This International Standard specifies the requirements for a range of scraper bars for use in twin outboard chain assemblies made from chains complying with ISO 610 and associated shackle type connectors complying with ISO 1082. The range of scraper bars specified is intended for use with chains of diameter 14, 18, 22, 24 and 26 mm in a selected range of chain centres and clamped tight within the shackle type connectors. This International Standard is not intended to indicate a complete design, but gives sufficient detail to ensure dimensional compatibility with the associated chains and connectors. Dimensions of section ends of the scraper bars necessary for compatibility between scraper bars and connectors are specified. The centre sections of the scraper bars may be of any design and shape, within the range of dimensions given in table 1 for the appropriate chain centres. Other dimensions may be subject to national Standards or agreement between the purchaser and the manufacturer. As a guide to the selection of scraper bars for specific applications, scraper bars are rated by determining the forte at which a specified minimum deflection is attained, when the bar is subjected to a three-Point bend test. The bars tan be classified as “lig ht”, “medium” or “heavy”, according to their strength ratings.