To carry on the business of contractors, sub-contractors, quasi contractors and to undertake contracts and subcontracts relating to construction, modification, repairing, alteration, construction, removal, redecoration, redesigning, enlarging, improving and designing of civil work, building for whatever use, roads, approach roads, streets, circles, squares, parks, gardens, statues, parking places, bridges, dams, watercourses and reservoirs, tunnels, earthworks, sewers, tanks, drains, sewage, lighthouses, towers, transmission towers, pipelines, underground cables, railway tracks, railway sidings, runways shipyards, stockyards, culverts, channels whether on a turnkey basis or on labour contracts or otherw