MIL-S-52713B, MILITARY SPECIFICATION: SPREADERS, LIFTING, 1S0 AND INTERMODAL FREIGHT CONTAINERS (22 MAY 1984) [NO S/S DOCUMENT]., This specification covers modified commercial, lifting spreadersfor handling of International Standards Organization (1S0) and American NationalStandards Institute (ANSI) Series 1, freight containers, weighing up to 67,200pounds and 35 foot containers used in intermodal (land, rail, air, and marine)service.