What is the minimum height of guardrails made from 2 x 4 lumber?

The minimum height of guardrails made from 2 x 4 lumber is 42 inches. This standard is established to ensure safety on elevated surfaces, such as construction sites, scaffolding, and other areas where there is a risk of falling. Guardrails are designed to prevent accidents by providing a physical barrier.

The height of 42 inches is based on regulations that prioritize worker safety, providing sufficient protection for people working at heights. This height is generally accepted as suitable for most contexts where guardrails are needed, ensuring that they can effectively prevent falls.

While other heights might seem reasonable, they do not meet the established safety criteria for protecting workers effectively in these scenarios. Using heights lower than 42 inches may lead to inadequate protection, which is why adherence to this regulation is critical in maintaining a safe working environment.