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#55739 - 09/04/05 08:28 PM Distance from sprinkler heads?
bot540 Offline

Registered: 09/14/04
Posts: 177
Loc: Vernon Hills, IL
What is the minimum distance allowed for lights, smoke detectors, ect. from sprinkler heads?
Jesus may have been a capenter,but God was an electrician.Genesis1:3

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#55740 - 09/04/05 08:53 PM Re: Distance from sprinkler heads?
u2slow Offline

Registered: 09/18/03
Posts: 198
Loc: Salt Spring, BC, Canada
IIRC thats a Building Code issue... I think the last job I was on that we had issues, the inspector wanted to see 12" minumum to the edge of the fixture.

#55741 - 09/04/05 10:47 PM Re: Distance from sprinkler heads?
georgestolz Offline

Registered: 06/26/05
Posts: 90
Loc: Fort Collins, CO, US
Check out this thread .

I think the rule of thumb is 3 times the size of the obstruction--so a mushroom five inches deep would need to be fifteen inches from the head.

#55742 - 09/06/05 09:41 AM Re: Distance from sprinkler heads?
George Corron Offline

Registered: 05/16/01
Posts: 728
Loc: Lorton, Va USA
If you can lay your hands on an NFPA-13, you will find your answer in there. No violation on a flush fixture (should not be touching though), and basically the 3X rule is correct except that your need to use the dimension which gives you the greater rating of depth or width.

You will find your dead on answer in NFPA-13, chapter 8, section 8.7

I know that's confusing, but it depends on exactly what you have there. I was looking up the answer for you when my FPE looks over my shoulder, and he came up with the same answer, so maybe for once both of us are right.


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