supply of spares supply telescopic tower ladder for switchyard of 2x500 mw, btps, anpara , tiltable type telescopic tower ladder with tripple extension ( a ) height when closed--20ft. ( b ) height when extended-50ft. ladder made up of hindalco aluminium sections of size 66mm.x31m.m.x3m.m. approx. with steps of 25m.m. dia. pipes at distance of 300m.m. fabricated on suitable trolley of m.s.channel frames covered with 16 swg ms sheet with tow bar. also provided with solid rubber casted 02 fixed and 02 swivel wheel, suitable platform of size 2x2at top guarded from three sides, parking jack, winch set, ms pulleys and steel wire rope for handling the ladder.