What determines whether a space is considered a confined space?

A space is classified as a confined space primarily due to its limited openings for entry and exit, along with unfavorable ventilation conditions. These characteristics can pose significant risks to workers, as confined spaces can become hazardous if they contain harmful gases, lack sufficient oxygen, or have the potential for engulfment or entrapment.

The definition emphasizes the importance of the environment within the confined space; restricted access can make it more difficult for workers to escape in an emergency or for rescuers to gain quick entry. Additionally, poor ventilation means that any pollutants or harmful atmospheres can accumulate, further increasing the dangers associated with working in such spaces.

In contrast to this, wide entry points and easy accessibility suggest that workers can enter and exit freely, which reduces the risks typically associated with confined spaces. Continuous worker occupancy does not inherently define a space as confined either; rather, it is the conditions surrounding access and the atmosphere within that determine the classification.