Any fire is going to start on the floor or table, which is within the
Extra Hazard area. I think you have to do the whole space EH.
At 09:09 AM 4/17/2008, you wrote:
Forum,
Let me know what you guys think about this situation.
I have a college lab building where the AHJ bumped us up to Extra Hazard
Occupancy in the Basement due to storage of flamabile liquids. The labs
in the basement have a 3 foot deep ceiling pocket above the experiment
table in the center of the room. We spaced pendents at extra hazard
spacing throughout the room at the lower ceiling level. We then added two
sidewall sprinklers in the ceiling pocket itself. The question as arisen
whether we can use sidewalls because the room is to be designed at extra
hazard. My therory was that the floor level is protected to extra hazard
from the pendents and the sidewalls are only protecting the ceiling pock
itself and not the room below. Does anyone agree/disagree with my
reasoning.
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Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
www.fpdc.com
860.535.2080
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