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#171046 - 11/17/07 11:24 PM Fire sprinklers - distance, fire code  
aldav53  Offline
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Joined: Aug 2001
Posts: 545
Chandler, AZ USA
In a commercial Building (a hanger I'm working on) How close can lights or other things be to the sprinkler head? is there a distance below or horizontally? I've heard 18" but it seems like directly below would allow the head to spray out better. Whats the fire code on this?


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#171128 - 11/20/07 11:28 AM Re: Fire sprinklers - distance, fire code [Re: aldav53]  
aldav53  Offline
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Joined: Aug 2001
Posts: 545
Chandler, AZ USA
I believe it's 18"

Last edited by aldav53; 11/20/07 11:29 AM. Reason: add letter

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#171136 - 11/20/07 02:40 PM Re: Fire sprinklers - distance, fire code [Re: aldav53]  
earlydean  Offline
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Joined: Dec 2003
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Griswold, CT, USA
Per 2002 NFPA 13 (the sprinkler code) Table 8.3.2.5(c), 0-250 W light fixture requires a minimum distance of 6 inches from ordinary-temperature sprinklers, and 3 inches from intermediate-temperature sprinklers. Also, 250-499 W fixtures require a clearance of 12 and 6 inches respectively.

Any fixture within the spray pattern would have to be considered in the design by the engineer or certified installer to allow full coverage despite the obstruction.


Earl

#171137 - 11/20/07 02:53 PM Re: Fire sprinklers - distance, fire code [Re: earlydean]  
earlydean  Offline
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Posts: 751
Griswold, CT, USA
The title of Table 8.3.2.5(c) is: Ratings of Sprinklers in Specified Residential Areas. In other than residential situations, 8.3.2.5 requires the sprinkler head temperature rating to be adjusted. Item (6) requires: Sprinklers in unventilated show windows having high-powered electric lights near the ceiling shall be of the intermediate-temperature classification.
To get an answer to your question, you will have to consult the sprinkler engineer or installer.


Earl


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