Retrofitting boxes in steel stud construction

Discussion in 'Electrical Forum discussion & Blog' started by Homeownerinburb, May 7, 2013.

  1. Homeownerinburb

    Homeownerinburb New Member

    Messages:
    525
    Location:
    Los Angeles, CA USA
    Here's one that is new on me:

    Just walked thru a modest job that requires replacing two 4"sq boxes with three gang.

    Apparently the building is built of steel studs.

    I want to do the least damage possible.

    What do you think I will run into, and how can I do this cleanest?
  2. ActionDave

    ActionDave Electrician

    Messages:
    345
    Location:
    Colorado
    You can use gem boxes and gang them together and hold them with madison straps, but I wouldn't. I would cut away some drywall, use a Caddy screw gun bracket a metal box and mud ring. If you can't patch drywall do it anyway. You'll be good at it by the end of the job.
  3. Homeownerinburb

    Homeownerinburb New Member

    Messages:
    525
    Location:
    Los Angeles, CA USA
    I'm pretty good at patching drywall.

    My current inclination is to use a three gang masonry box. I will figure out how far from the opposite drywall it would fall to be flush with the face of the drywall, and glue a suitable pad of wood there, then run some screws thru the back of the box to secure it. A 3 1/2" box probably needs a 3/4" pad behind it. Construction adhesive is my friend!

    I'd not use this approach if the box was going to house a receptacle, but there will only be switches in them.

    This is no less secure than an old work box with wings. Which I don't like to use with receptacles.....
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