In ladder safety, the base offset is what fraction of the ladder length?

In ladder safety, the base offset is what fraction of the ladder length?

• A. 1/8
• B. 1/4
• C. 1/3
• D. 1/2

Answer: (B)

A stable ladder position comes from the base being set at about a quarter of the ladder length away from the wall. This follows the 4:1 rule: for every four feet you climb, move the base one foot away. If you call the ladder length L and the base offset b, the height reached is about four times b, and the ladder length is roughly sqrt((4b)^2 + b^2) ≈ 4.12b, so b ≈ L/4.12, which rounds to about L/4. In practice, that means the base offset is about one-quarter of the ladder length, giving a safe angle around 75 degrees. A smaller offset would make the ladder too steep and prone to tipping; a larger offset would reduce reach and stability.

A stable ladder position comes from the base being set at about a quarter of the ladder length away from the wall. This follows the 4:1 rule: for every four feet you climb, move the base one foot away. If you call the ladder length L and the base offset b, the height reached is about four times b, and the ladder length is roughly sqrt((4b)^2 + b^2) ≈ 4.12b, so b ≈ L/4.12, which rounds to about L/4. In practice, that means the base offset is about one-quarter of the ladder length, giving a safe angle around 75 degrees. A smaller offset would make the ladder too steep and prone to tipping; a larger offset would reduce reach and stability.