HomeRefurbers

Ceiling Box + Engineered Joists

« back to Electrical, Wiring & Electronics forum

Topic by Jimi_C posted 09-09-2012 07:18 PM 15111 views 0 times favorited 15 replies Add to Favorites Watch
View Jimi_C's profile

Jimi_C

9 posts in 4019 days

09-09-2012 07:18 PM

I’m trying to install a new ceiling box over my kitchen island, due to the fact that the old box was not flush with the ceiling surface (it was flush with the top of the drywall, so about 1/2” too deep). After pulling the old box out, I saw why – my home was built using engineered joists (I-joists). The builder apparently decided to mount the old hanger bracket slightly above the I-joists bottom flange, so that the brackets on the end were bowed out. The overall result being the box was too shallow.

The replacement hanger I bought is just barely clipping that flange (less than 1/4”), so I cannot expand it without slightly lifting it up. This of course presents issues of its own, since once tipped up a little the “feet” (plastic triangles attached to the bar) no longer make contact very well making it damn near impossible to continue opening up (the triangles have a tendency to tip over, since they’re not making good contact). Also, since the bar would be slightly higher, the box would no longer be flush with the ceiling, which was the original issue I was trying to fix.

I’ve read a few suggestions online regarding how to fix this, but I thought I’d ask here as well. The common solution seems to be to attach plywood above the flange using liquid nails + screws. My concern with this solution is that the bar would be partially touching the flange and partially on the new plywood, so they’d have to be perfectly flush for this to work. The second solution would be to use a 2×4 with a rabbit on it to slip over the flange, so the bar would be making contact only with the new wood (still using LN and screws to attach to the joists). The down side is this is way more complex, and would involve cutting a rabbit in a 2×4 to the correct depth.

Either way, the hole for the light is much closer to one joist than the other, so getting screws into the far one is going to be a PITA.

Any thoughts or suggestions?



View J's profile

J

70 posts in 3028 days

09-09-2012 09:00 PM

Perhaps you should look for an “old work” ceiling box, or an old work ceiling box with a fan support if you are mounting something where weight will be an issue.

Here is a picture of a kit, the rod for spanning the joists operates like a turnbuckle so you dont need to worry about screws in the end or cutting and patching drywall. Install the rod and attach the box with U-bolts, or whatever type of bolts your kit includes.

-- I found the board stretcher... finally!

View MarkTheFiddler's profile

MarkTheFiddler

447 posts in 3055 days

09-10-2012 02:05 AM

J,

I used one very similar to what you showed us it works perfectly.

The thing is, I can’t see how the kit you are showing wouldn’t work because it should hit dead center on the I-Beam. The box would be at the right height.

Jimi,

Are the I=beams a wood product or a plastic product? If so, I believe they sell the brand of remodel brace in J’s post at Lowes. It should clear the the bottom of the I beam and get a really firm grip.

About the 2X4 idea. If you are trying to use celing brace you already own (and possibly can’t return). A table saw would cut the right depth for you in a few passes. That is assuming you have a table saw.

If you are working with minimal tools, I’d say skip the rest of the headaches and get the remodel brace that is intended to sit a little higher than the bottom of the flange and comes with a deeper box. That advice only comes from the experience of trying to make the wrong part work so I can save a few bucks. I think saving a few bucks has paid me about 50 cents an hour.

Best of luck to you and please share the solution that gets the job done.

-- Working on my home for 2 years and counting.

View Jimi_C's profile

Jimi_C

9 posts in 4019 days

09-10-2012 03:13 AM

@J – I am using an old work kit very similar to that, however it looks like that one has a deeper box and thus the feet sit up higher. That might be all I need to get over the lip of that flange, so I’ll look at that one.

@Mark – The joists are particleboard. The old work brace I have was bought at Lowes (or HD, they sell similar stuff). I actually have two – one is a Westinghouse Saf-T brace and the other is Hubbel/Raco. I actually do woodworking as well, so I do have a tablesaw and dado set, so doing a lipped 2×4 wouldn’t be too much of a problem.

View J's profile

J

70 posts in 3028 days

09-10-2012 03:59 AM

In your comment to Mark I see you have the two available options; they should both work. All you need to do is set the adjustable bar at the right height and pick the metal box that meets your needs. It looks like you are there, right at finished.
I hope your project goes well.

-- I found the board stretcher... finally!

View HammerRussel's profile

HammerRussel

1 post in 2744 days

04-25-2013 08:17 AM

I am with J on this one. That ceiling box should work fine to solve your problem. I am not an expert in this, but I had my brother over to help set up the ceiling fan box. Initially, we had trouble because the box was not flushed with the ceiling, but we managed to deal with it. You might need to brace yourself for possible mishaps, our ceiling fan actually fell on us as we were setting it up. Luckily, the blades are made of plastic. But once you are done, you will feel like you have accomplished a great achievement.

View rosstaylor's profile

rosstaylor

518 posts in 101 days

09-30-2020 11:34 AM

Hey – great blog, just looking around some blogs, seems a really nice platform you are using. I’m currently using WordPress for a few of my blogs but looking to change one of them over to a platform similar to yours as a trial run. Anything in particular you would recommend about it?
?????

View rosstaylor's profile

rosstaylor

518 posts in 101 days

10-07-2020 11:15 AM

Hi there, I found your blog via Google while searching for such kinda informative post and your post looks very interesting for me.
??????

View rosstaylor's profile

rosstaylor

518 posts in 101 days

10-13-2020 06:11 AM

What a good blog you have here. Please update it more often. This topics is my interest. Thank you. . .
music submissions

View rosstaylor's profile

rosstaylor

518 posts in 101 days

10-15-2020 10:49 AM

Thanks for writing such a good article, I stumbled onto your blog and read a few post. I like your style of writing…
??????

View rosstaylor's profile

rosstaylor

518 posts in 101 days

10-17-2020 09:47 AM

Thanks for writing such a good article, I stumbled onto your blog and read a few post. I like your style of writing…
???????

View rosstaylor's profile

rosstaylor

518 posts in 101 days

10-20-2020 11:20 AM

My friend mentioned to me your blog, so I thought I’d read it for myself. Very interesting insights, will be back for more!
???

View rosstaylor's profile

rosstaylor

518 posts in 101 days

10-22-2020 01:44 PM

My friend mentioned to me your blog, so I thought I’d read it for myself. Very interesting insights, will be back for more!
?????

View rosstaylor's profile

rosstaylor

518 posts in 101 days

10-24-2020 09:47 AM

You have done a great job. I will definitely dig it and personally recommend to my friends. I am confident they will be benefited from this site.
????????

View rosstaylor's profile

rosstaylor

518 posts in 101 days

10-26-2020 12:23 PM

Yes, great US Military force. Also, in his post you have given a chance to listen about US Military. I really appreciate your work. Thanks for sharing it.
???

View heenacruzl's profile

heenacruzl

78 posts in 489 days

10-27-2020 07:12 AM

The problem may seem simple, but through your pen, it impresses me.
play game

You must be signed in to reply.

DISCLAIMER: All views and comments posted by members are not necessarily those of HomeRefurbers.com or of those working on the site.

Latest Projects | Latest Blog Entries | Latest Forum Topics

LumberJocks.com :: woodworking showcase