To carry on the business of contractors, sub-contractors, quasi contractors whether for government or for semi government bodies or corporation or company or society or body corporate or firms or individuals or schools or clubs or other bodies or private works and to undertake contracts and sub contracts 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, water courses and reservoirs, tunnels, earth works, sewers, tanks, drains, sewage, light houses, towers, transmission towers, pipe lines, under ground cables, railway tracks, railway sidings, run ways ship yards, stock yards, culverts, channels whether on a turnkey basis or on labour contracts or otherwise.