The life-span of a boxcar is 40 years. After that federal regulations state that they are no longer viable and must be destroyed. All reusable parts are removed to be rebuilt, the steel is scrapped, and I purchase the wood floors.
I travel around the country removing the flooring from these obsolete train cars and sell it to architects, builders, furniture makers, restaurants and bars, etc. Boxcar floor generally comes in oak or maple, 8 – 9 feet long, 12 inches wide, and 2 3/8 inches thick.
Each square foot weighs about 8 -9 pounds. The boards are glued-up butcher-block style. No screws, or nails are used in their construction. I get large quatities of this material but sell out often, so please call for availability and price.