After 10 months of waiting for a permit, my shop is close to being done. I'll post pictures soon but I have a question.

In the new workshop I have a second floor (there is a lift) that is right now plywood. I'm thinking of some kind of flooring but I am not sure what will work. My plan for it is to store wood, lesser used tools, etc on the second floor using rolling carts. The carts may weight up to 400lbs.

I've seen rubber mats for garages but I don't know how well those will work trying to roll a cart across them.

Any suggestions?