It means that at least three points of your body, it might be either two hand and one foot or one hand and two feet, must be in touch with the ladder while ascending or descending. So keep your both hands free, never carry anything with your hands, while climbing.
Please note that the important part is while ascending and descending. Once you arrive to the level you want to work at, you may do light work that may require both hands. Do not lean out far enough to cause your belt buckle to extend outside the side rails. THERE IS NO FALL PROTECTION REQUIRED ON LADDERS. Always follow manufacturer's recommendations.
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Using Pythagoras' theorem the length of the ladder is 20.248 feet
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Using Pythagoras' theorem it is 20 feet
The three point stance is a common stance in the NFL. However, the wide receivers stopped using this stance in 1984.
Combine the equations together and using the quadratic equation formula it works out that the point of contact is at (5/8, 5/2)