What is the maximum length of a non-self-supporting single ladder?

What is the maximum length of a non-self-supporting single ladder?

• A. 16 ft
• B. 24 ft
• C. 20 ft
• D. 30 ft

Answer: (C)

This question is about the maximum length allowed for a non-self-supporting ladder, which is a straight ladder that must be leaned against a surface and isn’t able to stand on its own. The safety reasoning is that the longer the ladder, the more unstable it becomes when it’s leaned, increasing the risk of slipping or tipping. To keep stability and the working angle manageable, OSHA limits this type of ladder to 20 feet. When using a ladder at its limit, place the base roughly a quarter of the ladder’s length away from the wall to maintain a safe angle (about 75 degrees). For a 20-foot ladder, that’s about 5 feet from the wall. If you need to reach higher than 20 feet, switch to a different ladder type, such as an extension ladder, and follow proper securing and fall-protection practices. If you’re using it to access a roof or platform, ensure the ladder extends at least three feet above the landing.

This question is about the maximum length allowed for a non-self-supporting ladder, which is a straight ladder that must be leaned against a surface and isn’t able to stand on its own. The safety reasoning is that the longer the ladder, the more unstable it becomes when it’s leaned, increasing the risk of slipping or tipping. To keep stability and the working angle manageable, OSHA limits this type of ladder to 20 feet.

When using a ladder at its limit, place the base roughly a quarter of the ladder’s length away from the wall to maintain a safe angle (about 75 degrees). For a 20-foot ladder, that’s about 5 feet from the wall. If you need to reach higher than 20 feet, switch to a different ladder type, such as an extension ladder, and follow proper securing and fall-protection practices. If you’re using it to access a roof or platform, ensure the ladder extends at least three feet above the landing.