I am currently working on a renovation project where I am converting a old Horse trailer (box) into a mobile bar. As part of this project I have had to replace the old flooring in the box. Previously this had been screwed down using self tapping screws directly into the steel frame and i could feel also that in the past someone had opted for nut and bolt.
I'm looking to get your opinions on how you think I should approach this. I am using a 18mm marine ply and it will have to sit on the 8mm steel frame. My question to the community is how do you think I should secure it down? What fitting to use and is it better to go top-down or down-top?
Just as a note, a lot of the old screws rusted, fused and then snapped off when removing.