What materials should I use for an Observation Deck
I have a 1988 Blue Bird school bus that I am transforming into a tailgating/nascar bus. I want to put a deck on top of the bus along with a porch on the back. What gauge square tubing should I use for the supports on the deck? also how do I need to attach to the rails on the back of the bus and with what material? Any help would be greatly appreciated maybe even pictures thank you.