Tender For supply of aluminium extension ladder 13 mtrs fully extended (8 mtr + 8 mtr) 2. made of special rectangular tubing having dual internal vertical supports for extra of size 77 x32 x2 mm and c shape size 15x12x3 mm as per is-733-1983 temper t-6. (3) steps will be made of 26 mm square corrugated tubing fitted on (4) distance of 250 mm (10 inch) centre to centre. width of extension ladder min-310 mm (approx.) (5) ladder will have fixed rubber pads and hook on top of the ladder hook made of ms flat 32x5 mm hook bending on 5 mm dia. (6) pulley bracket complete with rope of p.p. 10 mm and locking arrangement.