Balloon Framing with Metal Studs

[Ben29]

Balloon framing with metal studs: is it ever done? I am designing an interior "mezzanine" type structure inside an existing warehouse. The metal stud walls at the perimeter of the structure will go full height to the underside of the roof deck. I would prefer to do platform construction here, but trying to put on my "value engineering" cap to see if balloon framing would result in a substantial cost savings.

 

[phamENG]

Sure. Depending on what you're doing exactly, you can run the joists (assuming stud sections) into the wall and use self drilling screws to fasten the webs together. Add a 12ga or heavier angle to the outside face of the wall if you feel you need it. This would generally be a light duty application - maintenance access walkway, storing a few boxes, etc. Real storage and I'd go to something a bit more robust.

 

[Ben29]

The official name we are giving it is "maintenance access platform". I am told that people will be walking up there as needed to access the roof. Nothing will be stored up there. I am using a Live Load of 60 psf and my maximum span for this condition is 12.5ft.

 

[KootK]

The version of balloon framing that I encounter most often in CFM is where a track is screwed into the sides of the studs and the joists tie into that. It probably more fragile but, then, it requires less coordination between the studs and the joists. It also facilitates different spacings of the two. My preferred version of this has a clip thrown into the mix. That said, folks often seem to manage without that.

 

[XR250]

I've seen it done both ways but prefer Koots as it give more flexibility in stud/joist spacing.

 

[JedClampett]

Nothing will be stored up there.

Once you seal the drawings, you'll have no control of what they do with it. Designing it for 60 psf is a good step. Posting a sign "Not For Storage?" is another good thing. But don't be surprised if the next time you visit, there's a couple of pallets of copier paper up there. Tip: Don't overreact.
Also, be sure to brace the walls. I use diagonal metal strips; I think 2 inches by 14 gage attached to the studs and at the "panel points."