What is the primary purpose of a guardrail system?

The primary purpose of a guardrail system is to prevent falls. Guardrails are crucial safety features used in construction and maintenance settings to protect workers from the risks associated with working at heights. By serving as a physical barrier, guardrails help to minimize the likelihood of a worker accidentally slipping or losing balance, thereby reducing the risk of serious injuries or fatalities that can result from falls.

In reference to the other options, while providing support for equipment, offering barriers for hazardous materials, or marking boundaries can be important in certain contexts within the workplace, they do not capture the core function of guardrails. Safety protocols prioritize fall prevention, making guardrails an essential component in maintaining a safe working environment on elevated structures.