Describes basic requirements for the specification and testing of platform containers designated 1A, 1B, 1C and 1D which, with certain limitations are for international exchange and for conveyance by road, rail and sea, including interchange between these forms of transport. The equipment covered is defined as a loadable platform having no superstructure whatever but having the same length and width as the base of series 1 containers, and equipped with top and bottom corner fittings, located in plan view as on other series 1 containers, so that some of the same securing and lifting devices can be used. Covers references, dimensions and rating, design requirements, and testing.