The Doepker Classic Steel Super B is the open-end bulker that reset the standard for grain hauling when it launched in 1997, and it still carries a 46.5-tonne payload capacity. Its highly engineered steel construction is strong enough to earn a 5-year 100% structural warranty yet light enough that comparably equipped aluminum trailers are still working to shed roughly a ton. A proprietary 100% pure zinc coating covers the complete outside top to bottom, engineered specifically to fight Canadian road contaminants and protect resale value.