4-to-1 Rule for Extension Ladders
Use the “4-to-1 Rule” for extension ladders, which states that
for each 4 feet of distance between the ground and the
upper point of contact (such as the roof), move the base of
the ladder out 1 foot. Always face the ladder when climbing,
and wear slip-resistant, rubber-soled shoes. Keep your body
centered on the ladder. You can gauge your relative position
using your belt buckle, for example. If your buckle passes
beyond the ladder rail, you are over-reaching and at risk of
falling. Stand at or below the highest safe standing level on a
ladder. For a step ladder, the safe standing level is the
second rung from the top, and for an extension ladder, it's
the fourth rung from the top.
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