Which statement best describes the 4:1 rule for ladders?

• A. For every 4 feet of height, the base should be 2 feet out.
• B. For every 4 feet of height, the base should be 3 feet out.
• C. For every 4 feet of height, the base should be 4 feet out.
• D. For every 4 feet of height, the base should be 1 foot out.

Answer: (D)

This item tests ladder placement angle using the 4:1 rule. It guides you to set the base one foot out from the wall for every four feet of ladder height, which helps maintain a stable, safe angle.

In practice, base distance = height ÷ 4. So at 8 feet high the bottom should be about 2 feet out; at 12 feet high about 3 feet out. This yields roughly a 75-degree angle, which is considered a safe balance between stability and work clearance.

The other options would move the ladder away from that safe range: two feet out for four feet of height makes the angle around 63 degrees, which is too steep and more prone to tipping; three feet out gives about 53 degrees, even more unstable; four feet out gives about 45 degrees, which is clearly unsafe. Using the 4:1 rule helps ensure a stable setup during ascent and work.