This Standard sets out requirements for a design method and the installation procedure for long-span corrugated steel structures with longitudinal stiffeners, including horizontal ellipses, inverted pear shapes, high profile arches, low profile arches, pear arches, and special shapes, having dimensions within the limits specified in Clause 2.2.This Standard does not cover the design of longitudinal stiffeners, footings, and end stiffening collars.NOTE: Requirements for the materials and manufacture of these structures are specified in AS 3703.1.