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Lowering a Ceiling Box attached to an Adjustable Fixture Bar Hangers

Lowering a Ceiling Box attached to an Adjustable Fixture Bar Hangers

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  #1  
Old 08-23-14, 04:55 PM
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Lowering a Ceiling Box attached to an Adjustable Fixture Bar Hangers

I have several ceiling boxes that were not installed flush with the drywall.

The front edge of the 3.5” octagon boxes are about 1” from the finished surface of the ceiling.

The boxes were mounted using Adjustable Fixture Bar Hangers, but I don’t think the installer compensated for the ceiling’s strapping nor the thickness of the drywall.

Here is a picture of the Adjustable Fixture Bar Hanger.

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Anyone have an idea how I can get the boxes flush with the finished surface of the ceiling without removing the hanger?

Unfortunately extension rings seem to only come in 1.5” heights.

Ideally, the extension rings would have worked and I could have fixed the problem without unwiring everything. I’m afraid unless I can find a 1” extension for a 3.5” octagon box it is just not possible.

I’m thinking I need to put something between the hanger and the box to lower it, but I haven’t been able to come up with a method.

Anyone know what the threading on the center of the hanger bar corresponds to?

Any help is appreciated.

Thanks!
 
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Old 08-23-14, 05:04 PM
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  #3  
Old 08-23-14, 06:05 PM
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The threaded stud looks like the old style that held the box through the center knockout.

Since the box extension is too deep I think you may want to see if you can find a deep fan rated box or do drywall work.
 
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Old 08-23-14, 06:39 PM
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Why do you need box flush with drywall? Although ideal, it's not necessary.
Any fixture (or light mounting bar) you want to mount will still fit. If the mounting screws for fixture are not long enough to reach box, replace them with longer #6-32 machine screws.
The important thing is that the drywall was not cut out too much around box and whatever you want to mount to box has a place to grip drywall.

Mod Note: the box can be setback no more than 1/4" from a non combustible surface and flush or project from a combustible surface.
 

Last edited by pcboss; 08-24-14 at 05:40 AM. Reason: added note
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Old 08-23-14, 09:01 PM
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I was under the impression that the box needs to be flush to comply with 314.20 of the NEC.
 
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Old 08-23-14, 10:43 PM
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Yes.... you are correct. The box needs to sit flush with the surface of the sheetrock or a box extender or some other approved device needs to be used.

The Arlington BE-1R is the ideal solution to your problem. It allows for up to 1-1/2" of protection. The extra 1/2" in your case just slides into the box.

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Old 08-24-14, 05:55 AM
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Many Thanks to johnsc and PJmax for suggesting the box extender! It is exactly what I was looking for! Should have know Arlington would have something!

Thanks Again!
 
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