When working on a ladder, which rungs are forbidden for standing?

Standing on the top two rungs of a ladder is forbidden due to safety reasons. When a person stands on the top rungs, they have a higher center of gravity, which increases the risk of losing balance and falling. Additionally, using these rungs can restrict a person's ability to maintain a stable and secure posture, as they are unable to grip the ladder securely above. Safety standards generally specify that workers should avoid using the top rungs to ensure maximum stability and minimize the risk of accidents when performing tasks at height.

Other options do not align with established safety guidelines. For instance, while the bottom rung is sometimes used to get onto the ladder, it is not advisable to stand on it for extended periods as it does not provide adequate height or stability. Middle rungs are generally permissible for standing, provided they are not too high to maintain balance safely. Finally, the idea that every rung is usable contradicts ergonomic and safety principles that prioritize worker safety and injury prevention.