Bharat Sanchar Nigam Limited-BSNL has published Tender For Providing Tower Earthing, Aviation Lamp, Lighting Spike And Painting Works To The60m Gbt Tower Atnazarthpet Site Poonmalle Chennai 600099. Submission Date for this Tender is 20-11-2023. Electrification Work Tenders in chennai Tamil Nadu. Bidders can get complete Tender details and download the document.
| Sl. No. | Item Description |
| 1 | Providing and placing in position prefabricated structure made up of 4 nos of G.I plates of size 600x600x6mm interconnected by G.I flat of size 50x3mm with necessary bolts and nuts and joints being made moisture proof with lead sheet between G.I plates and flats and providing and placing in position watering pipe of a 20mm dia G.I pipe of length 3.00m with funnel at top .The pit shall be excavated fora size of 2.0mx2.0mx 3.0m .The bottom 1.50 m shall be filled with sieved charcoal 20mmas per specification for earthing and remaining depth shall be refilled with excavated soil free from lumps as per specifications for earthing and as directed by the Engineer in charge.The galvanising shall be as per IS: 4759 with average mass of zinc coating of 610gm/sqm i.e approximately 85 micron |
| 2 | Providing and laying ring earth by excavating a trench of 300mm width and 1500mm depth and then laying a G.I strip of 50x3mm in the bottom of the trench and connecting it to all the tower legs with G.I strip of 50x3mm with GI bolts and nuts and also making provision for connecting ring earth to the lightening arrestor by providing 50x3mm G.I strip one end of which is connected to the ring earth by means of G.I bolts and nuts and other end left free above the earth with necessary bolts andholes including refiiling with fine soil completeas directed by the Engineer in charge |
| 3 | Providing and fixing spike type lighting arrestor made of 16mm dia copper solid rod of 1.50m long with necessary fixtures at the top of tower.The spike shall be insulated by Teflon material and connected with proper plugging arrangement as directed by the Engineer in charge |
| 4 | Providing and fixing strip size of 50x6mm without open joint (continuously welded) with necessary G.I clamps at every 1.00m interval (Porceline insulator bolts and nuts etc along with vertical runway including connecting with lighting spike at top of tower and earth at ground without overlap joint etc complete as directed by the Engineer in charge .The rate includes all required labours materials and insurance coverage |
| 5 | Providing and fixing testing joint made of 50x6mm G.I strip 250mm long with 6 Nos G.I bolts and nuts and washers etc complete as directed by the Engineer in charge |
| 6 | Providing and fixing RCC collar round or square type size upto 600mm600mmx50mm thick or 600mm dia , 600mm height with 50mm thick RCCcover and handle for earth chamber including 100mm thick RCC base slab, earthwork and refilling etc., complete and as directed by the Engineer in charge |
| 7 | Supplying and fixing LED aviation obstruction lamp of ISPL/INSTA POWER or equivalent approved make as per ICAO normswith light depedent reistance sensor day night automatic timer ) with necessary switches including all fixtures all as directed by the Engineer in charge |
| 8 | Double dome medium density flashing -red obstacle lighting system Type B at 60 metres height |
| 9 | Double dome lowdensity flashing -red obstacle lighting system Type B at 30metres height |
| 10 | Paintingwith Luxol or equivalent high glass synthetic enamel paint (from 23000.00 Kgto 25000.00 Kg ) in two or more coats over and including a base coat of approved primer zincphosphate or zinc chromate or equivalent over etchprimer to the required colour and even shade |
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