Michigan Residential Builders License Practice Test

At what height must the top guardrail be located from the walking/working surface?

1. 36 +/- 2 inches

2. 48 +/- 4 inches

3. 42 +/- 3 inches

4. 54 +/- 5 inches

The correct answer is: 42 +/- 3 inches

The correct answer indicates that the top guardrail must be positioned at a height of 42 inches, with an allowable variation of plus or minus 3 inches. This height is established by safety standards to ensure effective fall protection in residential and construction settings. The rationale behind this specific height is based on ergonomic considerations and safety regulations. A guardrail at this height effectively protects workers by creating a barrier that reduces the risk of falling from elevated surfaces while accommodating a range of body sizes. The variability allowed in the measurement provides some flexibility in construction while still maintaining safety standards. Understanding the standards for guardrail height is crucial for compliance with safety regulations, protecting workers, and minimizing liability for builders and contractors. It's important for anyone preparing for the Michigan Residential Builders License to familiarize themselves with these specific requirements to enhance workplace safety in residential construction environments.