Does the box on joist in pictures look safe to mount a ceiling fan?

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  #1  
Old 09-03-17, 06:00 AM
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Does the box on joist in pictures look safe to mount a ceiling fan?

Hi,
We moved into a house and the prior owner told us that the rooms had ceiling mount boxes rated for ceiling fans. In 2 rooms it had a metal box and the fans mounted fine.

In the next room, I found a different box made of plastic and partially mounted on a joist as shown in attached photos (half saddle box maybe??). The plastic is cracked.
The 2 main screws where the ceiling fan mount will be attached are drilled through the box, into the joist directly.

Does this look safe to mount the fan? The box is cracked but not sure if joist is supposed to hold the weight.
If it is not okay, what should I do or get next? The plastic box seems to go around and then over the joist and not sure how to take it out as there seem to be no screws. Also avoiding taking it out as it might not be necessary and it crack further.

Appreciate the guidance from the experts in this forum.

Thanks!
AC
 
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  #2  
Old 09-03-17, 07:21 AM
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If the metal box is securely nailed directly to a rafter, then it would be OK. But you should use a fan rated box that uses a brace that spans across the rafters.
 
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Old 09-03-17, 07:27 AM
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Norm, he said that the box was cracked. That makes it worthless.
 
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Old 09-03-17, 07:39 AM
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Missed the fact he said plastic and it was cracked. WOW!
 
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Old 09-03-17, 08:09 AM
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Your box is not fan rated. Here's a link to the retrofit box Shorty referred to:
15.5 cu. in. Retrofit Ceiling Fan Saf-T-Brace-0110000 - The Home Depot
You don't need a larger hole.

If there is a joist directly above the box, you can use a fan rated pancake box like this:
6 cu. in. New Construction or Remodel Ceiling Fan Saf-T-Pan-0103600 - The Home Depot

Mod Note: The box does not need to be fan rated since it does not supply the sole support. The fan is supported by the hardware into the joist above.

In either case be sure to screw into the 10-24 threaded posts and not the 8-32 ears. The 8-32 ears are for covers and lightweight fixtures.
 

Last edited by pcboss; 09-03-17 at 05:10 PM. Reason: added note
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Old 09-03-17, 09:05 AM
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If you have more than two #14 wires at the fan a fan rated pancake box may not have the wire capacity. In that case you could use a saddle box.
 
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Old 09-03-17, 12:20 PM
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The box the OP has is an excellent fan rated box. The two fan bracket bolts go directly thru the box and into the joist. Just change the cracked box for a new one. It would be extremely hard to add a braced box now with the joist in the way.

Ray's full saddle box is similar. Pancake boxes are a a last resort box.
They don't give you enough wiring room inside.
 
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Old 09-03-17, 05:12 PM
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PJ has posted the exact box that was installed.
 
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Old 09-04-17, 12:53 PM
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Good info, I can't say I've ever seen a box like that but I like it...
 
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