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Old 03-18-2010, 04:15 PM   #1
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Ceiling box support rating

How can you determine the weight an existing ceiling box will support? Is the maximum weight that it can support imprinted on the inside of the box?

I have 2 chandeliers with weights of 10 lbs. and 13 lbs. I would like to use the existing boxes if possible.

Thank you,


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Old 03-18-2010, 04:55 PM   #2
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Mike, Not an electrician but did build my own house, including electrical. I would guess NO, unless you can see how the box is afixed to the trusses(rafters). If it, the box, is just screwed or nailed on one side, chances are that it would be limited as to what it can hold. (a light fixture is okay). If it is screwed up through the bottom (now the top) then there probably is a support piece of 2x4 between the two trusses, which would hold the weight. The box may hold the chandelier "as is", depending on the actual weight, but better to be safe than sorry. The box isn't the issue, it's how it is fastened to the ceiling framework.


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Mike2401 (03-19-2010)
Old 03-18-2010, 07:14 PM   #3
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More than likely whatever boxes you have they will support an 11 or 13 pound fixture.
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