGURE A.8.15.22.3 to
Jimmy's scenario: in the figure, both ceilings go wall to wall and the fire is not under the low ceiling. This whole above and below 'cloud' subject is more difficult and fascinating than it struck me at first- I am going to model about a thousand different set-ups to see where the heat goes when it
gets above the opening, just to get a better personal feel for it.

Brad


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