Confined Space Entry
Confined space entry refers to the regulated process of entering and working in a space that has limited openings for entry and exit, is not designed for continuous worker occupancy, and is large enough for a worker to enter and perform work. Under OSHA's construction standard for confined spaces (29 CFR 1926.1200-1213), employers must evaluate the workplace for permit-required confined spaces, develop entry procedures, and train workers in hazard recognition and emergency response before any entry occurs.
Confined spaces in construction include manholes, utility vaults, tanks, silos, tunnels, crawl spaces, attics, storm drains, and excavations deeper than four feet. These spaces present unique hazards because they can contain hazardous atmospheres (oxygen deficiency, toxic gases, combustible vapors), engulfment hazards (grain, sand, water), or entrapment hazards from converging walls or floors. Confined space incidents in construction are frequently fatal — in many cases, multiple workers die in a single incident when rescuers enter the space without proper equipment and training.
OSHA's confined space standard for construction requires employers to classify each confined space as either a permit-required or non-permit confined space. A permit-required confined space has one or more of the following characteristics: a hazardous atmosphere, potential for engulfment, internal configuration that could trap a worker, or any other recognized serious safety or health hazard. Before any worker enters a permit-required confined space, the employer must develop a written permit program that includes atmospheric testing procedures, ventilation requirements, entry and rescue procedures, and communication protocols. An entry supervisor, authorized entrants, and at least one attendant must be designated for each entry.
Training is a critical component of confined space compliance. Authorized entrants must be trained to recognize hazards, use entry equipment, communicate with attendants, and evacuate when necessary. Attendants must know how to monitor entrants, maintain communication, and summon rescue services. Entry supervisors must verify that all permit conditions are met before authorizing entry. Rescue team members need additional training in confined space rescue techniques. All training must be documented and repeated whenever there is a change in entry procedures, new hazards are identified, or there is evidence that workers do not have adequate understanding. Tracking confined space entry training certifications alongside other safety credentials ensures every worker assigned to a confined space task is properly qualified.