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Old 10-29-2012, 07:31 PM   #1
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Steel stud electrical box flex


It's been a few years since I've done electrical with steel stud's in residential. I'm about to do a job and I remember way back people adding a backing support of drywall or scrap 2x4's so the boxes don't flex.

If the wall is to be drywalled, I don't believe the box needs to be supported behind if the receptacles and switches are face mounted onto the drywall. Correct or no?

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Old 10-29-2012, 09:15 PM   #2
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Steel stud electrical box flex


As long as there are drywall screws into the metal stud near the box, it shouldn't flex noticeably.

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Old 10-29-2012, 09:17 PM   #3
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Steel stud electrical box flex


These are what is commonly used.

http://meproducts.net/products?subcategory=G26
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Old 10-30-2012, 12:00 PM   #4
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Steel stud electrical box flex


Quote:
Originally Posted by n0c7 View Post
It's been a few years since I've done electrical with steel stud's in residential. I'm about to do a job and I remember way back people adding a backing support of drywall or scrap 2x4's so the boxes don't flex.

If the wall is to be drywalled, I don't believe the box needs to be supported behind if the receptacles and switches are face mounted onto the drywall. Correct or no?
It is a good idea and a requirement that the box be mounted securely/properly.
And I have seen many installations where no extra support was provided and the boxes were solid. The conduit was assisting in supporting the boxes. Some inspectors will flag this.
I would use some of the metal framing laying around to make a bracket to mount the boxes to. Or buy some of the brackets shown above.
If the metal is gone, use a piece of 2x4. Drywall is not suggested for anything but its intended purpose.
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Old 10-30-2012, 10:45 PM   #5
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Steel stud electrical box flex


Quote:
Originally Posted by J. V. View Post
It is a good idea and a requirement that the box be mounted securely/properly.
And I have seen many installations where no extra support was provided and the boxes were solid. The conduit was assisting in supporting the boxes. Some inspectors will flag this.
I would use some of the metal framing laying around to make a bracket to mount the boxes to. Or buy some of the brackets shown above.
If the metal is gone, use a piece of 2x4. Drywall is not suggested for anything but its intended purpose.
What's the big deal especially if the plugs/switches are face mounted to the drywall? It's never going to flex. I can see if the hole is cut too large and you have to bend the ears and install the plug/switch directly to the box but if not it seems like a wasted effort.
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