What must be assessed before entering a confined space?

Before entering a confined space, it is essential to assess atmospheric hazards, including oxygen levels and toxic gases. This is crucial because the safety of workers in confined spaces heavily relies on the air quality within those areas. Inadequate oxygen levels can lead to asphyxiation, while the presence of toxic gases can pose serious health risks, including exposure to harmful or flammable substances.

By measuring and evaluating atmospheric conditions prior to entry, workers can identify hazards that could result in life-threatening situations. This assessment is typically conducted through monitoring devices that can accurately detect oxygen concentration and the presence of hazardous gases. Understanding these aspects ensures that proper safety measures, such as ventilation or the use of personal protective equipment, can be implemented to protect workers.

While accessibility of tools, the physical appearance of the space, and the duration of work are important logistics to consider, they do not directly address the immediate dangers associated with breathing air in a confined environment. Therefore, assessing atmospheric hazards is the most critical step to ensure safety before entering such spaces.