Not likely gonna work.

 

Keep in mind, deflection is what causes a problem. You wind up using more pounds of steel to get the same deflection as fewer pounds of wood.

Figure out how thick a 2X4 U channel would have to be to meet deflection, and think of the 2X4 lumber as a nailing surface.

It won't really be a hybrid, it will be light steel.

The metal studs are pretty light gage steel, even the ones considered heavy gage.

 

Floor trusses have been around since before you were born.

Sawn lumber for top and bottom chords and tubular steel for webs or sawn lumber for webs.

 

Short answer is no, it won't work, at all, ever.

 

I give you points for trying though.

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Works fine for a 24” span.


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i like the enthusiasm for innovation. Plenty of old dogs on here.

structural steel floors I work with a lot, I don’t think it’s ridiculous to think that shrinking the steel joists size to increase wood reinforcement makes sense. Maybe not all the way down to the 2x4 scale though, I would start by looking into just plain steel joists, if you need to use something other than wood, it’s probably easier to just use all steel joists, rather than taking the time to fit the two together rather than just sticking to one specifically

 

I work with a lot, I don’t think it’s ridiculous to think that shrinking the steel joists size to increase wood reinforcement makes sense.

Don’t mislead the kid to think that gauge don’t matter. He’s a student

Mike

 

whatever you do has to be approbed and stamped by an engineer. What you are doing in esense is reinforced wood.

 

To be brutally honest you can make anything work with a little imagination, but I don't think what you're proposing makes sense or is practical. I don't think a professional framer, structural engineer, etc., would ever consider this an option. There's more to think about than just something that works for floor framing. How are you connecting that to a wall? Beam? CMU or concrete if you're attaching it to a foundation/basement wall? Either stick with all wood, or all cold formed steel.

 

Dumb idea. No offense.