supply of psc t / o sleeper 60 kg 1 in 16, rdso drg. no. t-5691psc t / o sleeper 60 kg 1 in 16, rdso drg. no. t-5691, manufacture and supply of prestressed mono block concrete sleepers ( pre-tensioned type ) for bro ad gauge ( 1673 mm ) for 1 in 16 psc turnout sets to suit 60 kg uic rail as per rdso drg no. t-5691 and irs specification no. t-45 ( 4th rev. march-2021 ) as amended from time to time up to date of opening of tender for pr e-stressed concrete sleepers ( pre-tensioned type ) . ( the alt. in drawing issued by rdso upto one month prior to tender closing date shall be applicable in this tender. ) [ warranty period: 60 months after the date of delivery ]