So I was doing some reading and found that people were talking about using deck screws for their framing, but here's where I'm at.
I did my floating floor similar to that of Jake C's "Project Brutus" Bus, and I have 2" of styrofoam insulation with 2" cubes as studs down the middle of the bus to attach each 1/2" plywood panel of subfloor on top of.
Here's a picture of Jake C's bus for an example.
What I'm wondering is what type of screw I should use and length to attach into the studs. Obviously between the 2" wood stud and the 1/2" plywood, I'm looking at 2.5" of depth maximum before the steel flooring, so I was thinking I need 2" screws, but I want to make sure I use the right type since I'm out of my element.
Thanks in advance