Final answer:
The question concerns engineering safety standards which require guardrails on elevated open-sided platforms, like mezzanines, that are more than 30 inches above the floor to prevent falls.
Step-by-step explanation:
The student is asking about the safety regulations concerning guardrails in an engineering or construction context. Guards, also known as guardrails, are an important aspect of occupational safety and are required where there is a risk of falling from a height. According to the Occupational Safety and Health Administration (OSHA) standards, guards should be located along open-sided walking surfaces, mezzanines, equipment platforms, stairs, ramps, and landings that are located more than 30 inches above the floor or grade below. This measure is designed to prevent falls and injuries by providing a physical barrier between people and the drop-off.
In engineering, guards are used to ensure safety on open-sided walking surfaces, mezzanines, equipment platforms, stairs, ramps, and landings that are located more than a certain height above the floor or grade below. The specific height requirement for guards can vary depending on local building codes and regulations. For example, in the United States, the International Building Code requires guards to be located on open-sided walking surfaces that are located more than 30 inches above the floor or grade below.