In construction, what is a common method to prevent falls from roofs?

Installing guardrails is an effective method for preventing falls from roofs because they create a physical barrier that helps protect workers from the edge. Guardrails are designed to be sturdy and secure, typically installed at specific heights and dimensions to comply with safety regulations. They not only provide immediate protection to workers who may be near the roof's edge but also serve as a visual cue, alerting workers to the potential fall hazard.

While using ladders is important for accessing different levels, they don’t mitigate the risk of falling from a height once a person is on the roof. Safety training is crucial for raising awareness about fall hazards and safe practices, but it does not provide a physical safeguard against falls. Wearing helmets is essential for protecting against head injuries if a fall occurs, but it does not prevent the fall itself. Therefore, guardrails are the preferred method among these options to directly prevent falls from roofs in construction settings.