Mounting J Box and Fan onto C beam with hole

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Old 01-08-19, 01:38 PM
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Mounting J Box and Fan onto C beam with hole

I have a condo converted from an old factory that currently has a ceiling fan mounted via a hole drilled through a C beam, and with no J box, see attached photos.

My question is, how should I correctly install the fan? Is there a safe way to use the existing hole drilled into the C beam, or should I use a beam clamp? Also should there be a rubber gasket between the J box and beam to reduce vibration?

More info:
  • I have this ceiling fan (Hampton Bay 60 inch)
  • There is power and an outlet near by on the ceiling but no J box for the current fan as mounted
  • C beam dimensions:
    • 2 inch lip (2 inch flange length, one way since its not an I beam
    • About 1/8 inch flange thick increasing to 3/16th inch flange thickness
  • There is a hole about 1/4 inch wide drilled into the center of the C beam (how the current fan is mounted)
Any help appreciated, thanks in advance.
 
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Last edited by gwatts; 01-08-19 at 02:03 PM. Reason: adding info
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Old 01-08-19, 09:44 PM
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Welcome to the forums.

how should I correctly install the fan? Is there a safe way to use the existing hole drilled into the C beam, or should I use a beam clamp?
Neither using the existing hole or beam clamp will yield a correct or safe installation.

I would highly recommend attaching the proper electrical box to the bottom of the C beam with two bolts, nuts and lock washers.

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Old 01-09-19, 12:16 AM
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I'd suggest lock nuts rather than lock washers but that is just personal choice.

 
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Old 01-09-19, 01:21 PM
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Thanks PJmax and ray2047

For the 2 bolts, nuts, and lock washers (or 2 bolts and lock nuts) would I drill 2 new holes through the C beam?

It's a C channel rather than a U channel (angled) so it seems like I'd need to correct that angle

 
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Old 01-09-19, 03:16 PM
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Drill the holes straight thru the metal. Use a good grade of bolt and stop nut.
The nut will sit on an angle.
 
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