6.4 Periodic Annual Inspection, LOTO Hardware & Removal of Energy Controls
Key Takeaways
- Periodic inspections of energy control procedures must be conducted at least annually by an authorized employee other than the one utilizing the energy control procedure being inspected (29 CFR 1910.147(c)(6)).
- Annual periodic inspection reviews require direct discussions with authorized employees for lockout procedures, and with both authorized AND affected employees for tagout procedures.
- Employers must formally certify periodic inspections under 1910.147(c)(6)(ii), recording machine identification, inspection date, included employees, and inspector name.
- LOTO hardware must meet five strict criteria under 1910.147(c)(5): Durable, Standardized, Substantial (tag pull strength min 50 lbs non-reusable nylon tie), Identifiable, and assigned single-key access.
- Emergency removal of an absent employee's lock under 1910.147(e)(3) requires employer verification of absence, reasonable contact attempts, and informing the worker before they resume on-site work.
6.4 Periodic Annual Inspection, LOTO Hardware & Removal of Energy Controls
Periodic Annual Inspection Protocol (29 CFR 1910.147(c)(6))
To ensure that facility energy control procedures remain effective and are being properly utilized, the employer must conduct a periodic inspection of the energy control procedure at least annually under 29 CFR 1910.147(c)(6).
Mandatory Inspector Qualification Rule
The periodic inspection must be conducted by an authorized employee OTHER THAN the one utilizing the energy control procedure being inspected.
CRITICAL RULE: An authorized technician cannot inspect their own LOTO procedure. The audit must be performed by an independent authorized peer, safety specialist, or supervisor to guarantee impartial evaluation.
Scope of Employee Review: Lockout vs. Tagout
OSHA establishes distinct review requirements depending on whether lockout or tagout devices are utilized during the procedure:
| Procedure Type | Mandatory Review Scope under 1910.147(c)(6)(i) |
|---|---|
| Lockout Procedure Inspection | Must include a review, between the inspector and each authorized employee, of that employee's responsibilities under the energy control procedure being inspected. |
| Tagout Procedure Inspection | Must include a review, between the inspector and each authorized AND affected employee, of that employee's responsibilities, plus the additional training limitations of tags under 1910.147(c)(7)(ii). |
Written Inspection Certification Requirements (1910.147(c)(6)(ii))
The employer must certify that the periodic inspections have been performed. The written certification must contain four mandatory legal elements:
- Identification of the Machine or Equipment on which the energy control procedure was utilized.
- Date of the Inspection.
- Employees Included in the inspection audit.
- Person Performing the Inspection (signature/name of inspector).
Standardized LOTO Hardware Specifications (29 CFR 1910.147(c)(5))
Lockout and tagout devices (locks, tags, chains, wedges, key blocks, adapter pins, self-locking fasteners) must be provided by the employer and must meet five mandatory statutory specifications under 1910.147(c)(5):
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| STATUTORY HARDWARE CRITERIA |
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| 1. DURABLE: Resistant to environmental degradation (chemicals, weather, heat). |
| 2. STANDARDIZED: Uniform within facility by color, shape, or size; tag print. |
| 3. SUBSTANTIAL: Locks prevent force removal; Tags feature 50 lb cable tie. |
| 4. IDENTIFIABLE: Displays identity of authorized employee applying device. |
| 5. EXCLUSIVE USE: Used ONLY for controlling hazardous energy (single-key lock). |
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1. Durable (1910.147(c)(5)(ii)(A))
Lockout and tagout devices must be capable of withstanding the environment to which they are exposed for the maximum period of time that exposure is expected. Tagout devices must be constructed and printed so that exposure to weather conditions or wet and corrosive environments will not cause the tag to deteriorate or the message to become illegible.
2. Standardized (1910.147(c)(5)(ii)(B))
Lockout and tagout devices must be standardized within the facility in at least one of the following criteria: color, shape, or size. Additionally, in the case of tagout devices, print and format must be standardized.
3. Substantial (1910.147(c)(5)(ii)(C))
- Lockout Devices: Must be substantial enough to prevent removal without use of excessive force or unusual techniques (such as bolt cutters or heavy metal cutting tools).
- Tagout Devices: Tagout devices, including their means of attachment, must be substantial enough to prevent inadvertent or accidental removal. Tagout device attachment means must be of a non-reusable type, attachable by hand, self-locking, and non-releasable with a minimum unlocking strength of not less than 50 pounds (e.g., an all-environment nylon cable tie).
4. Identifiable (1910.147(c)(5)(ii)(D))
Lockout devices and tagout devices must indicate the identity of the employee applying the device (e.g., employee name, photo, badge number, and contact info).
5. Exclusive Purpose & Single-Key Lock Rule
LOTO devices must be used ONLY for controlling hazardous energy and shall not be used for locking toolboxes, lockers, storage sheds, or general facility doors. Padlocks must feature single-key access (one lock, one key) to ensure no secondary master key exists in general circulation.
Tagout Limitations & Full Employee Protection (1910.147(c)(5)(iii))
Tags are warning devices only and do not provide physical restraint against energization. If an energy isolating device is capable of being locked out, the employer MUST utilize lockout unless the employer can demonstrate that the utilization of a tagout system will provide full employee protection equivalent to lockout under 1910.147(c)(3).
To demonstrate full employee protection with tagout, the employer must implement additional safety measures, such as removing an isolated circuit element, blocking a control switch, opening an extra disconnecting device, or removing a valve handle.
Emergency Lock Removal Procedure (29 CFR 1910.147(e)(3))
As established in 1910.147(e)(3), the general rule dictates that a LOTO device must be removed only by the authorized employee who applied it. However, when the authorized employee who applied the lock is absent from the facility, the employer may direct the emergency removal of the device provided that specific procedures are followed.
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| EMERGENCY LOCK REMOVAL PROTOCOL |
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| Step 1: Employer verifies that the authorized employee is ABSENT from facility. |
| Step 2: Employer makes ALL REASONABLE EFFORTS to contact employee at home/cell. |
| Step 3: Employer informs employee of lock removal BEFORE they resume on-site work.|
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Mandatory 3-Step Emergency Removal Protocol
- Verification of Absence: The employer must independently verify that the authorized employee who applied the lock is not present in the facility.
- Reasonable Contact Effort: The employer must make all reasonable efforts to contact the authorized employee (e.g., telephone call, text, emergency contact check) to inform them that their lockout device needs to be removed.
- Notification Prior to Resuming Work: The employer must ensure that the authorized employee has knowledge of this removal before they resume work at that facility (e.g., safety supervisor meets employee at entry gate before shift start).
Who is legally authorized under 29 CFR 1910.147(c)(6)(i)(A) to conduct an annual periodic inspection of a machine-specific LOTO procedure?
How do periodic inspection review requirements differ between LOCKOUT procedures and TAGOUT procedures under 29 CFR 1910.147(c)(6)(i)?
What is the statutory minimum unlocking strength required for a tagout device attachment tie under 29 CFR 1910.147(c)(5)(ii)(C)(2)?
What MUST an employer do before removing an absent employee's lockout device under 29 CFR 1910.147(e)(3)?