tender for annual maintenance contract for painting steel structurals in ttpl - labour charges for cleaning the surface thoroughly by chiselling, scrapping, wire brushing, sand papering and providing protective covering over the equipments, vessels and tio2 bags etc to prevent rust and dust falling inside including charges for all tools, scaffolding etc. complete as per the direction of the engineer in charge. 3 labour charges for painting with zinc chromate primer over steel structurals such as columns, beams, roof trusses, purlin, louvers, brazing, connected platforms, hand rails, staircases, walkways, pipelines, cable trays, steel doors , windows, gates, cover plates, tanks, ducts, scrubber stack, chimneys and equipment supports etc after cleaning the surface complete as per the direction of the engineer in charge. 4 labour charges for painting with rubber based paint (lighty grey) over steel structurals such as columns, beams, roof trusses, purlin, louvers, brazing, connected platforms, hand rails, staircases, walkways, pipelines, cable trays, steel doors, windows, gates, cover plates, tanks, ducts, scrubber stack, chimneys and equipment supports including charges for all tools, scaffolding etc complete as per the direction of the engineer in charge. 5 labour charges for painting with rubber based paint (dark grey) over steel structurals such as columns, beams, roof trusses, purlin, louvers, brazing, connected platforms, hand rails, staircases, walkways, pipelines, cable trays, steel doors , windows, gates, cover plates, tanks, ducts, scrubber stack, chimneys and equipment supports including charges for all tools, scaffolding etc complete as per the direction of the engineer in charge.