bids are invited for sitc of lightening arrestor for dvor at kullu manali airport conventional lightning arrestor , multi stranded 75 sq mm copper wire , frangible fibre reinforced plastic poles , concrete base for erecting frp poles - cast in situ rcc 600x600x600 mm , brazing points , installation work , copper plate - 600mm x600mmx 3.15mm thickness copper purity not less less than 90 percent , brazing of interconnection - brazing of all interconnection and joints of copperstrips copper cables of cns earthing systems and lightening arrestors , pvc pipe for earth pits - 40mm diameter length of 3metercontains holes of 12mm diameter in zigzag manner starting from 15cm away from bottom to 2m heightas per attached technical specification , salt - about 1 to 3cm granules , charcol - about 1 to 3cm granules , inspection chamber , installation work of earthing pit total quantity : 1147