tender for uxjifjkn dk;kzy; esa qsjksaa doj liykbz djus dk dk;za , providing and fixing of reinforced ferro-cement drain covers designed for aa class loading duly marked on cover with adequate steel reinforcement having thickness 75mm to 150mm anti corrosive bitumen painted m.s. plate , rim and m.s. lifting hooks, admixtures like plasticizer, bond improving compound, shrinkage, resistance compound, abrasion resistant complete as per approved design etc. standard size 600x800mm (75mm thick) for span 300 to 450mm , standard size 1000x800mm (100mm thick) for span 451 to 700mm , standard size 1500x600mm (125mm thick) for span 701 to 1200mm , standard size 2100x500mm (150mm thick) for span 1201 to 1500mm