supply of rate contract for manufacture and supply of 1 in 12 bg 60 kg weldable cms crossing to rdsos standard drawing no.t-6412, manufacture and supply of 1 in 12 bg 60 kg weldable cms crossing ( wcms crossing ) on psc sleepers in accordance with rdsos standard drawing no.t-6412 with latest alterations including supply of a set of 6mm thick nylon chord reinforced grooved sole plates as per irs specn. t-55 with latest alterations required beneath wcms crossing as mentioned in rdsos standard drawing excluding standard fish plates, fish bolts an d nuts, e.r. clips, insulating liner etc. rails required for manufacturing of wcms crossing will be arranged by th e supplier at their own cost ( grade of rails should be as per latest guideline of the railway board or rdso ) , as per irs specn. irs:t-29-2023 with latest alterations. the term latest alterations wherever used will be mean th e alteration up to the actual date of opening of tender. [ warranty period: 30 months after the date of delivery ]