On May 1, 2015, the Occupational Safety and Health Administration (OSHA) issued a final rule to increase protections for construction workers in confined spaces. This new rule went into effect on August 3, 2015.
Manholes, crawl spaces, tanks and other confined spaces are not intended for continuous occupancy. They are also difficult to exit in an emergency. People working in confined spaces face life-threatening hazards including toxic substances, electrocutions, explosions and asphyxiation.