What is the proper climbing angle for a portable ladder?

The proper climbing angle for a portable ladder is 70 degrees because this angle provides optimal stability and safety for both the ladder and the individual using it. At this angle, the ladder is less likely to tip over and ensures that the weight is distributed evenly along the ladder's base and rungs. This positioning helps prevent accidents and falls while climbing or descending.

Climbing at too steep an angle, such as 60 degrees, can create an unstable base as the ladder becomes more vertically oriented, increasing the risk of the ladder slipping out from underneath the climber. Conversely, climbing at an angle of 80 degrees, which is almost vertical, can also lead to instability and make it difficult for the climber to maintain balance. A 90-degree angle, which places the ladder entirely vertical, is not practical for climbing as it does not allow for safe ascent or descent, nor does it distribute the user's weight effectively. Thus, 70 degrees strikes the right balance for safe ladder usage.