wichita.edu
…been struck by something, hit something, or been dropped Don't use and try to repair defective ladder! Ladder Setup 4-to-1 rule: Place the base of the ladder 1 foot from the wall for every 4 feet between the base and the support point. For instance, if it is 8 feet from the base of a ladder to its support point, the base of the ladder should be 2 feet away…
https://www.wichita.edu/services/environmental_health_and_safety/Prevent_slip_fall.php