On its customer Web site, the Union Pacific Railroad characterizes a gondola as an "extremely sturdy open design" for carrying "rugged unfinished commodities"; its "large flat interior design with side walls" is described as "more flexible than a flat car." These qualities make the modern gondola particularly popular with the steel industry, for transportation of loose materials like scrap metal, waste, coke, and slag as well as finished products like iron or steel plate, pipe, structural steel, and rails for railroad track. Our car replicates a 52' mill gondola, so-called for its popularity with steel mills, and carries a removable load of scrap metal that might be recycled and used to stamp parts for autos, appliances, and a variety of other products.