Applies to the design, fabrication, erection, repair and alteration of steel-work associated with machinery, cranes, boilers, pressure vessels, bulk handling equipment, and cold-formed steel structures in accordance with the working stress design method, but does not apply to road and rail bridges, material less than 3 mm thick, steel for which the design yield stress exceeds 450 MPa, and cold-formed members other than those complying with AS 1163.