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Customizing Confined Space Containers Constrained spaces can be a sewer tank, or an underground excavated area. Often times they are closed off, have limited access and are a risk to get into. Confined space equipment is designed to minimize, mitigate and prevent these types of hazards. It includes personal protective equipment as well as emergency response protocols and training. Safety Closed space equipment is designed to safeguard workers from the various hazards that they may encounter