I am building a room within my garage using double studs, double track, steel framing. The outer dimensions for this room are 23' l x 16' 6" w x 10' h, and will share no common walls or ceiling with the garage space. The garage floor is 6" thick concrete.
Most steel construction calls for attaching the tracks to existing floor / ceiling joists, and then place the studs in between the two tracks. This will not work for my application, as I have no ceiling joists to attach to (so the top track will be flimsy).
To solve this problem, I would like to use a wood top plate on top of a steel track, and build a flat roof on top of the wooden top plate. (Similar to Detail No. W1 (p60) from the HUD: Hybrid Wood and Steel Details-Builder's Guide document.) The "Data" on page 61 of the guide lead me to believe this approach is possible.
My concern is that I have not found any examples of this kind of construction from searching the internet.
Does adding a wood top plate on top of the steel top track provide enough weight to stabilize the wall?
Are there any resources showing a build detail of this kind of construction?