To ensure stability, what angle should non-self-supporting ladders be used at?

The ideal angle for non-self-supporting ladders is best represented by approximating a quarter of the working length. This means that for every four feet of height, the base of the ladder should be positioned one foot away from the wall or support it is leaning against. This 1:4 ratio provides a stable base, reducing the likelihood of the ladder slipping or tipping while in use.

Using this guideline ensures that the ladder remains secure and minimizes the risk of accidents, which is essential in maintaining safety standards during construction or maintenance tasks. The angle formed approximates the correct incline needed for stability without compromising the load-bearing capacity of the ladder.

In contrast, while angles like 30, 45, or 60 degrees may be common assumptions, they do not provide the same level of stability that the 1:4 rule ensures, especially when dealing with non-self-supporting ladders. Following this guideline ultimately promotes safer practices and aligns with industry standards for ladder use.