manufacturing and supply of wider pre stressed concrete sleeper pre tensioned type for level crossing for 60kg uic 60e1 52kg run ning rail and 52 kg check rail for 25 t axle load alt up to date as per rdso drg no t 8969 specification irs t 39 warranty period 60 month s after the date of delivery manufacturing and supply of wider pre stressed concrete sleeper pre tensioned type for level crossing for 60kg uic 60e1 52kg run ning rail and 52 kg check rail for 25 t axle load alt up