provision of operational stores:- ( a ) construction of lightning conductor earthing electrode. prefab gel earthing electrode of pipe in pipe technology. two b class is mild steel pipe, one inside the other hot dip galvanized with 100 micron coating inside, field high conductor and corrosion resistant crystalline mixture and back fill compound around electrode as per is 3042 / 1987. ( b ) lightning rod ( earthing electrode ) gi pipe 100 mm dia 1.90m long med grade isi marked back fill compound ci manhole cover of size 30cm x 30cm aluminum strip 32 x 6mm gi strip 32 x 6mm iron spikes 18 long gi socket reducer 20-40mm lightning terminal copper with 5 nos long prong 15cm long ms clamp 40x2mm with nut and bolts complete gi wire 12 gauge gi pipe 40mm dia med grade isi marked make: tata / jindal / sail c ) construction material:- cement opc 43 grade in hdpe bags of 50 kg each, make : acc / ambuja / jk cement sand coarse as per is 383-1970 20 mm stone graded aggregate as per is-385-1970