Applies to the design, fabrication, erection, repair and alteration of steelwork associated with boilers, pressure vessels, lifts, cranes, mining equipment, gas and liquid petroleum piping systems, bulk handling equipment, and the like 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 exceed 450 MPa, and cold-formed members other than those complying with AS 1163.