What is the recommended angle between the ladder and the floor?

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Study for the California C-33 License Exam with comprehensive questions and detailed explanations. Prepare for success with our targeted practice quizzes and enhance your understanding of painting and decorating contractor requirements.

Multiple Choice

What is the recommended angle between the ladder and the floor?

Explanation:
The safe, recommended angle for a leaning ladder is about 75 degrees from the floor. This comes from the common 4:1 rule: for every 4 feet of ladder height up the wall, place the base about 1 foot out from the wall. In a right triangle, tan θ = height/base, and with base = height/4, tan θ = 4, so θ = arctan(4) ≈ 75.96 degrees. That places the ladder in a stable position where it’s not too steep to slip at the base or too shallow to tip backward. So about 75.5 degrees is a close, practical value. The other angles are either too shallow or too vertical for safe use.

The safe, recommended angle for a leaning ladder is about 75 degrees from the floor. This comes from the common 4:1 rule: for every 4 feet of ladder height up the wall, place the base about 1 foot out from the wall. In a right triangle, tan θ = height/base, and with base = height/4, tan θ = 4, so θ = arctan(4) ≈ 75.96 degrees. That places the ladder in a stable position where it’s not too steep to slip at the base or too shallow to tip backward. So about 75.5 degrees is a close, practical value. The other angles are either too shallow or too vertical for safe use.

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