OSHA 29 CFR 1910.146

Confined Space Entry Requirements

29 CFR 1910.146 mandates that your employer implement a written permit program to protect you from atmospheric and physical hazards.

Hurt in a confined space?

See if you qualify →
Free
2 minutes
Confidential

What this regulation requires

The regulation requires your employer to evaluate the workplace to identify any permit-required confined spaces. If these spaces exist, your employer must inform you of the dangers and implement a formal permit system to control your entry.

Under 1910.146(d), your employer must provide necessary equipment, such as testing monitors and ventilation, at no cost to you. They must also designate an attendant to monitor the space from the outside and ensure rescue services are available for emergencies.

Who this regulation applies to

This standard applies to general industry employers where you enter spaces with limited entry or exit, such as tanks, vessels, silos, and pits. It does not apply to agriculture, construction, or shipyard employment, which are covered by their own specific OSHA standards.

Hurt in a confined space? Check your workers' comp benefits.

Free Benefits Review
Free 2 minutes Confidential

Common violations

OSHA frequently cites employers for failing to identify permit-required spaces under 1910.146(c)(1) or failing to implement a written program. Other common issues include inadequate atmospheric testing and the failure to station a trained attendant outside the space.

In practice, these violations often look like you being sent into a tank without pre-entry air testing or a supervisor failing to provide a retrieval harness. Sometimes, an employer may ignore the permit system entirely to save time on a maintenance task.

Penalties and enforcement

Violations of this standard are often classified as serious or willful, given the high risk of fatality from asphyxiation or engulfment. OSHA frequently conducts inspections following reports of confined space accidents or fatalities. Fines can reach tens of thousands of dollars per violation, and these incidents often trigger comprehensive agency investigations into your employer's overall safety culture.

Your rights if this rule was broken when you got hurt

You have the right to a workplace free from recognized hazards and the right to observe any atmospheric testing performed before you enter a space. If you believe your employer is forcing you to enter an unsafe space, you can file an anonymous complaint with OSHA and are protected from retaliation under Section 11(c) of the OSH Act.

If you were injured in a confined space, document the conditions, including whether a permit was issued and if an attendant was present. Report the injury to your employer immediately and consult with an attorney to ensure your rights are protected during the Workers' Compensation claims process.

Frequently asked questions