What are "confined spaces" according to EM 385-1-1?

Confined spaces, as defined by EM 385-1-1, are areas that meet specific criteria related to entry, size, and potential hazards. The correct understanding is that these are spaces large enough for a worker to enter, which implies they are not overly small or restrictive. However, what sets confined spaces apart is their limited means of entry and exit coupled with potential hazards that could affect the health and safety of workers.

These hazards may include, but are not limited to, toxic atmospheres, engulfment, and other dangerous conditions that can arise due to the enclosed nature of the environment. The limited access means that rescue operations, if needed, could be complicated, emphasizing the need for proper protocols and safety measures when working in such spaces.

In contrast, the other options do not accurately describe confined spaces. While spaces accessible only by stairs might restrict access, they don't encapsulate the inherent hazards that define a confined space. Open and well-ventilated areas are contrary to the definition since they typically pose lower risks. Spaces designated solely for storage, while they may be confined, do not inherently include the criteria of safe entry for workers or the presence of hazards necessary to classify them as confined spaces per EM 385-1-