What is the proper angle to climb a ladder for optimal safety and efficiency?

The proper angle to climb a ladder for optimal safety and efficiency is 75 degrees. This angle allows for the best combination of stability and reach when using the ladder. When set at this angle, the base of the ladder is positioned one-quarter of the ladder's working length away from the wall or structure it is leaning against. This configuration reduces the risk of the ladder slipping or tipping over while providing enough height for efficient access to elevated areas.

Setting the ladder at a steeper angle, such as 90 degrees, compromises stability because the base of the ladder would be too close to the wall, increasing the potential for a fall. A more acute angle like 60 degrees may feel safer but can also lead to improper weight distribution, making it less effective for climbing. Additionally, placing the ladder at a flatter angle like 45 degrees reduces its overall reach and increases the likelihood of overreaching, which can result in loss of balance. Thus, the 75-degree angle is the industry standard recommended for ladder safety.