WAC 296-806-42002. Follow these requirements for conveyors

(1) You must construct, operate, and maintain all conveyors according to this chapter and the American National Standards Institute (ANSI) B20.1-1957. (2) You must make sure all new conveyors constructed after January 1, 2005, meet the requirements of the American Society of Mechanical Engineers (ASME) B20.1-1996.