What distinguishes an enclosed space from a confined space?

An enclosed space is characterized by having bulkheads and possibly overheads, which means it is a space that is surrounded by walls and a ceiling. This structure differentiates it from a confined space, which may not have defined walls or a ceiling and is typically accessible from only one side. Enclosed spaces can have limitations on access and egress, making them more hazardous in certain situations, especially in terms of ventilation and the presence of harmful gases or other dangers.

The presence of bulkheads and overheads indicates that the space is designed or constructed in a way that can trap gases and vapors, which can create hazardous environments if proper precautions are not taken. Therefore, understanding the structural characteristics of enclosed spaces is crucial for safety assessments and procedures, particularly in maritime and industrial contexts where spaces can be hazardous for personnel.