Details: making connection of drain or sewer line with existing manhole including breaking into and making good the walls, floors with cement concrete 1:2:4 mix (1 cement : 2 coarse sand : 4 graded stone aggregate 20 mm nominal size) cement plastered on both sides with cement mortar 1:3 ( 1 cement : 3 coarse sand) finished with a floating coat of neat cement and making necessary channels for the drain etc. complete 1. for pipes 350 to 450 mm diameter demolishing cement concrete manually/by mechanical means including disposal of material within 50 meters lead as per direction of engineer-incharge: 1. 1:3:6 or richer mix (i/c equivalent design mix) demolishing r.c.c. work manually/by mechanical means including stacking of steel bars and disposal of unserviceable material within 50 meters lead as per direction of engineer-in-charge. earth work in bulk excavation by manual means over areas (exceedi
Sector: Urban Authority