DO position the ladder so that the base won't slip outwards

Leaning ladders are designed so that their safest angle of use comes when every 1 measure out from the wall is matched by 4 measures up it (rungs are usually about a third of a metre apart, so its easy easy enough to get the distances roughly right). Most new extension ladders now have a mark on the stiles to show the safest angle of leaning. Remember the rule: 'ONE OUT FOR FOUR UP' The more the base is moved out from this position, the greater the risk that it will slip outwards suddenly and fall down without warning!

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