FM has done limited testing looking at the high ceiling issue for the occupancy hazard approach and has some guidance. It does show that sprinklers activate with fires much smaller than what the models say are required. Guess that's one of the reasons to look at the validated boundaries on models before placing too much faith in their predictions.

Roland

On Jan 16, 2008, at 6:51 PM, Richard Lindner wrote:

How effective are sprinklers located at a ceiling of a 70' high building? The building is metal construction, nothing is really capable of burning. Designing for light hazard. Sprinklers are being provided mainly for life safety. What am I missing (ie it doesn't feel like its going to work).
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