Open Closed Signs
Open closed signs provide information and instructions about your building or business. White signs with black text can be used to show whether your business is open or closed, or inform the public and workers about closing doors.
When a non-life-threatening hazard is present with the opening and closing of doors, a Warning sign should be used. AS 1319 states that a Warning sign has a black triangle on a yellow background.
Learn more about Australian Standards here.