bids are invited for dvor sites at igia copper strip isi mark size 25mm x 3 mm quality including connection with brass nut bolt spring washer etc for use outside the building , earth pit of the size of 1 meter diameter and 3 meter depth shall be excavated after depth of 3 meters the size of excavation shall be 900 x 300 x 900 mm depth , a 450x450x450mm inside dimension concrete box with smooth cement plaster finish shall be provided on the top of the pit. , 600 mm x 600 mm x 3.15mm pure copper plate purity not less than 99 percent. lab purity certificate should be attached. , copper bus bar purity not less than 99 percent 450 x 25 x 6mm minimum dimension with brass nut bolt spring washer etc. 8 holes at equal distance. , gi pipe with funnel for watering 40mm dia and 4meter length. holes of 12 mm dia within 15 cm from bottom upto 2 meter height. , charcoal , salt , conventional lightning arrestor , multi strand 75 sq mm copper wire , frangible fibre reinforced plastic poles , concrete base for erecting frp poles , brazing points , hdpe pipe , installation of lighting arrestor and earthing system including any other works required for sites at sampla sakras chillerki igi airport sitc of lighting arrestors and earthing system at various total quantity : 1231