What is the recommended angle for placing a portable non-self supporting ladder safely?

Placing a portable non-self-supporting ladder at the correct angle is crucial for ensuring safety during use. The recommended angle for setting up such a ladder is based on the 4 to 1 rule, which means for every four vertical units of height, the base of the ladder should be one unit away from the surface it rests against. This angle provides optimal stability and minimizes the risk of the ladder slipping or falling over.

Choosing the correct angle is essential because if the ladder is too steep or too shallow, it can lead to dangerous situations such as loss of balance or undue stress on the ladder’s structure. The 4 to 1 rule has been established through safety standards and practical experience, making it a widely accepted guideline for ladder use in a variety of contexts, including construction and maintenance work.

Understanding and applying this rule is fundamental for anyone working with ladders to promote a safe working environment.