The Bunbury ship loader is an Eco-shiploader, a concept developed by ThyssenKrupp in Canada. The entire conveyor system is totally enclosed in a tubular gallery inside a boom, eliminating the inconvenience of a conventional spillage protection system. A tubular steel boom and shuttle structure provide both the structural system as well as the fully enclosed space where all spillage and dust is effectively sealed, protecting the environment. The 90 metre long shuttle structure and 63 metre boom were fabricated and constructed by Doina Engineering & Construction from 350 grade XLERPLATEÂ® high quality hot rolled steel from BlueScope Steel. The steel plate was rolled to form tubular steel sections, four metres in diameter. Steel Australia June 2005.