If a solid obstruction below the ladder is wider than 12 inches, what minimum clearance must be provided between the center line of a rung and the obstruction?

• A. 3 inches
• B. 7 inches
• C. 9 inches
• D. 5 inches

Answer: (B)

When placing a ladder near an obstruction, you must maintain enough side clearance so the rung doesn’t contact the obstruction as you climb or work. If the obstruction below the ladder is wider than 12 inches, the minimum distance from the center line of a rung to the obstruction is 7 inches. This amount provides a safe margin for ladder flex, movement, and your footing, preventing contact with the obstruction. Distances like 3 or 5 inches would be too small to ensure safety, and 9 inches exceeds the required minimum.