Manufacturing Skill Standards Council (MSSC) Safety Assessment Practice Test

When using an extension ladder, the distance the foot of the ladder is set from the house should be about_________ the height of the extension.

1. 1/4

2. 1/2

3. 1/3

4. 2/3

The correct answer is: 1/4

When positioning an extension ladder, safety standards suggest that the foot of the ladder should be set at a distance that is about 1/4 of the ladder's height from the wall or the house to ensure stability. This ratio helps to minimize the risk of the ladder slipping or tipping over when weight is applied. The reasoning behind this guideline is rooted in physics and the need for a stable base; a greater distance would compromise the ladder's balance, while a lesser distance could increase the likelihood of the ladder toppling backwards. Therefore, using the 1/4 ratio provides a balance between reach and safety, allowing for a safer ascent and descent when using the ladder. Understanding this distance helps prevent accidents and ensures that users can operate the ladder safely while performing tasks at heights.