Which of the following correctly states the round access diameter requirement for manholes?

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Multiple Choice

Which of the following correctly states the round access diameter requirement for manholes?

Explanation:
Understanding the minimum size of a round manhole opening is about ensuring safe entry and work inside. The required minimum diameter is 20 inches, which provides enough shoulder and body clearance for a worker to move in and out and to handle tools or equipment without getting stuck. Opening smaller than 20 inches would make entry awkward or unsafe, while openings larger than 20 inches meet or exceed the minimum but aren’t required by the standard. So 20 inches is the correct minimum round access diameter.

Understanding the minimum size of a round manhole opening is about ensuring safe entry and work inside. The required minimum diameter is 20 inches, which provides enough shoulder and body clearance for a worker to move in and out and to handle tools or equipment without getting stuck. Opening smaller than 20 inches would make entry awkward or unsafe, while openings larger than 20 inches meet or exceed the minimum but aren’t required by the standard. So 20 inches is the correct minimum round access diameter.

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