The Ultimate in Strength and rigidity can be expected from our top of the range industrial alloy ladders. Class 1 ladders are recognised throughout the industry as the ultimate in quality and strength. Manufactured to the highest standard BS2037 class 1, BS 2037 CLASS 1 Industrial Max static load 175kg (27.5st) Duty rating 130kg (20.5st) Closed length 5.5m (18ft) Extended length 10.1m (33ft) Rungs per section 21 Weight 33kg 973lbs