Wooden Roller coasters primarily use a very specific type of wood called Southern Yellow Pine (SYP) for their structure and track. Southern Yellow Pine has become the industry-standard wood used worldwide for most modern wooden roller coasters due to its density, strength, and pressure-treatment capabilities. For more than two decades, S.I. Storey Lumber Company in Armuchee, GA has specialized in high quality treated Southern Yellow Pine that has been used in roller coasters around the world. S.I Storey lumber is in use at many Six Flags parks, smaller local parks across the United States and even international parks like Walibi Belgium. Please note that of the coasters pictured in this article only Viper and Weerwolf are known for certain to have S.I. Storey lumber.