bids are invited for replacement of old fibre sheets with gi sheets 15 by 15 ft including installation charges and modification of framing support to existing frame , maintenance of acoustic roof mounted protection with illumination for complete structure , maintenance upgradation and fabrication of existing staircase including repair of handrail for staircase and painting , repair and maintenance of existing working table with 18mm plywood platform with laminate top fitted and fixing of drawers with lock and keys , repair and maintenance of atc building supporting iron beam including scrubbing of complete structure applying primer coat oil painting and anti corrosion protection , repair cleaning and refurbishment of atc tower glass including replacement of glass and applying putty on the edges of glass , installation of suspended iron frame three side around air traffic control communication tower , repair and replacement of damaged door and windows of atc , cleaning and removal of surface and placing of paver block on the base of size 15 by 3ft all around atc including water proofing and strengthening of surface , aluminium composite panel of 1 point 5 mm thickness installed in ms pipe frame around atc , installation of aircraft red coloured warning lights 5ft above the atc tower with strong iron angle support including wiring , preparation of outdoor and indoor museum equipment and war trophies total quantity : 215