What is the maximum angle for a ground ladder to be placed against a building?

The recommended maximum angle for a ground ladder to be placed against a building is 75 degrees. This angle provides a safe and stable positioning of the ladder, ensuring that its base is far enough away from the wall to allow for proper weight distribution and easy access to the top of the ladder.

Angles greater than 75 degrees can significantly reduce the effectiveness of the ladder, making it unsafe. At steeper angles, the ladder may become unstable and difficult to climb, increasing the risk of accidents. Conversely, angles that are too shallow can lead to a higher likelihood of the ladder slipping out from the base or not providing adequate reach to the desired height. Thus, a 75-degree angle strikes the right balance between stability and accessibility.