supply of aluminium extension ladder 15mtr , aluminium extension ladder 15mtr (45 feet on extended condition) fully extended (9.00mtr+9.00mtr) (27 feet o n closed condition) made of high tensile aluminium alloy with special rectangular tubing having dual internal vertical supports f or extra of size 77 x32 x2 mm and c shape size 15x12x3 mm confirming to he-30 grade t-6 temper as per is:733-1983 of hinda lco make steel, steps to be made of no slip aluminium alloy, square corrugated fluted pipe of 28x3mm dia. & distance of 250 m m (10 inch) centre to centre. width of extension ladder min-310 mm (approx.) steps to be riveted at 305mm interval, with alum inium lm-6 catcher to lock ladder at every rung, pulley bracket complete with nylon rope of p.p. 10 mm, rubber shoes at the bot tom safety, additional hook on top of the ladder , hook to be made of ms flat 32x5 mm, hook bending on 5 mm dia, ms guide pi pe mixed inside the ladder at 1 meter interval for stability of ladder. ladder fabricated by expanding and flaring runs with stiles of the ladder for 100% twist proof and unbreakable performance. as per the attached technical specification. make: skyward or sumer or sj ladders or equivalent. [ warranty period: 60 months after the date of delivery ] ]