Tim,
Eighteen years, WOW! Long lasting and trouble free is what I'm lookihg for. If PT holds up that well for that long, I don't know if the extra cost of steel would be worth it
I admit, I don't get out much, but I don't think I've ever seen a straight piece of PT lumber. Is it possible to find flat, straight PT flooring material 16' long? The boards on my trailer now are 2x8s.
OkieG