tender for aluminium self support extension ladder - 12 feet closed; 20 feet extended height with safetyhandrails at top with platform and tool tray. steps made of 26x3 mm round corrugated flutted pipe, main extrusionmade up of aluminium alloy c section 66x32x3.18mm thickness of he 30 grade t6 temper hindalco makesimilar to rks model no:507. aluminium cross welding support for strengthening the ladder. spare 4 nos rubbershoes to be provided; 2 nos. small wheels to be provided at sides for dragging the ladder.
