Doggggboy
Ultra Member
I used these to frame the inside of my steel frame shop with 2x4 prior to insulating.What I'd do.
I always use decking screws. They are made for trailer decking and are not wimpy like self tapping screws. They are hardened 1/4" x 24 thread self tapping and about 2.5" long. You drill 7/32" holes through the wood and steel and then use a drill or impact to drive them through. Lasts for many years. Every 53ft highboy rolling down the highway uses the same screws.
When the wood rots off, because they are hardened, you take a hammer and smoke them sideways and they break off, lay your planks and drive the new screws in.
Didn't even need to pre drill. Awesome screws.