What is considered unsafe for using a step ladder in terms of height?

• A. 10 feet
• B. 15 feet
• C. 20 feet
• D. 25 feet

Answer: (C)

When considering the safe use of step ladders, the height at which they become unsafe is significant. Typically, step ladders are designed for tasks at lower heights, and most guidelines advise against using them for work above 6 to 10 feet. At around 20 feet, the risk of losing balance, the ladder tipping, or slipping increases significantly, making it unsafe to use a step ladder at this height.

Using a step ladder at 20 feet not only exceeds the manufacturer’s recommendations but also increases the likelihood of falls, which can lead to serious injuries. Therefore, using a step ladder at this height is deemed unsafe, as it fails to provide the necessary stability and support required for safer working conditions. It's crucial to use taller, more stable ladders such as extension ladders when working at heights above 10 feet to ensure proper safety measures are in place.