What is the '1-in-4 rule' that applies to the positioning of a leaning (single) ladder?
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A
For every 4 rungs climbed, the worker must pause and reassess
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B
No more than 1 in 4 workers on site may use ladders at the same time
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C
For every 4 units of vertical height, the base of the ladder must be 1 unit out from the wall
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D
Ladders must be inspected every 4 uses or once per day, whichever is sooner