I don't really have a good reason, it just seemed like the difference between square tubing and the metal studs was minimal, in balance of the studs.
I want to pick the right material for the job however, I just don't know what is best yet. Here are the reasons was thinking studs over square tubing:
I can use the studs in the "skinny" orientation to save space
They are galvanized
Lighter per linear inch
I can still weld them if I have to
C shape eases making wiring or plumbing runs
Thinner means easier to drill or self tap screws
Wide flat area (when using in skinny oriented) gives more surface for attaching frp panels
Easier to change my mind later once the vehicle is more finished - don't want to have to set things on fire or metal shavings everywhere
Anyway I'm not dead set either way just thinking out loud.
Originally Posted by admiller
By steel joists are you talking about metal 2x4 studs? If so, why not build out of 3/4"-1" square tube. It's a bit more expensive, but a lot more structurally secure. And not to mention how much more space you would have.
And since you weld, it should be pretty easy.