The chequer plates for the replacement of wagon deck shall be hot-dip galvanized steel complying with BS EN ISO 1461.The thickness of the chequer plate shall not be less than 8 mm and the design bending strength shall be 275 N/mm2 for grade S275 steel complying with BS EN 10025.The Contractor shall submit the specification of chequer plate to the Engineer for approval.All chequer plates shall be coated with anti-rust primer and then finally painted with matt black colour. Technical requirements of paint system are specified inclause 3.12 of this Particular Specification.