Workers who enter or monitor confined spaces on construction sites must receive role-specific training before doing so under 29 CFR 1926.1207 — and workers who merely work near permit spaces must be informed of the hazards and the no-entry rule.
Who on Your Crew Needs Confined Space Training?
Every worker whose job puts them in or near a confined space needs some form of training or notification — but the required depth depends on their role. Under 29 CFR 1926 Subpart AA and the parallel general industry standard 29 CFR 1910.146(g), three distinct roles carry distinct training obligations.
Authorized Entrants
Authorized entrants are workers who physically enter the space. They need the most detailed role-specific training. Before they set foot inside, they must be able to:
- Identify the hazards they may face — atmospheric, engulfment, convergence, and physical — including the mode of exposure, signs and symptoms, and consequences
- Properly use all equipment assigned in the permit: gas monitors, PPE, communications gear, lighting, and barriers
- Communicate with the attendant throughout the entry
- Alert the attendant to any warning sign or prohibited condition they detect
- Exit immediately when ordered — by the attendant, by the entry supervisor, or when they recognize a hazard themselves
These duties come directly from 29 CFR 1910.146(h), mirrored in 29 CFR 1926.1204.
Attendants
Attendants stay outside the space. Their training covers a different set of skills:
- Knowing the hazards specific to that space, including behavioral effects they might observe in entrants who are being overcome
- Maintaining an accurate count of everyone inside and tracking who is authorized
- Remaining at the portal for the full duration of the entry — they cannot be assigned secondary tasks that take them away from monitoring
- Ordering mandatory evacuation when any prohibited condition appears, when an entrant shows behavioral changes, when an external hazard arises, or when they can no longer perform their duties safely
- Summoning rescue services as soon as they determine entrants may need help to escape
- Never entering the space themselves as part of a rescue attempt
Under 29 CFR 1910.146(i)(4), attendant abandonment — leaving the portal to handle other tasks — is one of the most-cited confined space violations. Your training program must make this line crystal clear.
Entry Supervisors
Entry supervisors authorize each entry by signing the permit. Their training must equip them to:
- Know the hazards of the specific space, not just confined spaces in general
- Verify that every test on the permit has been conducted, that actual numerical results are recorded, and that all isolation and control measures are physically in place — not just confirmed by phone
- Verify that rescue services are available and capable of responding to that specific space's hazards at that specific time
- Terminate entry and cancel the permit the moment a prohibited condition arises
- Remove unauthorized individuals who approach or attempt entry
- Ensure continuity of acceptable conditions when supervision transfers between shifts
Signing the permit from a truck or a trailer without walking the isolation points is a recurring OSHA citation. Training for supervisors must treat the on-site physical verification requirement as non-negotiable.
Workers Who Work Near Confined Spaces (Awareness Level)
Not everyone needs full entrant or attendant training. Workers whose jobs bring them near permit-required confined spaces — adjacent trades, delivery personnel, maintenance workers — must at minimum be informed of the existence, location, and danger of those spaces, and they must understand the no-entry rule. Under 29 CFR 1910.146(c)(7)(i), this notification obligation applies to all exposed employees, even those who will never be authorized to enter.
If your signs are in English and your crew reads Spanish, a faded or foreign-language-only sign is treated as no sign at all for enforcement purposes. Make sure signage and verbal notification reach every worker in a language they actually understand.
What the Training Must Cover
The role-specific lists above are the floor, not the ceiling. Across all roles, your confined space training program must address:
Space classification. Workers must understand the three-part definition of a confined space and what elevates a confined space to permit-required status — actual or potential hazardous atmosphere, engulfment risk, or converging/tapering internal geometry. A space doesn't need a hazardous atmosphere right now to be permit-required; the potential is enough.
Atmospheric hazards. Training must cover the acceptable entry condition ranges — oxygen between 19.5 and 23.5 percent by volume, flammable gases and vapors below 10 percent of the lower flammable limit — and the testing sequence: oxygen first, then flammable gases, then toxic contaminants. Entrants and attendants must understand why the order matters and why a single reading at the opening is not adequate when gases stratify at different depths.
Engulfment and convergence. Workers must understand that engulfment from flowable solids like grain or sand can fully bury a person in seconds and that extraction forces can exceed what any rescue team can apply without equipment. Training must make clear that closing a valve is not isolation — physical blanking, blinding, or double-block-and-bleed is required.
The permit system. All roles must understand the permit, what each field requires, and why blanks or vague entries like "OK" are noncompliant. Actual numerical test results must appear on the permit. The permit is canceled when the entry is complete or when a prohibited condition arises — and canceled permits must be retained for at least one year under 29 CFR 1910.146(e)(6).
Non-entry rescue and the retrieval system. Workers must know that retrieval equipment is required for every entry unless the employer documents a specific exception. For vertical spaces deeper than five feet, a mechanical retrieval device is mandatory — not a standard fall-arrest block. The statistic that shapes this topic: the majority of confined space fatalities involve would-be rescuers who entered without proper equipment and were overcome by the same hazard that incapacitated the original victim.
Communication and evacuation triggers. Training must cover what constitutes a mandatory evacuation trigger — a prohibited condition, behavioral change in an entrant, external hazard, or loss of attendant capacity — and why these triggers are mandatory, not judgment calls. If the communication link breaks for any reason, entry stops.
When Retraining Is Required
OSHA does not set a fixed calendar interval for confined space retraining under 29 CFR 1926.1207(c) or 29 CFR 1910.146(g)(2). Retraining is triggered by events:
| Trigger | Required Action |
|---|---|
| Worker's duties change | Retrain before new duties begin |
| New hazard introduced to the space | Retrain before next entry |
| Permit space operations or procedures change | Retrain before next entry |
| Observed inadequacy in knowledge or performance | Retrain immediately |
Because the federal standard sets no calendar floor, Jobsite applies a 12-month refresher as a program default. This aligns with the practical reality that workers who haven't entered a confined space for several months may not retain the skills for monitor bump testing, retrieval system setup, or evacuation communication — and it gives you a documented audit trail that shows your program is proactive, not reactive.
Do not wait for an incident or an OSHA inspection to identify a gap. If an attendant is observed stepping away from the portal, or if a permit comes back with blanks instead of test readings, those are observable inadequacies that trigger a retraining obligation right then.
What the Training Record Must Show
Under 29 CFR 1910.146(g)(4), training must be documented in writing. The certification record must contain:
- The employee's name
- The trainer's signature or initials
- The date of training
The record must be available to employees and their representatives. A generic LMS completion timestamp without a trainer attestation has been cited. If your platform auto-generates a certificate but doesn't capture the trainer's name and signature, your documentation may not hold up to an inspection.
Retain training records alongside your canceled entry permits. When OSHA asks for your annual program review documentation, canceled permits and the training certifications that correspond to each entry make up the audit package.
The Annual Program Review Connection
Under 29 CFR 1910.146(d)(14), the employer must review the permit-required confined space program using the canceled permits from the prior year, and must revise the program if the review reveals deficiencies. This review is a separate obligation from training — but if the review surfaces a systemic gap in knowledge or procedure, it restarts the retraining trigger for affected roles.
Keeping a box of old permits is not a review. OSHA expects documented evidence — a memo, meeting notes, or a summary — showing what was evaluated, what was found, and what changed. Build your annual review into your training calendar so they happen together.
Jobsite tracks OSHA compliance training, certifications, and inspection records for construction contractors — so your confined space training records, permit retention, and retraining triggers stay current and audit-ready. [See how Jobsite manages training compliance →](/product/training)
FAQ
Does construction confined space training satisfy general industry requirements too?
Not automatically. Construction confined space training is governed by 29 CFR 1926.1207, and general industry is governed by 29 CFR 1910.146(g). The content requirements are substantially similar, but if a worker transitions between site types, verify that the training documentation references the applicable standard for the work being performed. When in doubt, conduct role-specific training tied to the standard that governs the actual work.
Can one person serve as both the entry supervisor and the attendant?
The standard does not prohibit it, but it creates serious operational problems. The attendant must remain at the portal for the entire entry under 29 CFR 1910.146(i)(4). If the entry supervisor is also the attendant, they cannot leave to manage site safety, coordinate with emergency services, or perform the broader supervisory functions the role requires. This dual assignment should be avoided except for the smallest, lowest-hazard entries.
What happens if a worker refuses to leave when the attendant orders evacuation?
The attendant's evacuation order under 29 CFR 1910.146(i)(6) and 29 CFR 1926.1204(e)(7) is mandatory — it is not a suggestion. An entrant who becomes confused, combative, or unresponsive may be showing behavioral effects of hazard exposure, which is itself a required evacuation trigger. Training must cover this scenario specifically: a worker who won't self-rescue is a sign that the hazard is already affecting them, not a reason to delay.
How long do we have to keep training records and canceled permits?
Canceled entry permits must be retained for at least one year under 29 CFR 1910.146(e)(6) to support the required annual program review. Training certification records under 29 CFR 1910.146(g)(4) must be available to employees and their representatives; the standard does not specify a retention period beyond availability, so retaining them for the duration of employment plus any applicable state record-keeping period is the conservative practice.
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About the author
The Jobsite Editorial Team — Construction safety & OSHA compliance
The Jobsite Editorial Team writes the safety and compliance library behind Jobsite, the construction safety, OSHA compliance, and training platform for contractors. Every article starts from the primary regulatory text — the CFR section itself, not a summary of it — and is fact-checked against that source before it publishes, so what you read here is what the standard actually requires of small and mid-size contractors in the field.