Specifies requirements, additional to those in AS 1418.1, covering top-running and underslung bridge cranes and gantry, semi-gantry, cantilever gantry and portal cranes as defined in AS 2549. Classification, load rating, design stability, mechanisms, performance, marking, access, clearances and inspection are specified. Appendices provide guidance on information to be supplied with enquiries, order or tender, and on statutory approval.