bids are invited for vertical ladder twenty mtr height with slope of sixty to seventy degree , tower height of twenty mtr and width as per design approved by nabl ie national accreditation board for testing and calibration lab , platform in between at every five mtr ie iron platform with angle iron , air bag oblique mattress width ten inches length ten ft height twelve inches , slithering rope twenty mm two hundred fourty mtr , slithering gloves , helmet isi , pulley , lighting and electrical fittings from base to top platform with 2 core wire pvc , mcb box , carabineer hook , two hundred watt led lights with iron poles and necessary electrical fittings , seat harness , grease gun , lightning arrester , two coats of primer and two coats of paints total quantity : 562