supply of rate contract for manufacture and supply of pretensioned prestressed concrete (psc)wider level crossing sleepers for 60kg rails as per rdsos drawing no: t-8969rate contract for manufacture and supply of pretensioned prestressed concrete (psc)wider level crossing sleepers for 60kg rails as per rdsos drawing no: t-8969,rate contract for manufacture and supply of pretensioned prestressed concrete (psc)wider leve l crossing sleepers for 60kg rails as per rdsos drawing no: t-8969(alt-1) with latest alteration (up to the dat e of opening of tender) and conforming to indian railway standard(irs) specification t-39 (sixth revision mar. 2021) for pretensioned prestressed concrete(psc) sleepers for with up to date amendment(up to the date of o pening of tender) [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] [ rate of supply 1059 units per month , commencement time allowed -2 month ]