Details: name of work: renovation of type_i (twin set) qtr no. hq ii a & ii b at silva complex haddo, silviculture divisionitem description2chipping of unsound/weak concrete material from slabs, beams,columns etc. with manual chisel and/ or by standard power driven percussion type or of approved make including tapering of all edges, making square shoulders of cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc. and disposal of debris for all lead and lifts all complete as per direction of engineer-in-charge 25 mm average thickness floor areaproviding cement concrete surface drain with 1:3:6 (1 cement: 3 coarse sand: 6 graded stone aggregate 40mm nominal size) finished with 1:4 (1 cement: 4 sand) including floating coat of neat cement inside the drain and its top and exposed surface including earthwork in excavation and disposed of surplus earth etc. complete 15cm x 15cm surface drain.repairs to plaster of thickness 12 mm to 20 mm in patches of area
Sector: Forest and Environment