Heavy Duty Manhole Covers are designed for continuous drains for water to seep in the gutters. These are thus also termed as Water Entrant Covers. These are only covers without frame.They are available in various load capacities ranging from 2.5 Ton to 40 Ton. *used on carraigeways and are usually sewer covers with high load capacity for heavy vehicular traffic. *Maintenance free manhole covers, Wide range of sizes, colors and shapes, *Will not corrode, crumble or crack, *Non-metallic manhole cover design eliminates possibility of theft.